THE CANADIAN ENTOMOLOGIST 137 



3 — Prothorax relatively small in size in both sexes, but little more than 

 half as wide as the elytra, very coarsely, closely and polygonaliy 

 punctate ~ 4 



Prothorax relatively larger, about two-thirds as wide as the elytra or very 

 nearly 7 



4. — Prothorax shorter, decidedly transverse, gradually broadening or 

 inflated basally and widest at or very near the base. Body very 

 small and moderately narrow, the elytra parallel ; head and beak, 

 except apically, clothed densely with large rounded scales, the anten- 

 nal club small, slender and without sutures, evenly clothed with 

 closely decumbent pubescence ; prothorax much narrower than the 

 elytra, with a dense crust of large rounded pale scales, replaced by 

 slender brown scales at each side of the middle basally ; elytra ob- 

 tusely rounded at apex, two-fifths longer than wide, blackish, very 

 deeply, moderately coarsely sulcate, the humeri well exposed and 

 subtransverse basally ; large whitish scales denser laterally and in a 

 rounded ring before the middle ; erect setae long and straight, un- 

 usually slender and only moderately numerous. Length, 1.2 mm.; 

 width, 0.6 mm. Texas (Alpine), Wickham puelius, n. sp. 



Prothorax parallel and broadly rounded at the sides as usual, narrowed 

 and constricted at apex. 5 



5 — Elytra unusually abbreviated, about a third longer than wide, the erect 

 setce less numerous and shorter than usual. Beak with a mixture of 

 short and lanceolate and broad scales laterally ; the scales broad, 

 dense and uniform on the head and median parts of the beak ; 

 prothorax slightly shorter than wide, with a mixture of large, rounded 

 and whitish and slender brown lanceolate scales, the former pre- 

 dominating medially and laterally ; elytra parallel, obtusely rounded 

 at apex, with rather widely exposed transverse humeri, the strise 

 unusually fine, moderately deep, the large pale scales dense along the 

 suture and rather close broadly before the middle ; dense scales of 

 the under surface large and white, uniform. Length, 1.05 mm.; 

 width, 0.48 mm. Southern California (without further indication of 

 locality) atomus n. sp. 



Elytra less abbreviated, two-fifths to nearly one-half longer than wide, the 

 erect setae long and very numerous, conspicuous * 6 



6 — Elytra about two-fifths longer than wide; very small in size, piceo- 

 rufous, the erect setee moderately long, finely pointed, not very broad, 



