Larvae 



1. Antennae arising close together on a mesal raised 



area or protuberance of the head (Fig. 3) 



Chaoboridae 



Antennae arising far apart at sides of head (Fig. 

 125, 126) 2 



Fig. 3. — Head of larva of Corethrella. 



Fig. a. — Larva of Mochlonyx ciiiclipes. (Redrawn from Mathe- 

 son 19-i-i. ) 



Fig. 5. — Larva of Chaobortis punctipuniih. (Redrawn from 

 Matheson 19-44.) 



2. Last segment of abdomen with sclerotized ring or 

 phxte at least dorsally (Fig. 126, 127); apical or 

 subapical hairs of antenna slender and less than 



half length of antenna Culicidae 



Last segment of abdomen without a sclerotized ring 

 or plate; apical and subapical hairs of antenna 

 very stout and at least half length of antenna 

 (Fig. 4, 5) Chaobaridae 



LIST OF INCLUDED SPECIES 



Species having names below in boldface type are 

 known to occur in Illinois; species having names in 

 italic type are known from neighboring states but not 

 yet from Illinois. 

 Aedes abserratus (Felt & Young) 



aegypti (Linnaeus) 



atlanticus Dyar & Knab* 



atropulpi/i (Coquilletr) 



aurifer (Cocjuillett) 



campestris Dyar & Knab 



canadensis (Theobald) 



cinereus Meigen 



iotiimi/iiis ( De Geer ; 



dorsalis (Meigen) 



dupreei (Coquillett) 



excrucians (Walker) 



fitchi ( i"clt & Young) 



flavescens (Mueller) 



fulvus pallens E. S. Ross 



grossbecki Dyar & Knab 



hendersoni Cockerell 



infirmatus Dyar & Knab 



mitchellae (Dyar) 



nigromaculis (Ludlow) 



punctor (Kirhy) 



sollicitans (Walker) 



• The Illinois record fnr this aperits lias not been verified 

 "by larvnl nr malo HiioclmcnH. 



spenceri (Theobald) 



sticticus (Meigen) 



.stimulans ( Walker) 



thibaulti Dyar & Knab 



tormentor Dyar & Knab 



trichuriis ( Dyar ) 



triseriatus (Say) 



trivittatus (Coquillett) 



vexans (Meigen) 

 Anopheles barberi Cocjuillett 



crucians Wiedemann 



cark't ( Vargas ) 



punctipennis (Say) 



quadrimaculatus Say 



walkeri Theobald 

 Culex erraticus (Dyar lV Knab) 



peccator Dyar & Knab 



pipiens Linnaeus 



quinquefasciatus Say 



restuans Theobald 



salinarius Coquillett 



tarsalis Coquillett 



territans Walker 

 Culiseta inornata (Williston) 



mehtnina ( Coquillet ) 



minnesotae Barr 



morsitans (Theobald) 

 Mansonia perturbans (Walker) 

 Orthopodomyia alba Baker 



signifera (Coquillett) 

 Psorophora ciliata (Fabricius) 



confinnis ( Arribalzaga) 



cyanescens (Coquillett) 



discolor (Coquillett) 



ferox (Humboldt) 



horrida (Dyar & Knab) 



howardi (Coquillett) 



longipalpis Roth 



varipes (Coquillett) 

 Toxorhynchites rutilus septentrionalis Dyar & Knab 

 Uranotaenia sapphirina (Osten Sacken) 

 Wyeotnyia smithi (Coquillett) 



KEY TO SEXES OF CULICIDAE ADULTS 



Tip ol abdomen blunt or pointed and having only un- 

 segmented lobes (the cerci) projecting from it (Fig. 

 6) females 



Tip of abdomen having a complex set of genital parts, 

 of which the most conspicuous is a pair of daspers, 

 each clasper di\ided into two segments, the basistyle 

 and the dististyle (Fig. 65, 68-72) males 



KEYS TO CULICIDAE FEMALES 



The chici j->arts ii.uikiI in these keys are illustrated 

 in Fig. 6; detailed characters are included in diagnostic 

 drawings illustrating the couplets. Although this set 

 of keys (especially the key to genera) will serve for the 

 identification of most males, many collected and reared 

 males have parts so shriveled, distorted, or rubbed that 



