SOME NORTH AMERICAN INSECTS. 185 



rior 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 thorax ; pos- 

 terior edge with a fissure each side, extending in an obvious line upon 

 the margin: scw/e/ angulated obtusely behind: elytra with punctured 

 striae and minutely punctured interstitial lines: ftewe«M 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 colour is different. 



71. E. pertinax. Black; antennae and feet rufous; punctures 

 sparse. — Inhab. Pennsylvania. Massachusetts, Harris. 



Body black, immaculate, with distant grayish hairs : clypeus with 

 large punctures, anteriorly obtusely rounded and elevated, the edge a 

 little reflected: antennae 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, except- 

 ing at base and the sutural one \ feet rufous. — Length seven-twentieths 

 of an inch. 



72. E. tenax. Black; antennae and feet rufous; posterior thoracic 

 angles not excurved — Inhab. Massachusetts. 



Closely resembles Fi. pertinax, S., but is much smaller; the punc- 

 tures of the thorax are much more numerous, the posterior angles not 

 at all excurved : elytra with the striae distinctly impressed and punc- 

 tured, the interstitial spaces with rather large punctures: feet rufous, 

 — Length less than three-tenths of an inch. 



For this species I am indebted to Dr Harris. 



