Goleopterological Notices, VII. 599 



The male has the last ventral large, flattened, becoming gradu- 

 ally broadly and feebly concave toward tip, which is broadly, 

 arcuately lobed and slightly deflexed ; the last dorsal is sparsely 

 and feebly punctulate and broadl}^ sinuate, with rounded limiting 

 angles at apex. The female is not represented in the material 

 before me. This species is also isolated and unlike any previously 

 known. 



R. f usciventris. — Convex, only moderately ventricose, the hind hody 

 oblong-subelongate, polished throughout, rufo-testaceous, the head and pro- 

 thoi ax rather more obscure; abdomen black; surface subimpunctate through- 

 out, the pronotum not obviously punctulate at any part; pubescence short and 

 decumbent, moderately dense. Head small, scarcely more than ^ as wide as 

 the prothorax, the fovese normal; eyes prominent and very convex, moderate 

 in size. Antennse slender, }4 ^s long as the body, the club gradual as usual 

 and but moderately stout; second joint a little narrower than the first, slightly 

 longer than wide; three to eight equal in thickness and much narrower; third 

 %, fourth, sixth and seventh 3^ to %, fifth fully 1, longer than wide; eighth 

 not quite as long as wide ; ninth and tenth obtrapezoidal, increasing, a little 

 wider than long; eleventh but slightly oblique at tip and not quite as long as 

 the preceding three combined. Prothorax relatively quite large and transverse, 

 nearly }4, wider than long and much more than }4 ^s wide as the elytra, rather 

 strongly rounded at the sides, widest just before the middle; disk convex; 

 median fovea rather small but deep and perforate. Elytra not very transverse 

 though obviously shorter than wide, the sides distinctly divergent, broadly 

 arcuate behind; humeral swelling distinct; striae and basal fovese normal. 

 Abdomen as wide as the elytra, much shorter from a vertical viewpoint, the 

 first segment more than }4. ^s long, the carinte fine, strongly divergent, about 

 ^ as long as the segment and separated at base by slightly more than the 

 strial interspace. Legs moderate in length and rather stout. Length 1.4 mm. ; 

 width 0.55 mm. 



New York. 



This species is somewhat allied to peregrinator, but may be 

 recognized at once by the less ventricose hind body and sub- 

 impunctate pronotum. The male has the last ventral rather 

 large, flattened toward the median line, the flattened surface 

 ascending toward tip and lobed to fit the broad subcircular sinus 

 in the tip of the last dorsal, the latter segment feebly punctured. 



R. peregrinator. — Strongly ventricose and convex, polished and subim- 

 punctate, except the pronotum, which is distinctly though not densely punctu- 

 late, less so broadly along the median line; body dark brown, blackish beneath, 

 the elytra, legs and antennae pale testaceous, the abdomen infuscate; pu- 

 bescence very short, decumbent and rather abundant. Head much narrower 

 than the prothorax, with the fovese normal; eyes moderate in size, very convex 



