382 MEMOIRS ON THE COLEOPTERA 



less distinctly narrower than the base and with the angles broadly 

 rounded, otherwise nearly as in rectus; elytra nearly similar, though 

 relatively broader, the seventh stria still finer and more nearly 

 obsolete except posteriorly. Length (cf) 11.5 mm.; width 4.0 



mm. District of Columbia, Ulke mandibularis n. subsp. 



B Form shorter and broader than in rectus, similar in coloration and 

 striation, the head notably smaller, but little more than half as 

 wide as the prolhorax, the mandibles as in rectus; prothorax rela- 

 tively not so large, a third wider than long, otherwise nearly simi- 

 lar, except that the hind angles are less obtuse, with the apices 

 only blunt and not distinctly rounded; elytra rather shorter, more 

 obtuse at apex but with deeper subapical sinus, similarly striate 

 and punctured. Length (cf) n.o mm.; width 4.3 mm. Texas 



(Galveston) laticollis Chd. 



Form less broad, more nearly as in lucens, black, the legs ferruginous; 

 elytral iridescence rather feeble; head moderate, longer, with longer 

 neck and rather prominent eyes, four-sevenths as wide as the pro- 

 thorax; mandibles faintly rufescent basally, the labrum, antennae 

 and palpi bright ferruginous; prothorax shorter, very nearly one-half 

 wider than long, the parallel sides very evenly and rather strongly 

 arcuate and finely reflexed from apex to the very obtuse and rather 

 rounded basal angles; base margined laterally, wider than the deeply 

 sinuate apex; foveae deeply depressed, not quite attaining the base, 

 the margination of the latter extending inward slightly beyond them; 

 elytra three-fifths longer than wide, more than a fourth wider than 

 the prothorax; striae rather coarse but not very deep, the punctures 

 not strong or very close-set and feebly crenulating the intervals, 

 which are only very moderately convex, the seventh stria feeble 

 basally; sinus rather short and distinct. Length (9) 10.0 mm.; 



width 3.7 mm. District of Columbia, Schwarz limatus n. sp. 



Form still narrower, the size much smaller, black; epipleura, sides of the 

 prosternum and almost the entire abdomen rufescent; legs pale ferru- 

 ginous; elytra strongly iridescent; head two-thirds as wide as the 

 prothorax, with long neck, moderate but very prominent eyes and 

 ferruginous antennae, palpi and labrum; mandibles obscure rufous, 

 blackish distally; prothorax of different form, not quite one-half 

 wider than long, widest rather before the middle; base scarcely so 

 wide as the apex and very finely margined laterally, with extremely 

 obtuse and rather rounded angles; sides subevenly arcuate, finely 

 subevenly reflexed; anterior impression obsolete, the posterior feeble; 

 surface with a few punctures scattered near the foveae, the latter 

 rather short, narrow and deep, not attaining the base; elytra oblong- 

 oval, very moderately convex, one-half longer than wide, not quite 

 a third wider than the prothorax, the striae moderately coarse, not 

 very deep, finely and not at all conspicuously punctate, the punc- 

 tures very finely subcrenulating the intervals, which are almost flat, 

 the seventh stria feeble basally; sinus rather short, distinct. Length 

 (9 ) 8.0 mm.; width 2.8 mm. Texas (Houston) . . . . collucens n. sp. 

 9 Surface rather depressed, black, the legs dark rufous, the elytra with 

 bright iridescence; head three-fifths as wide as the prothorax, with 



