74 Transactions of the Royal Canadian Institute 



2. Abdomen with apical segmental white bands, testaceus van der Wulp 



Abdomen with basal segmental white banfis 3 



Abdomen without white bands dorsally melanurus Coquillett 



3. Band at base of second abdominal segment triangular or triangularly 



produced pipiens Linnaeus 



This band transverse, not mesially produced territans Wjalker 



CtJLEX (CuLEx) TARSALis Coquillett. 



Cidex tarsalis Coquillett, Can. Ent., xxviii, 43, 1896. 

 CmUx willistoni Giles, Handb. Gnats or Mosq., 281, 1900. 

 Ctilex affinis Adams, Kans. Univ. Bull., ii, 25, 1903. 

 Culex kelloggii Theobald, Can. Ent., xxxv, 211, 1903. 

 Culex pens Speiser, Insektenb5rse, xxi, 148, 1904. 



A medium sized mosquito, the mesonotum bronzy -brown scaled, 

 frequently ornamented with narrow silvery white lines each side of the 

 posterior portion, running back to the scutellum. The abdomen is 

 blackish or browb, w;ith moderate basal segmiental white bands, the one 

 on the basal segment triatigular; venter whitish scaled, with angular 

 transverse black bands, which form cusps directed posteriorly. Proboscis 

 dark, with a white ring near the middle. Legs brown, the femora white 

 beneath, the tarsi with white rings at both ends of the joints, small on 

 front arfed middle legs, distinct on the hind pair; a white line on the outer 

 side of femora and tibiae. Wing-scales wholly dark, fine and hair-like, 

 forming a little tuft at the base of the third vein. 



The male genitalia have the second uncal plate large and furnished 

 with denticles. The lobe of the side piece has three rods, a seta, a leaf and 

 a seta. 



The larvae are commonly found in grassy ponds or marshes, often in 

 escaped irrigation water. They do not take to artificial receptacles. 



This mosquito will enter houses and maV become a coinsiderable 

 nuisance in the western part of the country. 



Distribution: Mississippi Valley and western prairies to the Pacific 

 Ocean, Mexico to British Columbia^ 



Canadian Records. 



Saskatoon, Saskatchewan, August 12, 19 18 (H. G. Dyar). 

 Mission, British Columbia, August, 1919 (E. Hearle). 

 Wellington, British Columbia, August 8, 1906 (Dyar & Caudell). 

 Royal Oak, British Cblumbia, April, 19 17 (R. C. TreheaVne). 

 Chilliwack, British Columbia, July 3, 1919 (E. Hearle). 

 Harrison, British Cblumbia, June 20, 1919 (E. Hearle). 



