CICm\>. u/ Circular No. 72. I inicil States Departmeul rn nlmi<\ BUREAU OK KNTOMOI.O'. i 11 HOWARD. Bnli ' ■ loglnl tnd ( KM Hi nil KNOWN LARY.H 01 Mil 'Iom'I iiiiImiI r.Hl I Mint STATES. ii\ Harbison G. I', lb. ^vT 1. Larvw without ;i distinct air tube, the air hole with Maps hut no elongated . floating :it surface of water in a horizontal position. The malaria Subfamily iNOPHEl in B 3 Larvae with a distinct elongated air tube ; floating below the Biirface ol watei . usually obliquely, hanging bj the tube - 2. The last segment, beyond the air tube, with a ventral brush or rudder in the middle ol the segment behind Bubfamily Ci inisv: 8 Last segment without a median hrush, the hairs paired on the two sides, none nn mill-ventral line Suht'amily S \ BE I il I s l . Only on.- species, in leaves ol pitcher plants in cold bi • Wyeomyia smithix Coquillett. I, Ibbdomen wTli plumose lateral hairs on the Brat three segments onlj ; head with plumose hairs I Abdomen with plumose hairs to the sixth segment ; head without plumose hairs. I ives in hollow trees Anophela barberi Coquillett. t. Latent mthe'eighth segment below the air hole) with one long lower tooth followed by four little ones, Anophela franciscanut McCracken. ral combV^yd one lotfg lower tooth followed bj three little ones. A nopht It t punctipi nni Lateral comb with th • lower long tooth followed by another as long or nearly BO * •' ». Lateral comb With the upper tooth >h..n .1 ;.<,,,/,, i. - „m, ulipt nnis Meigen. Lateral comb with tbe upper tootA long .1 nopht la crucian* Wiedemann. 8. Mouth brush folded ootwa/d when not in use, not vibratile, used to seize only. Predaceons on other mosquito larva 7 Month hrush folding inward, tailed, vibraUle, usualh continually in motion. I on microscopic organisms and vegetable detritus 9 \ plate on the side on the eighth abdominal segment. Only one -; living in hollow trees ami water barrel-.; beneficial. Megarhinus portoricenns von Roder. A patch of Bmall scales on the ride oi theeighth abdominal segment. I iving • in temporary puddles; beneficial species s s. Labial plate (mentnm) ol bead with the teeth regular and alike. Psorophora ciliata Fabricius. bial plate with the next to the basal tooth much enlarged. Psorophora howardii Coquillett. here n-< ■■! have t*rii made uniform with too* - Bureau, to facilit names employed in thatixiblieation are (riven in I 10. Antennae with tuft outwardly placed, in a notch, the apical part of antenna slender; air tube long, over three times as long as wide 10 Antennae with the tuft at or before the middle, the apical part not more slender; air tube usually shorter than three times its width .. 17 Lateral comb of the eighth segment a patch of spines 11 Lateral comb of the eighth segment a row of bars .... 16 mouth brush head hairs.. antcnnal tuft ... antenna ...eye thoracic ^' : :';-' 3 hair tufts -.-^lateral abdom. hairs subdorsal ■»-:;:* abd. hairs lateral comb ,-ai'r tube ventral brush anal c*ills dorsal ti Fig. 1.— Diagram of a mosquito larva {Culexsalinarius), with names of the parts referred t'> in the key (original I. 11. Anal segment with a row of hairs along the ventral line to base; an early spring species Oulicella dyari Coqnillett. Anal segment without any tufts in front of the ventral brash 12 12. Air tube with four paired tufts posteriorly outwardly, the subapical one moved sideways out of line 13 Air tube with four to ten paired tufts along the posterior line in a straight row, none displaced 15 I : \n t ii l it* over Ave timet as long :i- wide, nearlj straight, without marked tapering; living in Iresh-water pools, rain barrels, etc. t'nli i aalinariua Coquillett. \n tube lee* than Ave times m long as wide, tapering rathei rapid!} att<-i the middle, somewhat fusiform in shape it ii. \n tube five times as long a- wide, its pecten of l ■"• teeth; subdorsal hairs ol thud :\ 1 1 « 1 fourth abdominal segments donbie. introduced il stic mosquito ( ult i /"/'<> ns Linns us. \ n tnbe four times as long as wide, its pecten "i nine teeth; subdorsal I ..i the thud and fourth abdominal segments single. Southern domestic mosquito Culea fatigant Wiedemann. 1 16 \n tube "li^lith expanded ai tip, Bummei Bwamp mosquito. The adull does not bite Culea territant Walker. An tube evenly tapered i<> tip. Living in permanent pools all summer. < 'nh i taraalit < loquilletl . ii;. Ban ol comb in a perfect!} regular row ; >km smooth. Hibernates as fully grown larva in permanent pools Melanoconion melanurut Coquillett. Bars pi comb in an irregular row ; -km minutely pilose. • Mochlostyraa erraticus Dyar and Knab. 17. \u- tnbe strongly inflated ; anal segment with a chitinous ring, pierced bj a r< >w of tufts along the ventral line 18 tnbe not inflated ; anal segment not ringed, or, if so, without tufts along the ventral line 20 18. intennse long and prominent 19 Antenna? less long, moderate only. Developing rapidly in rain puddles. a nih li ii iii i n jamait > n^i- Tl bald. 19. Lateral comb of the eighth Begment of bu or -even nearly equal teeth. Developing rapidly in rain puddles Janthinosoma scnyi Dyar and Knah. Lateral comb of the eighth Begment of Bve teeth, the upper and lowei ones small Janthinosoma />/;■. Coquillett. 20. Antennae inflated and bent. Rapidly developing in rain puddles. ibhamia discolor < 'oquillett. kntennse not markedly inflated <>i bent ... 21 •_'l. Head with a lateral prominent angle which receives a process "ii the man- dible. In c rah hni \ one sp< Mtonts ssppstriiM Osten-Skcken. 26. Lower head tuft with three long hairs, the upper multiple. In permanent water, with a northern distribution Culiseta absdbrinus Felt. Lower and upper head tufts alike, multiple 27 27. Basal pecten teeth of the air tube with one branch. In pools, barrels, etc., with western distribution — __ Theobaldia inddens Thomson. Basal pecten teeth of air tube with several branches. In pools, with eastern and southern distribution Ciiliseta consobrinus Desvoidy. 28. Air tube with several hair tufts 29 Air tube with only one pair of tufts 30 29. Air tube long; anal segment with a complete ring. Living in pools and rain barrels Cider restuans Theobald. Air tube short; anal segment not fully ringed. An early spring species. Ochlerotatus trichurus Dyar. 1 30. Air tube with the hair tuft within the pecten 11 Air tube with the hair tuft beyond the pecten , 33 31. Anal segment ringed with a horny plate 32 Anal segment not ringed. In pot holes in rocks. • Ochlerotatus atropalpus Coquillett. 32. Lateral comb of the eighth segment a few scales in a row. In swamps, with a southern distribution Aedes tormentor Dyar and Knab. 2 Lateral comb of the eighth segment a large patch of scales. Ochlerotatus bimaculatus Coquillett. 33. Pecten of the air tube with detached teeth outwardly 34 Pecten of the air tube with all the teeth evenly spaced 38 34. Air tube four times as long as wide; lateral comb of the eighth segment a patch of scales three rows deep. An early spring species. Ochlerotatus abfitchii Felt. Air tube three times as long as wide or less; lateral comb of the eighth segment of few scales 35 35. Antenme enlarged basally ; tuft rather beyond the middle. An early spring species Ochlerotatus aurifer Coquillett. Antenna? moderate only; the tuft before the middle 36 36. The two rows of the pecten of the air tube approximate behind; dorsal plate of anal segment a saddle only. An early spring species. Ochlerotatus impiger Walker. The two rows of pecten well separated; dorsal plate more than half encir- cling the anal segment 87 37. Tuft of the tube before the outer third; anal gills blunt. In rain puddles. Ochlerotatus sylvestris Theobald. Tuft of tube beyond the outer third; anal processes pointed. In rain puddles. Aedes fuscus Osten-Sacken. 38. Comb scales few, in a single or irregularly single row __ :;'■' Comb scales more numerous to many, in a patch 4."> 39. Anal segment ringed by the plate 40 Anal segment not completely ringed by the plate ... .- 42 40. Anal gills moderate, normal 41 Anal gills very long with stout central trachea. In pools, not coming to the surface; distribution southern Ochlerotatus dupreei Coquillett. 41. Pecten of air tube running about one-third; anal segment not longer than wide. An early spring species Ochlerotatus pUnctor Kirby. Pecten of air tube running about one-half; anal segment longer than wide. Aedes atlanticus Dyar and Knab.- 1 Ochlerotatus cinereobor talis. 1 1, hi, rotatus serratus (in part l 12. Scales ol the comb "i the eighth sej • 1 1 1 smooth, bluntl) nded. In hollow trees and rain barrels Ochlerotatus triseriatus Bay. Scales o( comb sole shaped with tritid apex. The yellow fevei mosquito. ■.tiiiiim i alopus Mi i I, \nal segment ringed bj the plate n Anal Begmenl not completely ringed bj i In- plate II. \ii tube ovei twice a- long a- wide, its i ten ol Ifl to 22 teeth 15 Air i a I if twice a- l"ii:; a- wide oi less, its pecten "i 12 to 1 1 i >eth I s Scales ol the comb with the central Bpinule Bhortei than the bodj ol the Bcale; pecten of the air tube ol equal teeth 16 Scales ol the comb with central Bpinule as long a- the bodj ol the scale; pecten ol the air tube longer outwardlj 17 16. Vn' tube i %\ • > and o ball times as l"n_ r as wide; comb scales moderate. The Atlantic coasl Balt-marsh mosquito Oeh\ wllicitatu Walker. Air tube three times as long as wide; comb scales long. In rain puddles, with a southern distribution Ochlerotatus mitchella Dyar. 17. Air tube pecten reaching to bey I the middle ol t r i » - tube; lateral comb ol 21 scales in nearlj three rows Ochlerotatus trivittatus Coquillett. Air lulu- pecten not reaching to the middle of the tube; comb ol 17 - in two imperfect rows. An earl) Bpring -pern--. Ot hlerotatus auroidU s Felt, ales ol tin' comb leathered on the Bides, with central thorn. Ae'des infirmatus I "• ar and Kn - ales of the comb evenly feathered ; no central thorn 10 19. Air tube one and one-half times as long as n ide ; pi cten teeth broadly ellip- tical. In puddles along the Atlantic seaboard Qchlt rotatusdamnosus Bay. Air tube twice as long as wide; pecten teeth narrowly elliptical. An early spring species Ochlerotatus inconspicuus Grossbeck. 50. Air tube lour times as long a- wide; tracheae narrow, angled. An early spring species Ochlerotatus fitchii Felt and young. Air tube three times as long a- wide or less ">i 51. \iial plate small ; gills very large, sack like, spotted. Oi • - varipalpus < Coquillett. Anal plate over half encircling the segment : anal gills i lerateor smal 52. Comb Bcales tapered, a Bingle median Bpiuule stoutei or larger than the real Comb scales bluntly rounded, the median Bpinule resembling theotl 53. Both of the hair tufts on the front of the head multiple 54 The lower head tuft single i>r double (rarely three) 54. Subdorsal prothoracic hairs Bingle. In temporary pool:.. Ochlerotatus canadensis Theobald. Ochlerotatus nivitarsis Coquillett. Subdorsal prothoracic hairs multiple 55. Weakly colored; tufts of ventral brush Bhort-stemraed. In puddles near the sea along the Atlantic coast Ochlerotatus cantatoi Coquillett. Darkly colored : tufts of the ventral brush long-stemmed. An earl) spring Bpecies in the Northwest Ochlerotatus pullatus Coquillett. 68. Lower head hair double >or triple) ">7 Lower head hair single n/irmahu ■ tchUrotattii ' ■ [mpei fectly known 6 57. Comb scales with lateral apinulea as long as the apical one. An early spring species. Aedes grossbecki Dyar and Enab.' Comb scales with the lateral spinules very short. An early spring spei Ochlerotatus pr< tans < 'i "->beck. 58. Apical spinule of the comb scale sharp and distinct An early species in the Northwest Ochlerotatus aestivalis Dyar. .Apical spinule of comb scale not sharply distinct. An early spring species in the Northeast .. Ochlerotatus subajtntans Felt. "ii». Anal gills moderately long. An early spring species in the Northeast. Ochlerotatus laearensis Kelt. Anal gills very short, bud-shaped. The Pacific coast salt-marsh mosquito. Aedes quaylei Dyar and Knab.'-' 1 Letridoplatys tquamiaer < i i > parti • Ochlerotatus lativittatus Approved : James Wilson, Secretary of Agriculture. Washington, D. C, April 27, 1906. O L UNIVERSITY OF FLORIDA 3 1262 09216 4945 4T >t-c^ ■ - L^K/L