40 Coleopterological Notices, III. 



of the Heteromera, and I have alluded to it before under the genus 

 Blapstinus (Ann. N. Y. Acad., Y, p. 418). It is probable that this 

 fact has a more far-reaching import than may be apparent to us at 

 present. 



The antennas of the male have, on the side at the apex of each 

 of the outer joints, a large elongate-oval depressed area which is 

 glabrous, but over which there are generally scattered a very few 

 coarse spinose setae. These sensory depressions are usually much 

 less developed in the female than in the male, and are sometimes 

 almost obsolete in that sex ; they vary slightly in form and depth 

 in the various species. 



I take the present occasion to call attention to a species allied to 

 sexnotata, which may be described as follows from the female : — 



S. men tana n. sp. — Moderately robust, rather dull and alutaceous in 

 lustre, pale rufo-testaceous throughout, the tarsi and three or four terminal 

 joints of the antennae picescent ; elytra each with three black spots arranged 

 as in sexnotata; pubescence rather short, coarse and sparse. Head finely, very 

 densely punctate, a posteriorly angulate area immediately behind the epistoma 

 impunctate and highly polished ; epistoma and labrum finely, sparsely punc- 

 tate and shining ; antenna? (female) two-thirds as long as the body, stout, 

 cylindrical, the joints compactly joined toward apex and without trace of 

 sensitive apical areas, third joint one-half longer than the fourth. Prothorax 

 fully as long as the basal width, finely, strongly constricted just behind the 

 apex, the latter truncate and less than one-half as wide as the base, the latter 

 broadly bisinuate ; basal angles laterally produced, acute and prominent ; 

 sides broadly sinuate toward base ; disk immaculate, evenly convex, rather 

 coarsely and sparsely punctate. Elytra at the humeri quite distinctly wider 

 than the prothorax, nearly three times as long as wide, the sides strongly 

 convergent from the rounded humeri to the apex ; each elytron truncate at 

 apex, the truncation but slightly oblique ; disk rather coarsely, sparsely 

 punctate. Under surface finely, sparsely punctate and pubescent. Length 

 12.5 mm. ; width 3.5 mm. 



New Mexico (Las Yegas). Mr. Meeske. 



Immediately distinguishable from the female of sexnotata by the 

 truncate apices of the elytra, and stouter antennas ; the antennae 

 and greater part of the legs are black in sexnotata, but two speci- 

 mens before me from Texas seem to indicate that they may occa- 

 sionally become pale throughout, this not being a character of great 

 importance. The elytra toward apex are much less dehiscent in 

 montana than in sexnotata, and the surface in the former is less 

 shining and more finely punctate. 



