294 NaTuRAL History BULLETIN. 
inal basal carinz 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 tibiee of ¢ arcu- 
ate. 
Bryaxis rubicunda is described as having the prothorax im- 
punctfate, broadly convex with large lateral fovez fully in 
view from above, the basal abdominal carine 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 carine 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 carine though 
not otherwise materially different. 
Habitat. Atlantic Coast to Missouri river. 
B. TRIGA. Lec. Length,1.8 mm. Ferruginous, tuber- 
cle on first dorsal segment triangular, the carine approximate 
and divergent. 4 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 foveee 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. Antenne 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- 
