628 TRANSACTIONS Or THE 



line, extending from the uiidule to the base of the thorax, is 

 probably somewhat similar to that of the caj)acinus Ahrens ; but 

 the general form is much more cylindric. 

 [Also a Fornax. — Leg.] 



11. E. CLYPEATUs S. (Elafcr c, Ann. Lye. N. Y. i. p. 266.) 



12. E. AJVKENicoRNis. — Black ; antennae pectinate, second 

 und third joints, and feet rufous. 



Inhabits Indiana and New Hampshire. 



Body small, black, densely punctured above and beneath : an- 

 tennae with a process on each joint excepting the three basal 

 ones, black, the second and third joints dull rufous: thorax con- 

 vex, simple; posterior angles a little excurved, acute, without 

 carinated line ; base without fissures : elytra, third and fourth 

 striae only half the length of the elytra : feet rufous. 



Length over three-twentieths of an inch. 



Resembles E. 2^>/(/mseus Fabr., but the thorax is without in- 

 dentation. I obtained two specimens in Indiana, and received 

 one from Dr. Harris. 



[Belongs to Eucnemis ; when laid on its back, this insect will 

 make a feeble attempt to spring, like a genuine Elater. — Lec] 



■}" "j" ■{■ Pectus canaliculate each side of the middle. 



13. E. TRIANGULARIS S. {Elatcr t., Joum. Acad. N. S. iii. p* 

 170.) 



Antennae, first joint slightly arcuated, obliquely truncate at 

 tip; second obconic, small, arcuated at base : thorax with an im- 

 pressed line behind the middle ; anterior margin piceous. 



It occurs in Indiana as well as Missouri. 



[Belongs to 3Iicrorhagus. — Lec] 



14. E. HUMERALis. — Black ; elytra rufous at base. 

 Inhabits Indiana. 



Body black, minutely punctured, and with minute hairs ; front 

 with an obsolete indented line : antennae rather hairy; first joint 

 slightly arcuated, obliquely truncate at tip ; second obconic, 

 arcuated at base ; third shorter than the two following ones to- 

 gether ; remaining joints [190] subequal, to the last, which is a 

 little longer; thorax convex, but not much elevated; elytra 



[Vol. VL 



