70 MISC. PUBLICATION 336, U. S. DEPT. OF AGRICULTURE 
24. Occiput with broad dusky or pale appressed scales in front, sometimes 
limited to a narrow border along the eyes, but extending to or nearly 
to vertex; abdominal segments with or without narrow white bands. 
Small® Culex subzenusMiVelanoconio 1 a =maaeee | ee eee eee eee 25 
Occiput without flat scales. [Proboscis unusually long (longer than 
abdomen) ; wing scales dense and distinctly broadened; spiracular 
bristles and ventral setae at base of subcosta present as in Theobaldia 
inornata (lacking in all Culex).| A comparatively rare species, greatly 
resembling typical C2lep sess ee ee eee Theobaldia melanura 
25. Occiput mostly covered with broad appressed scales, the narrow scales 
limited to a median line or a small triangular patch. [Tip of male 
abdomen much enlarged in Culex peccator.|__~__—_____ Culex pilosus 
Culex peccator 
Figure 19.—Representative shapes of the outstanding wing scales on the 
central portion of the forks of vein 2: A, Culex (Culex) ; B, Culex (Melano- 
conion). 
Occiput with a large median triangular area of narrow scales extending 
nearly to the vertex, the broad appressed scales often reduced to a 
narrow line bordering the eyes. [Mesonotal scaling often bronzy or 
olden. [aw Le Se a a ae ta ae ee Culex erraticus 
(Adults of the Melanoconion species cannot be identified with certainty 
except by characters of the male terminalia, which are given in a 
separate table). 
26. (13) Not exceptionally large species; legs not markedly shaggy__-_--- 28 
Very large species of striking appearance, the gallinippers (fig. 2, B) ; 
legs shaggy or with tufts of long, erect scales toward tips of femur 
and tibia. [Side of mesonotum with an area of broad white ap- 
pressed scales, bordered by smooth nude areas; posterior pronotal 
lobe nude, or with very few scales or bristles. | 
Psorophora (Psorophora) 27 
27. Legs, especially the hind pair, with long, erect scales; mesonotum with 
a median stripe of golden scales (fig. 12, H); tarsi with basal pale 
rings; proboscis ringed; general color yellowish__ Psorophora ciliata 
| 
