268 



REVISION OF T11K TKNEBRIONID/E OK AMERICA, 



E. bioolor, elongate oval, convex, head and thorax brownish ferruginous, remainder of body black. Head 

 densely and coarsely punctured, more sparsely near the occiput. Thorax transverse, one-half broader than long, 

 slightly narrower in front, densely and coarsely and at the sides conlluently punctured; anteriorly feebly emarginate 

 angles not prominent; posteriorly bisinuate angles acute, moderately prominent; sides broadly rounded from the base 

 to apex. Elytra black, oval, closely aciculately punctured in striae, interstices more finely punctured. Prostornum 

 very coarsely and continently punctured, pectus and abdomen coarsely and moderately densely punctured, legs and 

 antennae ferruginous. Length .26 inch. 



Quite distinct from convexicollc by the characters above given. The hind angles are 

 more acute and prominent than in any other of our species. Specimens rarely occur in 

 which the entire color is black. It is also more robust than the: species already referred to. 



E. p u uc tula turn, Lee, N. Spec, 300, p. 105. 



One of the most singular species of the genus in several characters. The penultimate 

 abdominal segment in the male is short and broadly emarginate, as in the other species. 

 The same segment in the female has a deep emargination each side of the middle, leaving 

 a central acute tooth or lobe extending to the middle of the last segment. In this and 

 the following species the line of the front is not continuous. On each side of the front at 

 the termination of the supraorbital ridge, is a slight notch, being in this genus the last 

 trace of the trilobed front seen in all the preceding genera. 



Length .27 inch. 



E. sodalis, alate, brown, scarcely shining, elongate oval, head coarsely and densely, thorax less densely punc- 

 tured. Thorax broader than long, sides broadly rounded, scarcely narrower in front, angles obtuse. Elytra aciculately 

 punctured in distinct stria;. Beneath very sparsely punctured. Feet, palpi, antennas and margin of front paler. 

 Length .22~.24 inch. 



Not rare in Owens' Valley, and occasionally found at Fort Yuma, California. 



Differs from the preceding in having the sides of the thorax regularly rounded, scarcely 

 rounded anteriorly, and by the anterior angles being obtuse, as well as in the absence of 

 the peculiar sexual characters of the preceding. 



E. serr a turn, Lee, N. S. 867, p. 10G. 



This species has the anterior tibiae distinctly and, for its size, strongly serrate. 

 Length .12 inch. 



E. ochraceum, Esch., loc. cit. 



Is unknown to mc. I suspect it to be an immature specimen of ccmvexicolle, 1 joc. 



EMMENASTUS, Motsch, (emend. Leo.) 

 Emmenastus, Motsch., Bull. Mosc. 1845, 1, 75. 



Regarding this genus there may yet be room for some doubt. Manncrhcim states 

 that E. rugosus, Motsch., the type of the genus, is merely a specimen of Blapstinus pul- 

 verulentus, while in the cabinet of Dr. Lecontc a specimen of Ooniontls subjpubescene bears 



