The Pselaphip^ of North America. 299 



•eleventh wider, ovate, as long as the ninth and tenth together. 

 Antennce of male with the first to third joints sub-equal in 

 width, nearly all of the same length, fourth very small, trian- 

 gular, fifth transverse in some specimens, three times as wide 

 as the length, which equals that of the second. Sixth to ninth 

 of similar form gi-aduallv shorter, transverse, tenth wider, 

 one-third as long as wide, eleventh ovate-acuminate as long 

 as the first and second together. The posterior tibia? of the 

 5 are dilated. Prothorax impunctuate, widest at or behind 

 the middle, evenly carinate, lateral foveie somewhat less than 

 in full view from above, median puncture conspicuous. Elytra 

 a little more than one-third longer than the prothorax, the 

 same across the high shoulders, and about one-third more 

 across the tips. They are fainth' reticulate, uneven, discal 

 lines slightl}- arcuate, nearly parallel, basal intermediate 

 puncture conspicuous. Sutural lines nearly parallel. Abdo- 

 men with the basal carinre one-fourth the lencjth and includinjr 

 one-third the width of the segment. 



Habitat. Eastern States. The form with red elytra from 

 the Pacific Coast is described as albionica by Motschulsky. 



B. iNFORMis, Casey. Dark red, elytra brighter, legs and 

 antennas testaceous, polished, hardly punctulate, pubescence 

 short. Length, 1.4 mm. Plate IX., Fig. 69. Antenna of 3 

 after Casey. 



Head more visibly punctured at the sides, fove« not large, 

 equal, eyes prominent, distant about their own length from 

 the base, frontal margin broadly angulate. Antennce not 

 longer than the head and prothorax, the three basal joints 

 longer than wide, nearly equal in length, gradually decreasing 

 in width; fourth wider than long, small, fifth thicker, a little 

 longer than wide, sixth with the length and breadth equal, as 

 wide as the fifth, obliquely truncate; seventh to ninth slightly 

 transverse, as wide as the fifth, tenth twice the width of the 

 ninth, half as long as wide; the eleventh joint is three times as 

 wide as the ninth, not much longer, and truncate at base. 

 Prothorax slightly broader than long, transversely convex, 



