192 DESCRIPTIONS OF NEW SPECIES. 



50S. P. rtlficolle. Nigrum opacuni, prothorace rufo nitido parce 

 puuctato, disco fortiter trituberculato, medio subtiliter carinato, antice 

 constricto, lateribus obtuse tuberculatis, basi subconstricto profunda 

 transversim impresso, margine basali nigro ; elytris planis, punctatis, 

 angulo suturali promiuulo. Long. 8 — 9 mm. 



Napa, and Mariposa; California. The 1st ventral segment in 

 9 is' as long as the others united, the 2d excavated, clothed with 

 very long fulvous hair. The antennae and legs are clothed with 

 very long flying hairs ; on the prothorax and elytra only a few 

 remain, having been lost probably in the alcohol in which the 

 specimens were preserved. 



509. P. cyanipenne. Flavo-ferrugineum, longe villosum, (protho 

 race J rufo, £ nigro) capite, antennis, pospectore, femoribus apice, ti- 

 biis tarsisque nigris ; elytris cyaneis, planis, punctatis. Long. 7 — 8 mm. 



California, Dr. Horn and Mr. Edwards. Of the same size as 

 the preceding, but the prothorax is less angulated on the sides, 

 not deeply transversely impressed at the base, and there is no 

 impressed dorsal line. 



Two % have the prothorax black, the base of the tibia? yellow, 

 and the elytra greenish-blue. 



M EGOBR] I n Lec. 



This new genus is founded on a comparatively large species 

 from California, which is intermediate between Cartallum and 

 Pilema, having the palpi with the last joint slightly dilated and 

 oval, truncate at tip, and the mesosternum narrow, but scarcely 

 acute as in Cartallum. It differs from both by the prothorax 

 being longer, with the lateral tubercles much larger and obtuse, 

 and the apical and basal constrictions longer, equal in width. 

 As is commonly the case, in intermediate grades of structure, the 

 specific characters are quite different, so that a stronger individu- 

 ality is thereby impressed on the organism. The color is testa- 

 ceous ; the punctures of the elytra but few, not coarse, and ar- 

 ranged in three lines extending from the base to a little behind 

 the middle ; there are a few scattered punctures between these 

 lines, and outside of them ; there is an appearance of an angu- 

 lated pale band, with the point directed forwards on the suture, 

 in front of the middle, and a few nebulosities behind. The anten- 

 nas are longer than in Pilema, and the outer joints are compara- 



