Genus Theobaldia. 279 



Theobaldia incidens. Thomson (1868). 

 Theobaldinella incidens. Thomson (1868). 

 Culex incidens. Thomson (1868). 

 Culex particeps. Adams (1903). 



Eugen. Resa. Dipt., p. 443 (1868); Mono. Culicid. III., p. 151 (1903) 

 (Theobaldia incidens), Theobald; Les Moustiques, p. 393 (1905), 

 Blanchard (Theobaldinella) ; Class. Mosq. N. and M. America, Tech. 

 Se. 11, U.S. Dept. Agri., p. 22 (1906), Coquillett. 



Note. — A large amount of new material has been received 

 from Miss Ludlow and others in America. 



A large number have been received from Pecos Canon, New 

 Mexico. These showed more evident leg banding than in others 

 I have seen, especially on the hind legs of one or two specimens. 

 The position of the posterior cross-vein is seen to vary con- 

 siderably. 



Additional localities. — Fort Apache, Arizona ; Boise Barracks, 

 Idaho ; Fort Washakie, Wyoming ; Fort Wingate, New Mexico ; 

 Washington (Miss Ludlow) ; British Columbia (Dr. Dyar). 



Synonomy. — I cannot see any reason for separating Adams' 

 Culex particeps from this species. The only difference in the 

 description is that the petiole of the first fork-cell in the female 

 is one-third the length of the cell ; this is unusually short, but 

 its relative length varies so much it is of no account ; the other 

 feature I have not noticed is the presence of a few yellow scales 

 on the proboscis and some white ones at the base of the wings. 



Coquillett also places particeps as a synonym of incidens. 



Adams' description is here appended. 



Culex particeps. Adams (1903). 



Kansas Uni. Sci. II., 2, p. 26 (1903). 



" c? . Head brown covered with yellowish scales, among which are 

 some pure white ones, few hairs along eyes black ; proboscis dark brown, 

 bearing a few yellowish scales ; palpi brown, base of each segment white ; 

 antennae brown, lighter at base ; thorax brown, bearing yellow and white 

 scales, the latter most prominent on posterior part, pile black ; halteres 

 pale with brown knobs ; abdomen brown, scales at base of segments 

 white, on remaining part of segments the scales are brown, a few scattering 

 ones yellow, venter almost wholly covered with white scales ; fore coxae 

 brown, others rather pale ; femora black with the posterior side on basal 

 half, and a ring near apex white scaled ; tibiae black, with a few white 

 scales ; tarsi black, with bases white ; front and mid tarsal claws toothed, 



