64 Journal New York Entomologigal Society. [Vol. vl 



antennce pale flavate ; pubescence short, fine and moderately distinct. Head 

 rather short, inserted nearly to the eyes, which are well developed and very con- 

 vex ; surface moderately convex, dull and subscabrous ; antennae moderate in 

 length, the rami unusually short and gradually thickened from their bases, the 

 ramus of the fourth joint three times as long as the joint. Prothorax distinctly 

 shorter than wide, the outline broadly parabolic from the base continuously 

 around the apex, the sides becoming almost parallel near the base, which is- 

 broadly arcuate, finely margined toward the middle ; surface densely granulato- 

 scabrous, larger individual granules but slightly evident toward tip. Scutellum 

 longer than wide, dull, obtuse at tip as usual. Elytra three-fourths longer than 

 wide, twice as long at the prothorax and scarcely wider, the punctures equally 

 visible throughout, rather large but sparse and with but the vaguest suggestion 

 of lineal arrangement. Length 2.4 mm.; width 0.8 mm. California (Los- 

 Angeles Co. ) f lavipennis, sp. nov. 



The female in this genus generally has a short acute transverse ridge 

 near the apex of the last ventral segment, but in ramicornis the fifth seg- 

 ment is simple in that sex, having merely a very small and shallow im- 

 pression at the apex. The male usually has the fifth ventral simple or 

 slightly more convex at the apex, where it is broadly and evenly rounded. 



Acuminatus is represented before me by seven females varying greatly 



in size, and the male is apparently rare ; on the other hand ramicornis 



is represented by nine specimens, only two of which are females. Tho- 



racicus Rand., is not known to me at present and is therefore omitted 



from the table. 



Euceratocerus Lee. 



The fifth ventral segment is generally impressed in the female of Eu- 

 ceratocerus and is rather shorter than in the male, where it is simple. 

 The species are all elongate and subcylindrical, though rather less con- 

 vex than in Ptilinus, the head minutely and densely granulose, the pro- 

 thorax less minutely and very clearly and evenly granulate throughout 

 the disk, but rather more densely at the summit of the more convex 

 median parts near the base. The elytra have very fine, scarcely im- 

 pressed striae, which extend nearly to the apex in horni, and that species 

 is well distinguished from any of the California representatives by the 

 two basal impressions of the pronotum. The species are very much 

 more closely allied among themselves than those of Ptilinus, and the 

 male appears to be very rare in comparison with the female. The four 

 species in my cabinet may be identified as follows from the female : — 



Basal joint of the hind tarsi very much shorter than the entire remainder, the second 

 joint relatively more elongate ; pronotum impressed at each side near the basal 

 margin ; elytra more elongate ; eyes separated by rather less than three times 

 their own width. Texas horni Lec^ 



