30 NatTurRAL History BULLETIN. 
usual. Lateral sulcus entire, separating the smooth lateral 
margin, which is nearly horizontal on its widest part, narrow- 
ing and declining backward to the shallow lateral fovea. The 
discal space between the crests and the lateral sulcus is un- 
even with shallow longitudinal impressions. Between the 
lateral fovea and the tubercle is another small tooth prolonged 
anteriorly into a very short second crest. /ytra not punct- 
ured, shoulders high, with a very small spine, dorsal lines 
faint, very short, basal punctures indistinct, the sutural im- 
pressed lines parallel. Aédomen very convex, the basal de- 
pression between the short and prominent carine narrower 
than the lateral depression; last ventral in the 4 impressed at 
the base, the penultimate impressed transversely at the tip; 
in the 9 the last ventral is longitudinally rugose at the sides. 
Legs moderately long, tibiz slightly curved, the posterior one 
with a thin process. 
Habitat. Long Island 
B. nigricans, Lec. Black, polished, impunctate, pubes- 
cence thin, antenne, palpi, and legs red. Length, 2 mm. 
Plate), X45 Fig..'93c. 
ffead as \ong as broad, narrower in front, the lateral mar- 
gin with sharp edges, carinaté, front punctate, in the middle 
with two small teeth, vertex convex, carinate, occipital fovez 
pubescent and mutually twice as distant as either from the eye, 
circumambient sulcus deep; occiput carinate. Antenne red (4) 
first joint arcuately cylindrical; second smaller, obconical, as 
long as wide; third thicker and longer than the second, the 
outer side straight, the inner convex, dilated; fourth half as 
wide and about as long as the third; fifth to eighth subequal, 
as wide as long; ninth larger, rounded; tenth nearly twice as | 
thick as the ninth, globose; eleventh one-half longer, acute, 
ovate. Prothorax with the median sulcus very deep, the 
basal tubercles very acute with a short basal median carina; 
lateral foveze pubescent, lateral sulcus deep, discal carinz ob- 
solete. /ytra impunctate, shoulders subacute, sutural inter- 
