Coleopterological Notices, VII. 601 



parabolic from near the base and apex, the latter distinctly less than }4 the 

 maximum width and ^ as wide as the base : disk strongly convex, with dis- 

 tinct and normal fovese, the median deep and perforate. Elytra large and well 

 developed, a little shorter than wide, twice as wide as the prothorax, the 

 suture fully }4: longer than the humeral width ; sides distinctly divergent, 

 broadly arcuate toward tip, the humeral swelling pronounced ; striae and fovese 

 normal, the former very distinct. Abdomen, from above, as wide as the elytra 

 and % as long, the iirst segment less than }{ as long, three times as wide as 

 long, the carinse extending to the middle, straight, feebly divergent and 

 separated by I3 the total width. Legs well developed and rather stout. 

 Length 1.65 mm. ; width 0.78 mm. 



Michigan ; Canada (Ottawa). 



A large and conspicuous species, readil}^ distinguishable from 

 puncticollis, which it resembles in form and coloration, by its 

 larger size, very much feebler sculpture of the pronotum and by 

 the male sexual modifications. The last ventral of male is large, 

 and is broadlj^ and distinctly concave toward the middle through- 

 out, the concavity smooth; the last dorsal is well developed, 

 sparsely and distinctly punctulate, the apex very broadly and 

 strongly sinuate in circular arc with somewhat narrowly rounded 

 lateral limits, the sides thence moderately oblique and almost 

 straight to the base. In puncticollis the last ventral of the male 

 is much smaller, and has a narrower and feeble, oval concavity 

 along the middle, the last dorsal more narrowly and very feebly 

 sinuato-truncate at tip, 



R. liorealis. — Similar in form to the preceding but much smaller, pol- 

 ished, black or piceous-black with pale rufous elytra, legs and antennae, sub- 

 impunctate, the pronotum sparsely and feebly punctulate, becoming smooth 

 toward base; pubescence short, strongly recurved and moderately dense. Head 

 distinctly narrower than the prothorax, the three fovea; normal; eyes moder- 

 ately large, convex, sitaated at rather less than their own length from the base. 

 Aniennfe but little longer than the head and prothorax, the club very gradu- 

 ally formed as usual; second joint cylindric, much smaller than the first, at 

 least % longer than wide; three to eight equal in width, the former obconic, 

 the remainder cylindric; third f^'^, fourth and sixth slightly more than ,^3, fifth 

 % and seventh barely more than i^, longer than wide; eighth nearly ^3 wider 

 than long; ninth obtrapezoidal, about as long as wide, the tenth slightly wider 

 than long; eleventh very gradually and obliquely pointed, rather longer than 

 the three preceding. Prothorax nearly % wider than long, widest scarcely be- 

 fore the middle, the sides moderately prominent and rounded; apex barely }4 

 of the maximum width and nearly % as wide as the base; surface strongly 

 convex, the fovete normal, the median deep and perforate. Elytra well devel- 

 oped though barely twice as wide as the prothorax, only slightly shorter than 



