LAMPYRIDAE. 187 



are large and prominent. The middle coxae are separate, but the 

 raesosternum proper appears to be of a membranous consistence. 

 The claws of the tarsi are simple. 



Chauliognathus has been found in the Atlantic and Central 

 districts ; the antennae are filiform ; the elytra are as long or 

 nearly as long as the abdomen, and rounded at tip. The anterior 

 margin of the thorax is rounded. 



Tribe II.— TELEPHORI1VI. 



The head is but slightly prolonged before the eyes ; the maxillae 

 are moderate in size, and the mentum is moderate, or small and 

 quadrate; the maxillary palpi are moderately long, and of vari- 

 able form. The antecoxal plates are small, not conspicuous, and 

 the presternum is distinct before the coxae. The middle coxae 

 are contiguous, and the mesosternum is corneous. 



I would divide our genera into four groups : — 



Elytra entirely covering the wings ; 



Third joint of tarsi prolonged beneath. Omethes. 

 Third joint of tarsi simple ; 



Cervical sutures confluent ; thorax truncate in front. Podabki. 



Cervical sutures separate ; thorax rounded in front. Telephori. 



Elytra abbreviated, wings exposed. Maltiiini. 



Group I. — Omethes. 



A singular little insect, found in the Atlantic States, constitutes 

 this group. The head is short ; the sutures from the buccal cavity 

 are widely separated ; the palpi are moderately long, and the last 

 joint is oblong, not dilated, rounded and almost truncate at tip ; 

 the mandibles are long, slender, curved and acute ; the sides of 

 the thorax are rounded, and strongly margined ; the anterior 

 margin is slightly emarginate. The antennae are long, rather 

 stout, and feebly serrate, with the second joint a little shorter 

 than the third. The under surface of the first joints of the tarsi 

 is not spongy; the third joint is prolonged beneath, and the 

 fourth joint considerably lobed ; the claws are dilated at base 

 into a broad tooth. 



The species Omethes marginatum is nearly one-fifth of an inch 

 long, elongate, black, clothed with short erect hair; the thorax, 

 legs and base of the antennae are reddish yellow; the elytra are 

 punctured, and feebly striate, with the suture and margin pale. 



