Carpenter et ai..: Mosquitoes of Southern U. S. 89 



Siphon cylindrical or fusiform, not adapted for piercing roots of aquatic plants 2 



2. Siphon with a pecten 3 



Siphon without a pecten 8 



3. Lower and upper head hairs (B, C) very stout, spine-like, single; head longer 



than wide Uranolacnia L. A., p. 100 



Lower and upper head hairs (B, C) slender, not spine-like, single, double or 

 multiple; head at least as wide as long 4 



4. Head with a prominent triangular pouch on each side; anal segment with divided 



dorsal and ventral sclerotic plates, membranous laterally 



- Deinoceriics Theob., p. 274 



Head without a prominent triangular pouch on each side; anal segment completely 

 ringed by the dorsal plate or membranous only ventrally 5 



5. Siphon with a pair of large basal subventral hair tufts, or, if tufts are small, 



ccmb scales in a single row and bar-like Culiscta Felt, p. 107 



Siphon without a pair of basal subventral hair tufts ..6 



6. Siphon with several pairs of subventral hair tufts or single hairs Culex Linn., p. 237 



Siphon with one median pair of subventral hair tufts (sometimes vestigial) or one 

 pair of single hairs 7 



7. Anal segment completely ringed by the dorsal plate and pierced on the midventral 



line by tufts of ventral brush Psorophura R. D., p. 130 



Anal segment not completely ringed by the dorsal plate, or if ringed, not pierced 

 on midventral line by tufts of ventral brush AeJes Meigen, p. 165 



8. Anal segment with prominent median ventral brush consisting of a close-set row 



of tufts; comb with a row of short pointed scales and a second row of much 

 longer pointed scales Orihopodompla Theob., p. 114 



Anal segment without a median ventral brush, but with a pair of ventrolateral 

 tufts; comb scales in a single row IVyieomvia TTieob., p. 89 



Genus Wyeomyia Theobald i 



Wveompia Theobald, 1901, Mon. Culic, 2:267. 



The genus Wyeo7nyia is confined mostly to the tropical and subtropical 

 regions of the New World. One species, W. smithii, extends into the north 

 temperate zone in North America. The larvae are found in water collections 

 in plants. The adults are mostly diurnal; the females are known to bite warm- 

 blooded animals occasionally. The genus is represented in the United States 

 by three species. 



SALIENT characters. — Adult: Postnotum always has a tuft of setae. 

 Palpi short. Palpi and antennae of males and females are similar; however, the 

 plumes are sometimes better developed in males than in females. Thorax dull 

 colored, never conspicuously ornamented. Spiracular bristles always present. 

 Abdomen blunt tipped. Squama without fringe, one to three small hairs rarely 

 present. Male Terminalia: Basistyle and dististyle variable; dististyle usually 

 with swollen head. Phallosome simple. Tenth sternites with 2 or 3 terminal 

 teeth. Larva: Comb scales of eighth segment usually in a single regular row. 

 Pecten absent or represented by a few teeth. Hairs of siphon single or branched, 

 arising from all aspects, in no definite pattern. Ventral brush represented by 

 bilateral ventro-lateral tufts. 



1 Se<? Edwards (\^'^1) and Lane and Cerqueira (1942) for synonymy. 



