2io MEMOIRS ox THE COLEOPTERA 



2 Elytra without pronounced greenish metallic lustre, even ia the male . 3 



Elytra with greenish metallic lustre, at least in the male 8 



3 Body uniformly piceous or black in color when mature 4 



Body pale testaceous, the elytra piceous-brown 7 



4 Species of the Atlantic and Gulf regions 5 



Species of the Sonoran regions 6 



5 Form rather stout, oblong-suboval, only modeiately convex, piceous- 

 black, the legs more or less pale rufous; lustre very strongly shining, 

 the elytra not evidently alutaceous even in the female, though the 

 micro-reticulation is feebly evident in both sexes; basal and lateral 

 parts of the pronotum diaphanously paler; head about half as wide as 

 the prothorax, with notably prominent eyes, the antennae slender 

 pale testaceous, the fovese very small; prothorax transverse, three- 

 fifths wider than long, the sides broadly and almost evenly arcuate, 

 gradually converging anteriorly from behind the middle; apex very 

 feebly sinuate, three-fourths as wide as the base, which is transverse 

 throughout, with the angles slightly obtuse, having the tips narrowly 

 blunt; surface very smooth, impunctate, narrowly deplanate at the 

 sides, rapidly more widely posteriorly, curving inward and disappear- 

 ing near basal third, the foveae elongate, broadly sublinear and feebly 

 impressed, sometimes with excessively minute and sparse surround- 

 ing punctulation; elytra one-half longer than wide, just visibly wider 

 than the prothorax, feebly arcuate at the sides, gradually sharply 

 ogival behind, the sinus very oblique, long and extremely feeble; 

 striae fine, the intervals nearly flat, the discal puncture near pos- 

 terior fifth; basal joint of the hind tarsi unusually short, not as 

 long as the next two combined and about as long as the fifth. Length 

 (cf 9 ) 9.5-10.8 mm.; width 3.8-4.2 mm. District of Columbia. 



[Anisodactylus sayi Blatch.]. . . . '. piceus Lee. 



Form much more abbreviated, rather more convex and smaller in size, 

 deeper black, piceous beneath, the entire legs and slender antennae 

 pale testaceous; sides of the pronotum only feebly diaphanous at the 

 edges; lustre shining, the elytra (9) scarcely at all duller; head 

 barely more than half as wide as the prothorax, with moderate but 

 prominent eyes and extremely minute punctiform fovese, lying within 

 feeble vague impressions; prothorax one-half wider than long, the 

 c ides subevenly and rather strongly arcuate; apex feebly sinuate, 

 with broadly rounded angles and much narrower than the base, 

 which is transverse, with the angles rather broadly obtuse but only 

 blunt at the tips; surface throughout nearly as in piceus, except 

 that the foveae are broader, still more feeble and very vague, the 

 stria excessively fine, incomplete; elytra unusually short, only about 

 two-fifths longer than wide, oblong, with rather strongly arcuate 

 sides and rapidly obtusely ogival apex, fully a fifth wider than the 

 prothorax, the sinus feeble but distinct; striae fine, somewhat im- 

 pressed, the intervals feebly convex in both sexes, the puncture at 

 apical fifth; hind tarsi very slender, the basal joint as long as the 

 next two and slightly longer than the fifth. Length (cf 9 ) 8.8-9.0 

 mm.; width 3.7-3.8 mm. Texas (Galveston). Five examples. 



convexulus n. sp. 



