INSECUTOR INSCITIJE MENSTRUUS 89 



Cjccurred in beach pools filled by high waves and seepage 

 through the gravel, in marsh pools, but only very rarely in the 

 vlear cold mountain pools or the larger grassy marshes. The 

 larvae linger after the early snow-pool species have completely 

 disappeared. 



The following records also doubtless appertain to this spe- 

 cies: Glenbrook, Nevada, August 25, 1915 (H. G. Dyar) ; Ta- 

 hoe Tavern, Placer County, California, August 15, 1915 (H. 

 G. Dyar) ; Eureka, California, May 33 to June 6, 1903 (H. S. 

 Barber) ; Fieldbrook, California, May 36, 1903 (H. S. Bar- 

 ber). 



Aedes palustris, new species. 



Male. — Integument black. Head with flat yellowish white 

 scales on the sides, narrow curved ones above, smaller, sparser, 

 brown scales in a patch each side of vertex, the erect forked 

 scales black in these patches, elsewhere white ; median groove 

 bare, with dense whitish scales on either side ; vertical bristles 

 whitish, those along ocular margins black. Mesonotum with 

 narrow curved pale yellowish scales, narrower brown ones in 

 two broad contiguous bands and two posterior short subdorsal 

 stripes, the pale normal scales forming only subdorsal and lat- 

 teral lines and a border around antescutellar space. Abdomen 

 black, with broad, even, basal segmental white bands ; venter 

 with subapical black bands and a medioventral black line. Legs 

 black ; femora and tibiae with white scales intermixed, the fem- 

 ora white beneath ; tarsi with broad white rings at the bases 

 of the joints, on the first three joints on front and mid legs, 

 on all five joints on hind legs. Length of wing, 4.5 mm., the 

 scales black except a few white ones along costa, first and 

 fourth veins. 



Genitalia : Side pieces over three times as long as wide, 

 rounded at tip ; apical lobe long, arm-shaped, with a few short 

 setae ; basal lobe large, obtusely conical, densely setose. Har- 

 pagones moderate, the basal part of shaft minutely pilose, apical 

 part smooth ; filament sickle-shaped, without expansion. 



Female. — Similar ; mesonotum witli rather broad areas of 



