JOURNAL 



JQffo Uoph (fSntomoIogiral jSoriprji. 



Vol. XVI. JUNE, 1908. No. 2. 



LIST OF THE LAMPYRID^E FROM THE HUA- 

 CHUCA MOUNTAINS, ARIZONA, AND DE- 

 SCRIPTIONS OF NEW SPECIES. 



By Charles Schaeffer, 

 Brooklyn, N. V. 



In the following list and descriptions three genera occur which are 

 new to the fauna of the United States. These are Euryopa, Discodon 

 and Plectonotum. The genus Euryopa Gorh. is a member of the 

 tribe Mastinocerini as defined by Dr. Leconte and the genus as well 

 as its new species and the new Phengodes will be described by Mr. 

 H. S. Barber who is revising this tribe. Discodon Gorh. is closely 

 allied to Polemius Lee. from which it differs only in having the outer 

 claws of the middle and hind tarsi of the males cleft. Although 

 remarking that this is the only character separating the two genera, 

 Mr. Gorham,* however, described difficile, bivittatum and melan- 

 cholicum as Discodon which by their uncleft middle and hind outer 

 tarsal claws are plainly Polemius. Polemius planicollis Lec.f is a Dis- 

 codon as the males have the outer claws of the middle and hind tarsi 

 cleft ; this may also be the case with some of our larger Polemius 

 which are unknown to me. However, the different form of the 

 tarsal claws alone is, in my opinion, not sufficient to give it more than 

 subgeneric standing; for with the same right the divisions of the 

 genera Podabrus and Telephorus, based on the form of the tarsal 



*Biol. Cent. Am. Col., Vol. Ill, pt. 2. 



t As planicollis is not preoccupied in this genus the change of name proposed by 

 Dr. Gemminger is not necessary. 



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