AMERICAN PHILOSOPHICAL SOCIETY. 623 



tennse rufous, not serrate ; first joint rather long, and a little 

 arcuated; second and third joints subequal, the second rather 

 longer and more robust : labrum rufous, prominent : thorax 

 rectilinear on the lateral edge from near the anterior [185] angles, 

 where it is hardly arcuated, to the tip of the spines ; spines acute, 

 carinate; the carina, as in the preceding species, forms the ap- 

 parent edge, and extends more than half the length of the tho- 

 rax; posterior edge with a fissure each side, extending in an ob- 

 vious line upon the margin : scutel angulated obtusely behind : 

 elytra with punctured strise and minutely punctured interstitial 

 lines : beneath black piceous : feet pale yellow ; tarsi, third and 

 fourth joints lobed beneath ; nails pectinated with but few rather 

 robust teeth. 



Length less than one-fifth of an inch. 



Closely resembles the preceding, but is more slender, the 

 pectens of the nails have fewer teeth, and the clypeus is much 

 more obtuse at tip, and the color is different. 



[Also an Adrastus. — Leg.] 



71. E. PERTINAX. — Black; antennae and feet rufous; punc- 

 tures sparse. 



Inhabits Pennsylvania. Massachusetts, Harris. 



Body black, immaculate, with distant grayish hairs : clypeus 

 with large punctures, anteriorly obtusely rounded and elevated, 

 the edge a little reflected : antennas rufous; third joint a little 

 longer than the second : thorax with distant punctures and hairs ; 

 lateral edge nearly rectilinear behind the middle, the posterior 

 angles divaricating but slightly outwards ; base with the lateral 

 fissures rather long : elytra with regular series of punctures, the 

 striae not being impressed, excepting at base and the suturtxl one : 

 feet rufous. 



Length seven-twentieths of an inch. 



72. E. TENAX. — Black; antennae and feet rufous; posterior 

 thoracic angles not excurved. 



Inhabits Massachusetts. 



Closely resembles E. pertinax S., but is much smaller ; the 

 punctures of the thorax are much more numerous, the posterior 

 angles not at all excurved : elytra with the striae distinctly im- 

 1836.] 



