266 Memoirs on the Coleoptera 



Antennae much longer, with more elongate though not quite so narrow- 

 joints 4 



4 — Elytra more elongate, fully two-fifths longer than wide and as long 

 as the antennae. Body elongate, polished, piceous-black, the hu- 

 meral flavate marking extending at the sides to a little before the 

 middle, and, on the disk, to posterior third, the inner side following 

 the second stria rectilinearly for a long distance; head small, scarcely 

 over two-thirds as wide as the prothorax, the eyes rather small 

 but prominent; antennae slender, fuscous, becoming pale in the 

 four or five basal joints; prothorax relatively large, scarcely one- 

 half wider than long, in outline nearly as in the two preceding but 

 with the sharp basal angles slightly more than right; margins very 

 finely reflexed, broadly deplanate at the angles; anterior impression 

 extremely fine and feeble and the posterior obsolete medially, the 

 median stria fine but deep, the surface very smooth; elytra slightly 

 broader posteriorly, with broadly arcuate sides, two-thirds wider 

 than the prothorax, the striae fine and very feebly impressed. Length 

 2.8 mm.; width 1.15 mm. Texas (Austin). A single example, 

 taken by the writer habilis n. sp. 



Elytra in similar manner fully as long as the antennae, the head and 

 prothorax larger, the eyes very much more prominent. Upper 

 surface almost deep black, the under surface piceo-rufous, the 

 epipleura and legs bright flavate; head three-fourths as wide as 

 the prothorax, with very prominent eyes, the anterior impressions 

 parallel and very remotely separated; antennae long and slender, 

 flavo-rufous, gradually dusky distally, the fourth joint fully three 

 times as long as wide; prothorax large and transverse, four-sevenths 

 wider than long, widest near apical third or fourth, the sides strongly 

 rounded; thence oblique and less arcuate posteriorly, becoming 

 parallel for some distance before the right and sharp angles, ex- 

 tremely finely reflexed throughout; base broadly lobed in the middle, 

 somewhat wider than the broad apical sinus, the apical angles 

 broadly rounded; transverse impressions very feeble, the stria 

 deep, the basal foveae very small and feeble; elytra rather more 

 broadly oblong than in habilis, with broader humeri, only feebly 

 inflated posteriorly, the humeral and apical angles broadly rounded, 

 nearly two-fifths longer than wide, about one-half wider than the 

 prothorax, the sharply defined pale area occupying nearly basal 

 half at the sides and outer half at base, the posterior prolongation 

 extending to three-fifths and not quite as long as the humero- 

 marginal part; striae fine and very feeble, more nearly obsolete than 

 in habilis. Length 3.2 mm.; width 1.22 mm. Colorado (Boulder 

 Co.), — Cockerell coloradensis n. sp. 



Elytra less elongate, only about a fourth longer than wide, shorter than 

 the antennae 5 



5— Head smaller, with well developed and very prominent eyes, piceous- 

 black, polished; humeral flavate spot extending through basal third 

 at the sides and to just behind the middle near inner third on the 

 disk, the posterior arm narrower than in habilis and more oblique; 

 under surface piceous-black, the legs and epipleura pale flavate; 



