Coleopterological Notices, VI. 629 



purely fisexual, and scarcely at all developed in the genera of this 

 tribe which have unemarginate eyes. In Mastoremus, which also 

 has emarginate e.yes, it is very noticeable, and there may possibly 

 be some correlation between these characters. 



R. gratiis. — Eather narrow, black, the femora and tibite toward base 

 slightly nifeseent, sparseh' clothed with complex pubescence, consisting of al- 

 most evenly distributed suberect short gray hairs, widely scattered long erect 

 black setoe, and decumbent coarse white hairs in uneven widely sc<attered spots 

 on the elytra. Head as wide as the prothorax, about as long as wide, the eyes 

 large and prominent, separated by but slightly more than their own width on 

 the front, the latter coarsely, densely punctate and coarsely shaggy; antennae 

 slender, moderate in length; palpi moderate. Prothorax as long as wide, 

 rounded on the sides at apical third, thence feebly convergent and broadly, 

 evenl'y sinuate to the base; apical constriction fine, extending across the dorsal 

 surface; apical lobe short, three-fifths as wide as the base; disk not canalicu- 

 late, not very coarsely, densely punctate and dull, the punctures longitudin- 

 ally coalescent. Scutellum clothed with white hair. Elytra scarcely more 

 than twice as long as wide, fully three-fourths wider than the the prothorax 

 and rather more than three times as long; sides subparallel and nearly straight 

 to apical fifth, then almost evenly rounded, finely dehiscent toward apex, the 

 sutural angles right; disk polished, coarsely, deeply punctate, the punctures 

 separated by about their own diameters. Under surface shining, moderately 

 closely punctate and clothed with long hair, qiute sparsely on the abdomen. 

 Legs moderate, the femora gradually stout; tibite roughly asperate externally; 

 hind tarsi fully three-fourths as long as the tibiae, with the basal joint strongly 

 contorted at base and much longer than the fourth. Length 8.4 mm. ; width 

 2.2 mm. 



California (Sta. Cruz Co.) 



The two specimens are perfectly similar males, having the fifth 

 ventral deeply excavated in the middle throughout the length, 

 the sides of the excavation prominent .and lamellate posteriori}^ 



R. decorellus. — Moderately slender and convex, black, the tibiae, ex- 

 cept at base and apex, and the basal parts of the femora feebly suffused Avith 

 rufous; elytra with a feeble violaceo-aeneous metallic lustre; vestiture nearly 

 as in grains but still somewhat simrser, the elytral spots rather more numer- 

 ous and more evenly scattered. Head densely punctate and dull, the eyes 

 large and prominent, separated on the front by quite distinctly more than 

 their own width; antennae slender, filiform, the basal joint stoutest, but little 

 longer than the head and prothorax. Prothorax noticeably longer than wide, 

 rounded on the sides anteriorly, subparallel and broadly, feebly sinuate thence 

 to the base, the apical node short, nearly two-thirds as wide as the base; disk 

 dull, moderately coarsely, deeply, longitudinally punctato-rugose, the sculp- 

 ture biit little concealed hy the vestiture. Scutellum clothed as usual with 

 white pubescence. Elytra almost twice as wide as the prothorax and much 



