30 Natural 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. Elytra not punct- 

 ured, shoulders high, with a very small spine, dorsal lines 

 faint, very short, basal punctures indistinct, the sutural im- 

 pressed lines parallel. Abdomen very convex, the basal de- 

 pression between the short and prominent carina narrower 

 than the lateral depression; last ventral in the 6 impressed at 

 the base, the penultimate impressed transversely at the tip; 

 in the ? the last ventral is longitudinally rugose at the sides. 

 Legs moderately long, tibiae slightly curved, the posterior one 

 with a thin process. 

 Habitat. Long Island 



B. NIGRICANS, Lcc. Black, polished, impunctate, pubes- 

 cence thin, antenna, palpi, and legs red. Length, 2 mm. 

 Plate X., Fig. 93c. 



Head as long as broad, narrower in front, the lateral mar- 

 gin with sharp edges, carinate, front punctate, in the middle 

 with two small teeth, vertex convex, carinate, occipital foveas 

 pubescent and mutually twice as distant as either from the eye, 

 circumambient sulcus deep; occiput carinate. Antenncs Ye.d (3) 

 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 foveae pubescent, lateral sulcus deep, discal carinas ob- 

 solete. Elytra impunctate, shoulders subacute, sutural inter- 



