Coleople7'ologicaI Notices, III. 4V 



parallel, distinctly wider than the head and prothorax, and a little more than 

 twice as long as wide ; humeri right and rather prominent ; apex evenly 

 rounded ; disk coarsely punctate, the punctures not quite in mutual contact, 

 and, between the fascia and extreme apex, becoming very sparse. Under 

 surface finely, densely punctate throughout and finely, inconspicuously pubes- 

 cent. Ze^s moderate ; tarsi short and stout. Length 4.5 mm, ; width 1.2 mm. 



New Mexico ? 



A single representative, the habitat of which is somewhat doubt- 

 ful. The species is easily distinguishable from supernolatus by the 

 characters given in the table. The basal tubercles of the elytra, so 

 distinct in superyiotatus, are barely perceptible in tristU as broad 

 and feeble swellings of the surface. 



MOIVOCHAMUS Serv. 



M. obtlisiis n. sp. — Stout, subparallel, moderately convex, brown 

 throughout and marmorate nearly as in titiUntor. Head deeply angularly 

 impressed between the antenufe ; front shining, sparsely pubescent, finely, 

 sparsely and unevenly punctate ; antennae (male) two-thirds longer than the 

 body, slender, not at all annulate, (female) but slightly longer than the body, 

 distinctly annulate. Prothorax slightly wider than long, the lateral spines 

 well developed ; disk shining, coarsely, confluently punctate, transversely 

 rugulose anteriorly, with an oblong impunctate median area ; pubescence 

 moderately conspicuous, feebly and minutely marmorate laterally, with two 

 distant, discal spots before the middle. Scutellum glabrous, pubescent at 

 base especially toward the sides. Ehjtra scarcely more than twice as long as 

 wide, parallel in basal half in the male and basal two-thirds in the female, at 

 base distinctly wider than the prothorax, the apices individually rounded, 

 broadly so in the female, a little less broadly in the male ; disk very coarsely 

 punctato-rugulose toward base, sparsely and more finely punctate thence to 

 the apex. Abdomen densely pubescent, the pubescence whitish and finely, 

 unevenly marmorate or nucleated. Legs rather short and moderately slender. 

 Length 13.0-19.0 mm. ; width 4.7-6.8 mm. 



California. 



This species is not at all closely related to any other hitherto 

 described. In general it resembles titillator, but is smaller, shorter 

 and broader, with the apical angles of the elytra l)roadly rounded 

 even in the males. In the recent table given by Dr. Horn it may 

 be placed between scutellatus and confusor. The scutellum, which 

 is pubescent only toward the sides of the base, will readily serve to 

 distinguish it from any other of our species, and from oregonensis 

 it may be known by its rounded elytral apices, scutellum and colora- 

 tion. It is represented before me by a good series of six specimens 

 collected near the northern boundary of the State. 



