282 MEMOIRS ON THE COLEOPTERA 



at the sides, similarly subcircular at apex, only a fourth wider than the 

 prothorax; striae even finer, the intervals nearly flat; discal puncture 

 at apical fifth; male with the anterior tarsi rather strongly dilated, 

 the intermediate slender, scarcely at all dilated, the difference being 

 more pronounced than in either of the preceding. Length (cf 9 ) 

 3.2-3.6 mm.; width 1.2-1.35 mm. Arizona (probably southern). 

 Three examples moquinus n. sp. 



Form oblong-suboval, rather more depressed, shining; head deep black; 

 prothorax throughout above and beneath clear rufous; elytra black, 

 feebly pallescent toward the humeri, the suture seldom noticeably 

 pale; under surface of the hind body black, the epipleura and legs 

 very pale; head rather small, not quite three-fifths as wide as the 

 prothorax; antennae slender, fuscous, with the two basal joints pale, 

 fully half as long as the body; prothorax differing greatly from the 

 three preceding, larger, widest before the middle, the sides broadly 

 and rather strongly rounded, less so basally; apex distinctly sinuate, 

 with rather blunt angles and not quite as wide as the base, the basal 

 angles broadly rounded; surface nearly as in conjunctus, the disk 

 two-fifths to nearly one-half wider than long; elytra less than one- 

 half longer than wide, only a fifth or sixth wider than the prothorax 

 and two and one-half times as long, the sides rather strongly arcuate; 

 apex circularly rounded, without trace of sinus; striae very fine, the 

 lateral ones subobsolete basally, the discal puncture at apical fourth 

 to fifth ; male with the anterior tarsi strongly, the intermediate feebly, 

 dilated. Length (c? 9 ) 3.4-3.8 mm.; width 1.2-1.4 mm. Iowa 

 (Keokuk) and Missouri (St. Louis). Eight specimens. 



thoracicus n. sp. 



27 Bod>- elongate, suboval, rather convex, very shining, piceous-black, 

 the elytra broadly and indefinitely toward the sides, and the suture, 

 rufescent; margins of the pronotum, a little more widely at apex and 

 base, pallescent; under surface blackish-piceous throughout, the 

 epipleura dull rufous, the legs testaceous; head rather small, less 

 than three-fifths as wide as the prothorax, the eyes well developed 

 and prominent; antennae slender, dark in color with pale base, much 

 less than half as long as the body; prothorax only a third wider than 

 long, perfectly parallel, with very evenly and strongly rounded sides; 

 apex feebly sinuate, with well marked angles and equal in width to 

 the base, the basal angles very broadly rounded; surface almost even 

 throughout, rather convex, the stria very fine, the foveae impunctate, 

 often represented, as in the preceding four species, by a feeble punc- 

 ture at a considerable distance from the base; elytra not quite 

 one-half longer than wide, a third to fourth wider than the prothorax, 

 parallel, with arcuate sides and circularly rounded apex, the sinus 

 obsolete; striae not very fine, distinctly impressed and with notably 

 convex intervals suturad, almost obsolete and with flat intervals 

 on the flanks, the puncture at apical fourth. Length (9) 3.8-4.0 

 mm.; width 1.35-1.4 mm. Texas (Galveston). Louisiana, Le- 

 Conte. Two examples rotundatus Lee. 



Body elongate-suboval, convex, more parallel than the preceding, rather 

 deep black throughout, the margins of the pronotum finely, dia- 



