16. 
LG 
18. 
19. 
20. 
Zile 
22. 
23. 
THE MOSQUITOES OF THE SOUTHEASTERN STATES 
broad, dark, appressed scales, see last half of coupjet 48). [Post- 
spiracular bristles absent. ]______- ==-_ == Culex, Theobaldia 
Tip of abdomen tapered (fig. 17, A), eighth segment usually retracted, 
the cerci exserted. [Postspiracular bristles present.]_-_____________ 
Mesonotum with scattered broad, pale scales; abdominal segments with 
apical pale scaling. A bluish Psorophora (Janthinosoma), which lacks 
the white bands on the hind tarsi (see couplet 40) 
Psorophora cyanescens 
Mesonotal scales narrow, dark; abdomen usually with basal segmental 
bands that widen laterally. [Palpi short in both sexes.] Rare in 
SOU Het cet he «ae Bar De Hees 2 eo) Cae Lose Aedes cinereus 
Medium-sized or small species; wings and legs not speckled with white 
seales. [The two cross veins arising from vein 4 well separated. ]____ 
A large species with unusually broad, lightly scaled wings; costa and 
first vein, femur, and tibia sprinkled with white. [The two cross veins 
in center of wing (arising from vein 4) separated by less than the 
length of either one; dorsal surface of abdominal segments with 
diffused pale scaling basally and laterally; spiracular bristles present ; 
base of subcostal vein on under side of wing with a row of long setae. | 
Rare in Florida but occasionally common elsewhere 
Theobaldia inornata 
Dorsal abdominal white bands or lateral spots basal when present__ 
Abdomen with narrow dorsal bands and (or) lateral spots of white 
scales on apical (posterior) margin of segments____ Culex apicalis 
Abdomen dorsally with conspicuous segmental bands of white scales. 
[Seventh segment without pale scales posteriorly; occiput with nar- 
row, curved scales; outstanding wing scales narrow.]___-___________ 
Abdomen unbanded dorsally or with narrow segmental bands (fairly 
broad bands of yellowish scales sometimes present in C. salinarius) __ 
Abdominal bands with a rounded posterior border (usually most typical 
on segments 3 to 5) and the bands interrupted or much narrowed at 
lateral margins. [Mesonotum without dots; mesonotal vestiture of 
narrow, curved, or lanceolate scales pale brown or grayish and having 
a coarse appearance; second marginal cell usually two and a half 
to three times the length of its petiole.] The southern house mosquito 
Culex quinquefasciatus 
Abdominal bands continuous to lateral margins, their posterior borders 
Somewhat irregular but not evenly rounded. [Second marginal cell 
long, usually four or five times as long as its petiole. {| Peete aes 
Mesonotum usually with a pair, sometimes two pairs, of small white dots 
near the middle (fig. 12, K) and with grayish scales around the mar- 
gins; mesonotal vestiture otherwise brownish and with a smooth ap- 
pearance, mostly of fine hairlike scales. The white-dotted Culex 
Culex restuans 
Mesonotum without white dots; mesonotal scales coarser and grayish 
in color (similar to C. quinquefasciatus). The northern house mos- 
quito, found in northern Tennessee and North Carolina__Culex pipiens 
Wings with all outstanding scales long and slender (fig. 19, A) ; occiput 
(top part of head back of eyes) without flat scales; mesonotum with 
very fine dark-brown hairlike scales. Medium-sized species == 
Outstanding scales of wing, at least on branches of vein 2, slightly or 
distinctly broadened (fig. 19, B) ; occiput with some broad, flat scales 
(excepteinee Th COuGglaia meClaniurd 2 sos 
Abdomen usually with a few yellowish or dingy white scales at base 
of some segments, or with narrow transverse bands; tips of segments 
sometimes slightly pale-scaled and seventh segment frequently en- 
tirely pale-scaled; three or four groups of white scales on side of 
thorax. Abundant in some sections of South and East 
Culex salinarius 
Abdomen dark-scaled above except for lateral white spots on some 
segments; Scaling on pleurae somewhat variable but frequently en- 
tirely lacking or, if present, limited as a rule to less than a half dozen 
scales in any of the groups. Abundant in Florida, rare elsewhere 
Culex nigripalpus 
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