Dec, 1916.] New Species of Elaterid^. 259 



deeply impressed ; intervals flat, not densely punctate, near base granulate- 

 rugose. Prosternum and metasternum somewhat coarsely and sparsely punc- 

 tate, abdomen more finely punctate. Length 8.75 mm. 



Huachuca Mts., Arizona (Schaeffer). 



A fairly common species. The antennal joints four to eleven of 

 the male are very long, equal in length and not serrate ; in the female 

 the joints are shorter and gradually decreasing in length and the 

 form, as usual, is more robust. 



Megapenthes nigriceps new species. 



Form of rufilabris, color ferruginous, head piceous near apex paler. 

 Head coarsely and rather densely punctate ; antennas in the male as long as 

 head and prothorax together, second and third joints, small, fourth joint 

 longer than second and third joint together, joints elongate and feebly ser- 

 rate. Prothorax gradually narrowing to apex, sides scarcely arcuate, hind 

 angles bicarinate, the inner carina fine and very close to the lateral margin ; 

 surface punctate and moderately large, ocellate punctures. Elytra gradually 

 narrowing from base to apex, striae moderately deeply impressed and punctate ; 

 intervals flat, towards base granulate rugose, towards apex moderately not 

 densely punctate. Prosternal side pieces more coarsely punctate than the 

 prosternum ; metasternum, densely and rather coarsely punctate, punctures 

 coarser at sides than at middle ; abdomen closely punctate. Length 8 mm. 



Brownsville, Texas (Schaeffer). 



The specimen described is a male and closely related to rufilabris 

 from which it differs in color, longer antennal joints, coarser punc- 

 tation of prothorax, relatively longer hind tarsal joints and rather 

 deeply emarginate hind coxal plates. Both species, rufilabris and 

 nigriceps have the hind angles of prothorax bicarinate and should be 

 placed in section B of Dr. Leconte's table^ with angularis which dif- 

 fers from both of these species in having the hind coxal plates trun- 

 cate and a shorter third antennal joint. 



Megapenthes tarsalis new species. 



Form of rufilabris, black, front of head and prothorax yellowish-red, the 

 latter above and below with a large, black spot, which extends narrowly to 

 the anterior margin but not to the lateral nor basal margin ; basal margin of 

 elytra also narrowly reddish. Head densely punctate; antennae with second 

 joint very small, third nearly as large as the fourth, triangular. Prothorax as 

 in rufilabris but hind angles not bicarinate ; surface moderately densely punc- 



1 Trans. Am. Ent. Soc, XH, 6. 



