The Pselaphid^e of North America. 273 



than half the length of the body; joints are twice as long or 

 longer than thick, ninth and tenth obconical, the last three 

 times longer than thick. Elytra with the posterior limit 

 arcuately lobed. i\bdominal carina? distant more than one- 

 third of the segmental width. Length, 2.0 to 2.2 mm. 

 Europe. 



B. VALiDA, n. sp. Dark piceous-brown, elytra and anten- 

 nx red, legs paler or yellow. 



Head trapezious, inter-antennal space deeply impressed, 

 ^ antenna; not half as long as, the body, the first joint nearly 

 as long as the third and fourth together; second shorter, 

 oblong, rounded, third to sixth narrower not twice as long as 

 thick, seventh and eighth gradually shorter and narrower, 

 the latter quadrate. Ninth and tenth trapezoidal, suddenly 

 increasing in size, wider than long, eleventh thicker and as 

 long as the two preceding together, more convex outside. 

 Prothorax deeply depressed each side near the base. Elytra 

 with the shoulders slightly wider and the suture slightly 

 shorter than in B. sauguinca, abdominal carin^e not including 

 one-third of the segmental width, the segments less convex 

 than in the European specimens. This species is the one 

 called B. saiiguiiica in our cabinets. New York, Illinois. 

 Length, 2.2 mm. 



B. coNjuxcTA, Lee. Black, polished, impunctate, elytra 

 red or darker, antenna; and legs brownish red, palpi yellow. 

 Plate VIII., Fig. 46. 



Head with the frontal margin emarginate, inter-antennal 

 space very concave. Antenna less than one-half the length 

 of the body, first joint strong, obconical, second a little smaller, 

 oval, third and fourth smaller, obconical, fifth to seventh 

 larger, oval, eighth smaller, globular, ninth twice as wide as 

 the eighth, trapezoidal, tenth wider, nearly quadrate, eleventh 

 as long as the three preceding together, truncate at the base, 

 acute at tip, as wide as the tenth. In the ? the intermediate 

 joints of the antenna; are equal in length and width, cylindri- 

 cal, eighth to tenth more or less globular, the last not so long 



