638 MOSQUITOES OF NORTH AMERICA 



deposit about the margin. It is not improbable that they are frequent inhabi- 

 tants of alkaline pools in the arid regions. 



Semi-arid regions of western United States and Canada. 



Thrall, California, July 25, 1906 (Dyar and Caudell) ; Mies, California, 

 August 31, 1901 (S. C. Jones) ; Stockton, California (H. J. Quayle) ; Salt 

 Lake, Utah, June 36 (H. S. Barber) ; Kaslo, British Columbia, June 21, 1903 

 (H. G. Dyar) ; Market Lake, Idaho, June 18, 1901 (J. M. Aldrich) ; Lehi, 

 Utah, September 9, 1905 (W. A. Hooker) ; Grand Junction, Utah, September 

 11, 1905 (W. A. Hooker) ; Grand Junction, Colorado, July 21, 1906 (E. P. 

 Taylor) ; Florissant, Colorado, July 10, 1907 (S. A. Eohwer) ; Boise, Idaho 

 (C. B. Simpson) ; University, North Dakota, June, 1896 (E. P.'Currie) ; Fort 

 Lincoln, North Dakota (through C. S. Ludlow) ; Blackfoot, Idaho, June 12, 

 1904 (E. S. G. Titus) ; Kockyford, Idaho, June 10, 1904 (E. S. G. Titus) ; 

 Klamath Falls, Oregon, July 27, 1906 (Dyar and Caudell) ; Pecos, New Mexico, 

 June 24 (T. D. A. Cockerell) ; Elsinore, Utah, August 6, 1907 (E. S. G. 

 Titus) ; Bozeman, Montana, August 29, 1908 (E. A. Cooley) ; Billings, Mon- 

 tana, August 22, 1908 (E. A. Cooley) ; Dillon, Montana, August 5, 1908 (E. A. 

 Cooley) ; Bigtimber, Montana, August 25, 1908 (E. A. Cooley) ; Joliet, Mon- 

 tana., August 23, 1908 (E. A. Cooley) ; Meadow Creek, Montana, August 5, 1908 

 (E. A. Cooley) ; Eeno, Nevada, July 20, August 17 to October 17, 1915 (H. G. 

 Dyar) ; Steamboat Springs, Nevada, July 31, August 19, 1915 (H. G. Dyar) ; 

 Madison, Wisconsin (S. J. Holmes) ; Qu'Appelle, Saskatchewan, June 22, 

 1907 (T. N. Willing) ; Oxbow, SaskatchcAvan, May 21, 1907 (F. Knab) ; Carn- 

 duff, Saskatchewan, May 27, 1907 (F. Knab) ; Winnipeg, Manitoba, June 22, 

 1907 (F. Knab) ; Lincoln, Nebraska, May (0. A, Johannsen) ; Chicago, Illinois, 

 May 4, 1900 (0. A. Johannsen). 



Aedes curriei is extremely variable in coloration. The predominating vesti- 

 ture of the occiput and mesonotum varies from nearly pure white through pale 

 yellow and ocherous to brownish yellow. The brown thoracic stripes may be 

 well defined or diffused and likewise vary greatly in depth of color and extent. 

 The median stripe usually stops short before the antescutellar space, but in some 

 specimens it is continued in three or more slender lines to the scutellum. The 

 abdominal markings vary from slight borderings of white scales on the seg- 

 ments to a complete covering of such scales ; the most abundant and character- 

 istic form is that with a median area of white scales, thus producing a pair of 

 black spots on each segment. The amount of white scales on the wings likewise 

 varies and these scales may predominate on all the veins. There is no constant 

 colorational character to separate this species as adult from Aedes onondagensis, 

 and the larvae, too, are much alike, differing chiefly in the head-hairs and the 

 structure of the comb-scales; the genitalia, also, are not diagnostic. Onon- 

 dagensis breeds in salt-water pools, curriei inhabits temporary pools throughout 

 the arid regions. 



For the relationships and questions of possible synonymy our discussion under 

 Aedes onondagensis should be consulted. Aedes curriei was described as a 

 species distinct from the European Aedes dorsalis (Meigen) under the impres- 

 sion that the structure of the hind claws of the female differed, but it now 

 appears that both are alike in this respect. Doctor Ludlow has placed a type of 

 her mediolineata in the U. S. National Museum. It is the form of curriei with 

 the abdominal pale markings very narrow. 



AEDES ATROPALPUS (Coquillett) Dyar & Knab. 



Culex atropalpus Coquillett, Can. Ent., xxxiv, 292, 1902. 



Culex atropalpus Dyar, Journ. N. Y. Ent. Soc, x, 195, 1902. 



Culex atropalpus Smith, Ent. News, xiii, 301, 1902. 



Culex atropalpus Dyar, Proc. Ent. Soc. Wash., v, 144, pi. ii, f. 10, 1903. 



Ciilex atropalpus Dyar, Ent. News, xiv, 180, 1903. 



