688 MOSQUITOES OF NORTH AMERICA 



wise distinguishable. We have made preparations of male genitalia from speci- 

 mens representing the two colorational forms and they agree in every respect. 

 We have one male from California and three from Idaho, but no larvse from 

 these localities. We have larvae from British Columbia, but no male. It is 

 therefore possible, although we think not probable, that there are two species 

 involved. The species is allied to Aedes dbfitchii and represents that species in 

 the West. The genitalia of these two forms are alike, and in view of the fact 

 that the genitalia are usually diagnostic of species in this group, it might be 

 preferable to classify A. sansoni as a subspecies of A. dbfitchii. 



AEDES ABFITCHII (Felt) Dyar & Knab. - >'* " ' ' ' "^ ' ' 



Cvlex cantans (no. 1) Dyar & Knab (not Meigen), Proc. Ent. Sec. Wash., vi, 143, 1904. 



Culex abfltchii Felt, Bull. 79, N. Y. State Mus., 381, 1904. 



Culicada abfitcnu Felt, Bull. 79, N. Y. State Mus., 391c, 1904. 



Culex siphonalis Grossbeck, Can. Ent., xxxvi, 332, 1904. 



Culex abfitehii Dyar, Journ. N. Y. Ent. Soc, xiii, 29, 1905. 



Culicada abfltcnU Felt, Bull. 97, N. Y. State Mus., 475, 1905. 



Culex siphonalis Smith & Grossbeck, Psyche, xU, 16, 1905. 



Orabhamia abfltchii Dyar, Journ. N. Y. Ent. Soc, xiii, 186, 1905. 



Culex siphonalis Smith, N. J. Agr. Exp. Sta., Kept. Mosq., 243, 1905. 



Aedes abfltchii Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 193, 1906. 



Ochlerotatus abfltchii Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 20, 1906. 



Ochlerotatus abfltchii Dyar, U. S. Dept. Agr., Bur. Ent., Circular 72, 4, 1906. 



Culicada abfltchii Theobald, Mon. Culic, Iv, 328, 1907. 



Culicada siphonalis Theobald, Mon. Culic, iv, 330, 1907. 



Culex abfltchii Smith, Can. Ent., xxxix, 119, 1907. 



Aedes stimulans Dyar (not Spelser), Proc. Ent. Soc. Wash., xi, 149, 1909. 



Culicada abfltchii Theobald, Mon. Culic, v, 296, 1910. 



Aedes abfltchii Morse, Ann. Rept. N. J. State Mus., 1909, 718, 1910. 



Obiqinai. Description op Cttlex abfitchii: 



Larvae of this species were taken in some numbers at Karner N. Y. in early May, 

 In association with those of C. f i t c h i 1, which latter they closely resemble in gen- 

 eral form and structure but may be separated therefrom by the one or two isolated 

 pecten teeth on the air tube, and by the large apical spine of the comb scales being 

 from one half to two thirds the length of the entire structure. This is the larva 

 which Messrs Dyar and Knab consider the normal form of Culex cantans Melg. 

 (Ent. Soc. Wash. Proc. 6: 143). This species proved diflScult to rear, though a num- 

 ber of larvae were obtained. 



Obioinal Desceiption or Culex siphonalis: 



$. Head brown, occiput covered with pale yellow scales; antennae brown, basal 

 joint and two following ones testaceous; proboscis pale brown, with dark brown 

 scales scattered over the surface, covering the apical fourth; palpi dark brown, 

 with minute terminal joint oval in form, pointed at the apex and slightly spiny. 

 Mesonotum covered with pale yellow and brown scales at the sides and with a 

 median vitta wholly of brown scales, the pale yellow scales sometimes forming a 

 narrow border to this vitta; scutellum brown, with yellowish-brown bristles on the 

 posterior margin; metanotum evenly brown; pleura brown, clothed with patches of 

 dirty white scales; halteres yellowish-white, black at the apex. Abdomen blackish- 

 brown, with pale yellowish basal bands and extremely narrow apical ones on the 

 posterior three segments, Irregularly merging into the brown, becoming diffused 

 at the sides until beneath are mixed brown and white scales, the latter predominat- 

 ing. Legs with coxae yellowish-white; femora with mixed black and white scales, 

 wholly yellowish beneath and with a white dot at the knee; tibiae blackish-brown, 

 sprinkled with whitish scales; tarsi black, except the first tarsal joint, this like the 

 tibiae, narrowly white banded at the base in the anterior and mid feet, save the 

 fifth joint in the anterior one, posterior feet broadly white banded basally; claws 

 slender, unlserrated; wings hyaline, petiole of first submarginal cell about half as 

 long as this cell. Length, 5 mm. 



t?. — Palpi brownish, with a pale band in the centre of the basal joint and at the 

 base of the two terminal joints. Claws all unlserrated. The bands of the abdomen 

 very broad, mixed with brown scales and tending to cover the entire surface In the 

 apical segments. Petiole of first submarginal cell almost as long as this cell. 

 Length, 6 mm. Otherwise as in the female. 



