AMERICAN COMPONENTS OF THE TENTYRIIN^IC 447 



epistomal lobe is triangular and its sides are obtusely pectinate, 

 somewhat as in the subgenus Pimalms of the Trimytini, 

 although there the lobe is approximately semicircular. The 

 prothorax is of peculiar cylindric form, rectilinearly truncate 

 from side to side anteriorly and very broadly and feebly lobed 

 at base, none of the angles being in the least prominent although 

 not rounded. The elytra have the elevated basal margin and 

 scutellum of the preceding genera, but the epipleurae are narrow 

 posteriori}', becoming gradually rather wide toward base, the 

 met-episterna moderately narrow, becoming broader anteriorly, 

 the legs rather short and stout, strongly punctate, the tibiae with 

 two external carinas separated by a longitudinal groove, and the 

 rather short thick tarsi are densely pubescent, the basal joint of 

 the posterior less elongate than usual and somewhat shorter than 

 the fourth. The genus is peculiar to the warm southern part of 

 the peninsula of Lower California, the two species thus far 

 known being definable as follows : — 



Form elongate-subcylindric, the hind body moderately inflated, brown- 

 ish-testaceous in color throughout, alutaceous in lustre, glabrous, 

 each puncture with a very small and scarcely visible hair entirely 

 within its limits; head coarsely, densely and subconfluently punc- 

 tate, the antenn.-n slender, rather longer than the head and pro- 

 thorax, the latter a fourth wider than long, with the base just 

 visibly wider than the apex, the sides nearly straight, the sides 

 and base beaded, the apical angles right, the basal slightly obtuse ; 

 surface cylindrically convex, very coarsely and subconfluently 

 punctate, scarcely more coarsely so laterally; scutellum well 

 developed, transverse, forming part of the raised elytral base; 

 elytra nearly one-half longer than wide, oblong-oval, less than three 

 times as long as the prothorax and, at the middle, about one-half 

 wider, with nine discal, apically impressed, entire and regular 

 series of very coarse, perforate and rather widely spaced punc- 

 tures ; abdomen coarsely and very deeply but somewhat sparsely 

 punctate. Length 7.0 mm. ; width 3.12 mm. Lower California. 



perforatus Lee. 



Form rather more slender, smaller in size, the hind body more 

 abruptly but not more strongly inflated, piceous-black, the legs 

 and antennae dark rufous ; surface rather shining and with dis- 

 tinct but sparse vestiture of short, suberect, somewhat coarse 

 fulvous hairs; head coarsely, very densely punctato-strigose 

 throughout, the antennae much shorter, not as long as the head 

 and prothorax, the latter more than a fourth wider than long, 

 distinctly wider than the head, with the apex and base equal in 



