272 Natural History Bulletin. 



Elytra and prothorax very indistinctly punctuate, pubescence 

 very fine; color, dark piceous, elytra, legs and palpi red, 

 antennje darker, not straight. In the male the second joint 

 is very large, third and seventh lenticular, transverse, third 

 and fourth smaller, the fifth Avider than the first; eighth joint 

 smallest, ninth, tenth and eleventh forming a connate club. 

 Length 1.2 mm. California. - - - dcformata. 



Piceous-black, elytra red, pubescence fine, plentiful, antennae 

 dark brown, legs lighter. Prothorax very convex, the lateral 

 fove^ not in full view from above, punctate near the base; 

 abdominal cariase separated by one-third of the segmental 

 width. 5 with the frontal fovea wanting, the first antennal 

 joint transverse, truncated, pyramidal. The fifth, sixth and 

 seventh are larger and thicker than the four preceding them. 

 Length, 1.2 mm. California, Washington. - fundata. 



Black, elytra dark red, antennae and legs dark brown, pubescence 

 fine, conspicuous; head distinctly, elytra sparsely, prothorax 

 densely punctulate, abdominal carinas distant, one-fourth of 

 the segmental width. Antennae of ^ with the fifth joint 

 larger than the second, sixth smaller, fourth and seventh 

 equal, still smaller, all irregularly rounded. Length, 1.3 mm. 

 California. .....-- franciscana. 



Clear yellowish brown, pubescence fine, prothorax inipunctate, 

 elytra and abdomen sparsely punctulate, lateral foveje of pro- 

 thorax in full view from above, abdominal carinae enclosing 

 one-third of the segmental width. Antennae of .J long, fifth 

 and sixth joints larger, longer than wide, one-half wider than 

 the first, fourth and seventh smallest, equal, seventh to tenth 

 gradually wider, eleventh as wide as the fifth and one-third 

 longer. 2 with the frontal fovea conspicuous, fifth and sixth 

 joints not quite so large. Resembles B. complectens and may 

 be identical with it. Length, 1.2 mm. Texas. - tumida. 



Section I. (Rybaxis, Saulcy. Bryaxis, Thorns.') 



In addition to the characters given in the synopsis, the 

 males have a strong tooth on the anterior tibiee. Descriptions 

 are appended of our three species and also of a European 

 specimen of sang'uinca which has been listed as a member of 

 our fauna, probably through an error in determination. 



B. sanguinea. Leach. (6 loxgicorxis, Aube, var. laminata, 

 Mots.) Frontal margin straight, inter-antennal space slightly 

 concave, surface of vertex quadrate. Antennas of 3 more 



