56 MEMOIRS ON THE COLEOPTERA 



rufous, always shaded with piceous-black medially, the frontal 

 impressions shorter, feeble; prothorax nearly similar, except that 

 the coarse lateral gutter expands much less basally; elytra similar in 

 structure but barely a fifth longer than wide and more abruptly and 

 broadly obtuse at apex, differing in the very strongly impressed 

 striae and notably convex intervals, the large impressed punctures 

 very much more numerous, generally confused over the entire width 

 of the third interval posteriorly, the punctures of the even intervals 

 few in number and often wanting; tarsi of the female a little more 

 slender than in the male as usual. Length (cf 9 ) 11.8-12.8 mm.; 



width 5.5-6.0 mm. Colorado. Three examples obtusus n. sp. 



Elytra distinctly elongate, the serial punctures fewer in number, smaller, 



more regular and less impressed 3 



3 Body larger in size and broader though not so broad as in miens, 

 generally rufo-piceous in color, the elytra more gradually rounded 

 and obtuse at apex than in obtusus; head nearly as in valens but much 

 smaller, the labrum generally blackish; prothorax nearly as in 

 obtusus; elytra a third longer than wide, the striae fine and usually 

 feebly impressed, the punctures of the alternate intervals small, 

 rather regularly serial but very widely and unevenly spaced. Length 

 (cf 9 ) 11.0-14.5 rnm.; width 5.0-6.7 mm. Texas (El Paso) and 

 Colorado. Four examples. [Euryderus zabroides Lee.]. 



zabroides Lee. 



A Similar to zabroides but more broadly oblong and deep black in 

 color, the striae similar, the punctures of the alternate intervals 

 very few in number, on the third three to five and situated only 

 in apical third, on the fifth three or four in apical third only, 

 although there is a single isolated puncture on the left elytron at 

 basal fourth in the type, the seventh with three or four confined 

 to apical half; under surface a-nd legs black or piceous-black. 

 Length (cf ) 13.0 mm.; width 6.25 mm. Texas (El Paso). 



privatus n. subsp. 



Body smaller and especially narrower than in any other species and with 

 slightly shorter though otherwise similar tarsi, deep black in color, 

 the under surface and legs rufo-piceous, the antennae pale, the labrum 

 piceo-castaneous; head as in the other species but with the frontal 

 impressions small, punctiform, at the anterior end of very feeble 

 vague impressions of the surface; prothorax as in obtusus but with 

 the scattered punctures toward base and apex finer and less numerous, 

 sometimes wholly wanting apically, the series of about three coarse 

 setigerous lateral foveae in the marginal depression more distinct 

 than in the other species, owning to the subobsolete ground sculpture; 

 elytra two-fifths longer than wide, not quite three times as long as 

 the prothorax, the striae fine, rather feebly impressed, with nearly 

 flat intervals, the punctures of 3-5-7 numerous, twelve to fifteen 

 in number, extending from apex to base and not evenly serial but 

 notably irregular, the even intervals also with a few punctuies 

 apically. Length (cf 9 ) 11.5-11.8 mm.; width 5.0-5.2 mm. Ari- 

 zona arizonicus n. sp. 



