628 TRANS.ACTIONS OF THE 



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

 probably somewhat similar to that of the capuclnus Ahrens ; but 

 the general form is much more cylindric. 

 [Also a Fornax. — Leg.] 



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



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

 and 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 escurved, acute, without 

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

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



Length over three-twentieths of an inch. 



Resembles E. pi/ginscus Fabr., but the thorax is without in- 

 dentation. I obtained two specimens in Indiana, and received 

 one from Dr. Harris. 



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

 make a feeble attempt to spi'ing, like a genuine Elater. — Lec] 



f f "j" Pectus canaliculate each side of the middle. 



13. E. TRIANGULARIS S. (Elater t., Journ. Acad. X. S. iii. p- 

 170.) 



Antennae, first joint slightly arcuated, obliquely truncate at 

 tip J 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 Microrhagus. — 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 : antennie 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. VI. 



