430 Goleopterological Notices, V. 



tate ; antennae much shorter than the head and prothorax, moderately in- 

 crassate. Prothorax large, subrectangalar, one-third wider than long ; sides 

 subparallel, very feebly arcuate, a little more convergent anteriorly ; base 

 distinctly wider than the apex ; basal angles slightly obtuse and blunt ; disk 

 strongly, evenly convex, minutely but strongly, evenly, rather sparsely 

 punctate, very feebly impressed near the sides behind the middle and also 

 extremely obsoletely and narrowly along the median line. EUjtra rather 

 longer than wide, twice as long as the prothorax, and, near the apex, almost 

 one-third wider ; sides feebly divergent, nearly straight ; humeri not exposed ; 

 apex broadly, evenly arcuate throughout the width ; disk rather finely but 

 strongly, confusedly and closely punctate. Abdomen with about four exposed 

 segments. Length 1.8-2.1 mm.; width 1.0-1.1 mm. 



Arizona. 



The description is taken from the male, in which sex the sixth 

 ventral is abruptly thickened and transversely more convex in the 

 middle, with the very short apex of the segment beyond thinned 

 and transparent, and the apical margin of the thickened part bearing 

 long stiff setas ; the anterior tibiae are widest and obtusely prominent 

 within at the middle, thence rapidly narrowed to the base and 

 broadly sinuate to the apex. The female is quite different, the 

 prothorax being very much shorter and more transverse as in 

 diversicolle, and the elytra larger, fully three times as long as the 

 prothorax, covering the entire abdomen, with the sutural angles 

 very strongly and abruptly prolonged behind. Six specimens. 



A. Sllliailglllatllin. — Robust, subparallel, convex, rufo-testaceous and 

 polished throughout, the abdomen black. Head large, four-fifths as wide as 

 the prothorax, nearly as long as wide, scarcely at all impressed, finely but 

 strongly, rather closely punctate; ocelli all but completely obsolete; eyes 

 smaller than usual, the terapora distinct behind them ; antennae longer than 

 usual, longer than the head and prothorax, sixth joint longer than wide, not 

 wider than the preceding, seven to elevbn forming a long loose five-jointed 

 club, tenth but slightly wider than long. Prothorax transverse, fully four- 

 fifths wider than long; apex truncate, fully as wide as the base; sides very 

 broadly subangulate just behind the middle, thence feebly convergent and 

 nearly straight to the distinct but rounded apical angles, more convergent and 

 somewhat sinuate to the base, the basal angles obtuse and blunt; disk rather 

 coarsely deeply and closely punctate, just visibly impressed before the scutel- 

 lum and strongly so along the sides behind the middle. Elytra about as long 

 as wide, near the apex slightly wider than the prothorax, more than twice as 

 long ; sides just visibly divergent, nearly straight ; humeri slightly exposed ; 

 apex broadly, evenly subtruncate ; punctures distinct, deep, subequal to those 

 of the pronotnm and rather less approximate, confused. Abdomen with about 

 three exposed segments. Length 2.3-3.0 mm. ; width 1.0-1.25 mm. 



