294 Natural History Bulletin. 



inal basal carinas are divergent from the base, never very long" 

 including from more than one-sixth to less than one-fourth of 

 the abdominal width. Legs slender, posterior tibiae of 5 arcu- 

 ate. 



Bryaxis rubicunda is described as having the prothorax im- 

 punctuate, broadly convex with large lateral foveas fully in 

 view from above, the basal abdominal carina? divergent from 

 the base and including one-fifth of the width. But on other 

 specimens of the same form, differing slightly in size faint 

 punctures may be detected with a magnifying power of sixty 

 diameters on the pronotal disk. The abdominal caringe include 

 also from one-sixth to one-fifth of the width. I take them to 

 be all varieties of the same species excluding all others with 

 evenly distributed punctures and less divergent carin?e though 

 not otherwise materially different. 



Habitat. Atlantic Coast to Missouri river. 



B. trigma. Lee. Length", i.S mm. Ferruginous, tuber- 

 cle on first dorsal segment triangular, the carina? approximate 

 and divergent. ; last ventral with a deep sharply defined oval 

 fovea (Leconte's description). 



Habitat. Missouri. Unknown to us. 



B. BicoLOR, n. sp. Dark red-brown, antenna?, palpi and 

 legs yellowish red, elytra piceous-black, punctulate, moderately 

 long. Length, 1.7 mm. 



Head impunctuate, surface between the front and base an 

 equilateral triangle; the fove^e equal; eyes small, not promi- 

 nent, the lateral limits of the vertex not carinate, clypeus sim- 

 ple, thinly margined in front, labrum entire, twice as wide as 

 long. Antcniue robust, hairy, scarcely as long as the head 

 and prothorax together; first and second joints square, not 

 perceptibly longer than wide; third obconical, narrow, as long 

 as the second and equal to the fifth. Fourth, sixth and seventh 

 equal in length and width, as wide as the fifth; eighth lenticular 

 very short, three times as wide as long, ninth and tenth trape- 

 zoidal twice as wide as long, increasing in width. Eleventh 

 three-fourths as wide as long, equal in length to the three pre- 



