8 KHYNOHITID^. [LeUonte. 



by the broader, shorter, and more deeply sculptured beak. No sexual dif- 

 ferences observed. 



0. R. planifrons n. sp. 



Moderately elongate, dark blue, clothed with long erect hair. Beak 

 slender, as long as the head and prothorax, sparsely coarsely punctured, 

 striate in front of the antennae, flattened behind them, and margined at the 

 sides. Head coarsely punctured, frontal channel short, deep. Prothorax 

 slightly narrowed in front, not rounded on the sides, sparsely punctured, 

 feebly channeled. Elytra one-half wider than the prothorax, impressed 

 behind the base, striae composed of very large distjtnt punctures, inter- 

 spaces rather wide, each Avith a row of small but deep punctures. Length 

 3.5 mm's ; .14 inch. 



Cape San Lucas, Mr. Xantus. I have seen but one specimen. It is nearly 

 of the same form as B. mexicanics but a little less robust. 



7. R. aureus, n. sp. 



Elongate, glabrous, bright coppery golden. Beak rather slender, punc- 

 tured ; head coarsely and deeply punctured, with a narrow smooth frontal 

 space which is channeled. Antennae slender, testaceous with blackish 

 club. Prothorax longer than wide, sides very slightly rounded, coarsely 

 and deeply punctured. Elytra one-third wider than prothorax, impressed 

 behind the base, striae composed of deep close-set punctures, interspaces 

 narrow, sparsely rugose. Legs bright testaceous yellow. Length 2.3 mm's; 

 .09 inch. 



Santa Barbara, California. Abundant, Mr. G. R. Crotch. The beak 

 seems a little shorter and broader in some specimens, which are probably 

 $ ; otherwise I perceive no sexual differences. 



8. R. fossifrons, n. sp. 



Elongate, glabrous, bronzed ; legs dark. Beak slender, as long as the 

 head and prothorax, cylindrical, shining, sparsely punctured ; head coarsely 

 but not densely punctured, with a deep elongate fovea on the front. Pro- 

 thorax strongly punctured, not narrowed in front, very slightly rounded 

 on the sides. Elytra one-third wider than the prothorax, impressed behind 

 the base, striae composed of deep approximate punctures, interspaces nar- 

 row, rugose. Length 2.3 mm's ; .09 inch. 



One specimen, Mariposa ; Dr. A. Thevenet. Of the same form and size 

 as the preceding, but differing by the beak, frontal fovea, more rugose elytra 

 and dark legs. 



9. R. cyanellus, n. sp. 



Of tlie same form, size and sculpture as the two preceding, but of a dark 

 blackish blue color. Beak slender somewhat flattened, strongly punctured ; 

 head strongly and sparsely punctured, without frontal fovea. Prothorax 

 and elytra as in E. fossifrons. Length 2.1 mm's ; .085 inch. 



Massachusetts and Illinois ; four specimens. The subbasal impression 

 of the elytra is less distinct than in the next species, and the general form 

 more elongated. 



