AMERICAN PHILOSOPHICAL SOCIETY. 577 



ous ; antennae pale, towards the tip brownish ; thorax, angles 

 almost rounded ; elytra yellowish white, with a common fuligin- 

 ous disk; feet yellowish white; tibis and tarsi darker. 



Length three-twentieths of an inch. 



This occurred extremely numerous, in October, under the sur- 

 face of the sand in flat places on the sea beach, over which the 

 high tides flow. When the water subsides, their labors become 

 visible. They proceed forwards a little beneath the surface in a 

 very irregular line, casting up the sand so as to resemble a 

 miniature mole tunnel. 



On the wet or partially dry plain, their tunnels, though very 

 small, are yet very striking to the eye, in consequence of their 

 great abundance, and being drier and whiter than the general 

 surface. They appear to be in search of the various minute 

 crustaceous animals, that take refuge in the sand on the recession 

 of the waters. 



[Belongs to Bledtus. — Lee] 



4. 0. EMARGINATUS. — Black; elytra whitish with a fuligi- 

 nous suture. 



Inhabits Indiana. 



Body black, punctured ; head with numerous, but not crowded 

 punctures ; two longitudinal indentations between the antennae ; 

 antenuEB, mandibles and palpi honey -yellow; thorax with a pice- 

 ous tinge, rounded behind; with rather sparse, well defined 

 punctures, and an obvious, impressed, dorsal line; elytra with 

 separate punctures and a much dilated, common, fuliginous vitta ; 

 sutural tip Very obtusely [462] rounded; feet honey-yellow; 

 thighs and coxge whitish. 



Length less than one-tenth of an inch. 



The obtusely rounded sutural tip of Ae elytra, gives this part, 

 in repose, a profoundly emarginated appearance. 



[Also a Bkdius. — Leg.] 



MOLOSOMA Say. 



Labrum entire ; palpi filiform, terminal joint of the maxillaries 

 much longer than the second, slightly attenuate to the tip ; an- 

 tennae before the eyes, inserted under the margin, gradually 

 thicker at tip, four last joints larger; body cylindric ; thorax 

 1834.] 37 



