108 American Midland Naturalist Monograph No. 3 



Keys to the Species 



adult females 



Large species with very broad, sparsely scaled wings; costa with mixed dark and 

 white scales; cross veins arising from vein 4 separated by less than the length 

 of either cross vein; spiracular bristles yellow, numerous (approximately 10 to 

 15) inornala (Will.), p. 108 



Medium sized species with wings normal in shape and densely scaled; costa entirely 

 dark scaled ; cross veins arising from vein 4 separated by more than the length 

 of either cross vein; spiracular bristles dark, few in number (rarely more 

 than 5) melanura (Coq.), p. 112 



MALE TERMINALIA 



Lobes of the ninth tergite prominent, dome-like, heavily sclerotized, crowned with 

 numerous short stout spines; plates of phallosome long, slender, heavily sclero- 

 tized except for hyaline portion at apex inornala (Will.), p. 109 



Lobes of ninth tergite only slightly elevated, not dome-like, weakly sclerotized, 

 bearing several setae; phallosome short, broad, lightly sclerotized throughout 

 melanura (Coq.), p. 1 12 



LARVAE (fourth INSTAr) 



Lower and upper head hairs (B and C) multiple, long; pecten followed by an even 

 row of long hairs; the basal tuft of siphon large; siphon about 3j/2:l ; comb 

 consisting of many scales in a patch inornala (Will.), p. 1 1 1 



Lower head hair (B) single, upper head hair (C) much shorter and multiple; 

 pecten followed by a row of about 12 short subequal tufts; the basal tuft of 

 siphon small; siphon about 6 or 7:1 ; comb consisting of a single row of about 

 25 long bar-like scales melanura (Coq.), p. 112 



Culiseta (Culiseta) INORNATA (Williston) 



Culex inornatus Williston, 1893, U. S. Dept. Agr. Div. Ornith. and Mam., N. Amer. 

 Fauna, No. 7:253. 



ADULT FEMALE. — Large species. Head: Proboscis long, dark scaled, speckled 

 with inconspicuous pale scales; palpus short, dark, speckled with white scales. 

 Broad dorsal region of occiput clothed with white to pale yellow lanceolate 

 scales and numerous dark erect forked scales; lateral region of occiput clothed 

 with broad whitish scales. Thorax: Integument of scutum brown; scales of 

 dorsal surface narrow, golden-brown and pale yellow intermixed; anterior and 

 lateral margins and prescutellar space pale-yellow scaled. Numerous yellow 

 spiracular bristles present; postspiracular bristles absent. Abdomen: First tergite 

 whitish-yellow scaled; tergites II to VII each with a whitish-yellow basal band 

 which broadens on either side to clothe the entire lateral margin of the segment, 

 the remaining scales dark brown; eighth tergite entirely pale scaled. Venter 

 clothed with pale yellow scales. Legs: Legs dark brown, with the femora and 

 tibiae, and often the tarsi, speckled with pale scales. Wing: Wing very large 

 and broad, with the points of origin of cross veins 3-4 and 4-5 separated by less 

 than the length of either cross vein; scales small, narrow, dark and rather sparse 

 on all veins but costa, subcosta and vein 1, where they are broader, more 

 numerous and intermixed with white scales. A dense tuft of yellowish setae 

 present at base of subcosta on under side of wing (Fig. 55A). 



