596 Coleopterological Notices, VII. 



wider than long, a little more than % ^s wide as the elytra, widest just before 

 the middle, the sides rather strongly arcuate, moderately convergent and 

 straight toward base ; disk wholly inipunctate, strongly convex, the median 

 fovea somewhat large, deep and perforate. Elytra rather more than }^ wider 

 than long, the sides divergent, arcuate toward tip ; humeral swelling evident ; 

 strise and three basal fovese distinct. Abdomen well developed, the first seg- 

 ment as wide as the elytra and % as long, 2% times as wide as long, the 

 carinse long, parallel and distinct. Legs moderate, the hind tibiae feebly arcu- 

 ate. Length 1.5 mm. ; width 0.68 mm. 



Kansas. 



Allied to rubicunda, but differing in the form of the abdominal 

 caringe, in the relatively smaller head, more slender and elongate 

 antennae, less inflated hind body and in the rather feebler sinus of 

 the last dorsal segment. The male has the first ventral wholly 

 unmodified, the last moderately large, feebly bitumorose in the 

 middle near the base and very feebly impressed toward tip, which 

 is broadly and briefly lobed ; last dorsal rounded, finely, sparsely 

 punctate, with an impunctate median line, the apex with a rather 

 broad and moderately deep sinus having very broadly rounded 

 lateral limits. In rubicunda the last ventral is much more nar- 

 rowly and arcuately lobed at apex, and is merely flattened toward 

 the middle of the disk. 



R. ursina. — Strongly ventricose, polished, convex and impunctate 

 throughout, rufo-testaceous, the abdomen infuscate ; pubescence long, brist- 

 ling, erect and abundant, pale in color as usual. Head nearly as wide as the 

 prothorax, with distinct and normal fovese, the eyes prominent and situated at 

 rather less than their own length from the base. Antennse rather slender, with 

 a gradually formed and moderate club, )4, ^s long as the body; second joint 

 cylindric, slightly longer than wide ; three to eight equal in width and nar- 

 rower ; three to five elongate and almost equal, about '% longer than wide ; 

 fifth j ust visibly longer than the fourth, the latter distinctly longer than the 

 sixth, which is % longer than wide; seventh a little shorter but fully )^ 

 longer than wide ; eighth a little wider than long, the ninth similar in form 

 but larger ; eighth to eleventh very gradually and somewhat rapidly wider ; 

 eleventh obliquely acuminate, longer than the three preceding combined. Pro- 

 thorax as in Tcansana but relatively smaller and somewhat less transverse, not 

 more than 3^ as wide as the elytra. Elytra short and transverse, the sides 

 strongly divergent and almost evenly arcuate, the humeral swelling large but 

 not very prominent ; sutural stria deep, the discal rather feebly impressed ; 

 basal fovese distinct, the sutural stria becoming sulciform toward base. Abdo- 

 men nearly as in kansana but with the dorsal carinse a little shorter and nota- 

 bly more approximate ; they are almost parallel and very nearly straight. 

 Length 1.5 mm. ; width 0.7 mm. 



Western Missouri. 



