312 ACADEMY OF NATURAL SCIENCES 



. a longitudinally oval rufous spot on the lateral margin, and a 

 transverse impressed line and spot at base : scutel rounded at tip : 

 elytra densely punctured, tip mucronate, and with an indented 

 spot : coxae and trochanters rufous : pectus rufous, a lateral, sub- 

 marginal black spot. 



Length about seven-twentieths of an inch. [248 3 



Taken on the lower Missouri, near Fort Osage : closely allied 

 to the preceding species. 



[Afterwards described as Pyrochroa infxmxata Hentz, and Ped. 

 m arglnkollis Ziegler. — Ltc] 



9. A. IMPRESSUS. — Black : thorax rufous ; an indented spot 

 at the tip of each elytra. 



Inhabits Pennsylvania. 



Mouth, antennae, two basal joints, and palpi at base, dark rufous : 

 thorax rufous, with a longitudinal slightly impressed line : elytra 

 densely and irregularly punctured ; a large profound, indented, 

 oval impunctured spot at the sutural tip of each elytra. 



Length three-tenths of an inch. 



Kesembles A. collaris, but is distinguished by its somewhat 

 larger size, and the profoundly impressed spot at the tip of each 

 elytra. I found this species early in May, attached to the side 

 of a Meloe aiujusticulUs, which was perfectly at rest upon the 

 ground, not appearing to be in the slightest degree incommoded 

 by the weight of its temporary parasite, but seeming rather 

 pleased with its society. This species and the luguhris, collarisy 

 ferminalis, and labi'atus, differ much from the other species of the 

 genus that have come under my observation ; but as they appear 

 to me to approach more closely to this genus than to any other, 

 I place them here for the present. 



ANTHRIBUS Fabr. 

 1. A. NOTATUS. — Black; head, thorax each side before, and 

 elytra at base and tip, with a gray spot. 

 Anthribus notatus Melsh. Catal. 



Head entirely gray above : antennae piceous-black : [ 249 ] tho- 

 rax with an irregular gray spot each side before, connected by a 

 line of the same color, on the anterior margin ; about four very 

 small obsolete gray spots, of which one is each side near the 



[Vol. Y. 



