602 Coleopterological Notices, VII. 



■wide, the suture fully }ji longer thaa the humeral width ; sides moderately di- 

 vergent, becoming broadly arcuate; humeral swelling conspicuous; striae and 

 fovece normal. Abdomen, from above, as wide as the elytra and % as long, the 

 basal segment nearly }4 as long, not quite three times as wide as long, with 

 the apex broadly arcuate; carinte not quite attaining the middle, rather 

 strongly divergent and separated by }{ the total width, by rather less at base. 

 Legs rather slender. Length 1.25 mm.; width 0.6 mm. 



Canada (Ottawa, — Mr. W. H. Harrington); Massachusetts 

 (Lowell, — Mr. Bianchard). 



Apparently an abundant and rather widely distributed species, 

 closely allied to puncticollis. but distinguishable by the feeble 

 sculpture of the pronotum, diverging and not parallel abdominal 

 carinae, shorter antennae and slightly smaller size; the fifth joint 

 of the antennae in puncticollis is more than twice as long as wide, 

 and the obtrapezoidal ninth and tenth are both longer than wide. 

 The sexual characters are nearly as in puncticollis, the last ventral 

 being feebly concave along the middle and the last dorsal feebly 

 sinuato-truncate at tip, the truncature about f as wide as the 

 base. The specimens from Lowell may possibly represent a 

 variety, as the antennal joints are not proportioned exactly the 

 same and the elytra are relatively a little shorter, but all the 

 other characters are apparently similar ; in these examples the 

 eighth joint of the male antenna is about as long as wide and 

 quite obliquely truncate at tip, the ninth and tenth both distinctly 

 wider than long. The elytra in the female of this species are 

 rather shorter, with more diverging sides and are frequently more 

 obscure in coloration. 



R. distans. — Moderately veutricose, convex and pale flavo-feruginous 

 throughout, the elytra still somewhat paler; integuments shining, quite dis- 

 tinctly though sparsely j)unctulate throughout, the pronotum smooth along 

 the median line and toward base, the head slightly punctulate toward 

 base ; pubescence very short, moderately dense and strongly recurved. 

 Head only slightly, though obviously, narrower than the prothorax, with 

 normal fovese, the eyes moderately large, convex, situated at distinctly 

 less than their own length from the base. Antennx slightly longer than 

 the head and prothorax, moderately slender, the three outer joints rather 

 rapidly wider, the last scarcely )^ longer than wide and obliquely pointed ; 

 second smaller than the first, ovo-cylindric, distinctly longer than wide; three 

 to eight narrower and equal in thickness, the former more obconic ; third %, 

 fourth and seventh %, fifth 3^ and sixth nearly '%, longer than wide ; eighth 

 quadrate ; ninth fully as long as wide ; tenth distinctly wider than long. 

 Prothorax with the rounded sides moderately prominent, about % wider than 



