6 [February, 



Laminae tectrices intus quadrangulariter dilatatae . Anelastes Kirby. 



yS. Caput sub oculis valde sulcatum. 

 Laminae tectrices angustae Hylociiares Latr. 



b. Thorax marginatus, subtus ad latera sulcatus. 



Antennae tenues articulo S'o sequentibus longiore . Fornax Lap. 



Antennae tenues articulo S'o non longiore . , , Isarthrus. 

 Antennae valde serratae vel pectinatae .... Eucnemis Ahrens. 



c. Thorax margine interrupt, vel medio obsolete. 



Sulci antennales ad prosterni marginem siti, . . Microrhagtjs Esch. 

 B. Tarsi subtus laminiferi. 



Sulci antennales laterales - Galea Esch. 



I am not sure that the primary division into genera with and without tarsal 

 appendages is natural, but as I have had no opportunity of examining any genus 

 of the latter division, I do not dare to disturb the arrangement adopted by all pre- 

 vious entomologists. From considerations derived from the study of other Elaters, 

 I am inclined to think that it would be betj^er to divide this portion (B) among 

 those that precede it, putting Galba next to Eucnemis in (b.) and the foreign 

 genus Pterotarsus before Microrhagus in (c). 



Melasis Oliv. 



1. M. pectinicornis Mels. Proc. Ac. Nat. Sc. 2,148. Pennsylvania, Mels- 

 heimer ; Ohio, Schaum. 



Tharops Lap. 



1. T. ruf ic orni s. Melasis mjicornis Say, Journ. Acad. Nat. Sc. 3,165: 

 "Eucnemis (Nematodes) rii/icor7tis Say, Trans. Phil. Soc. 6, 187. Missouri; the 

 elytra are yellow, with the posterior half black : sometimes they are entirely 

 yellow. The antennae of the male are strongly flabellate. 



2. T. obliquus. Eucnemis obliqmis Say, Trans. Am. Phil. Soc. 6,187. 

 Ohio, Dr. Harris. My specimens are two fifths of an inch long, which is double 

 the size mentioned by Say. 



EURYPTYCHUS. 



Clypeus ad apicem rotundatus : antennae articulo Imo elongato, 3'o praecedente 

 longiore, 4 8 subaequalibus crassitie paulo longioribus, 9 10 latioribus, et trip- 

 le longioribus, 11 iterum longiore, elongato-ovali. Palpi articulo ultimo dilatato, 

 triangulari ; presternum postice promineus, mesosternum profunde excavatum ; 

 tibiae calcaribus apicalibus distinctis ; tarsi tenues, articulo 1""" elongato ; la- 

 minae tectrices coxarum posticarum intus gradatim valde dilatatae, apice suba- 

 cutae. 



The body is regularly arched, moderately wide for this family, and gradually 

 narrowed behind the thorax : the thorax is much narrowed in front and rounded 

 on the sides. The general aspect is precisely that of Ampedus. 



1. E. heterecerus. Eucnemis heteroceriis Say, Trans. Am. Phil. Soc. 

 6, 186. Pennsylvania, Messrs. Ziegler and Rathvon. 



Epiphanis Esch. 



The insect that I consider as belonging to this genus, differs from the preced- 

 ing, in having the 3d joint of the antennae scarcely elongated : the four terminal 

 joints in the male are equally enlarged, and each is about twice as long as the 

 7th joint ; the plates of the posterior coxae are suddenly dilated within, and are 

 broadly truncate at the extremity. I am unable to see the last joint of the palpi, 

 which Eschscholtz describes as ovoid. 



1. E. cristatus, nigro-piccus, griseo-pubescens, capite punctulato, fronte 

 tenuiter cristata, thorace antrorsum angustato subtilius dense punctato, linea 

 media vix distincta laevi, elytris parallelis punctatis, tenuissime striatis, anten- 

 nis pedibusque rufo-piceis. Long. -20. New York, one male specimen. 



2. E. can al i c ulatu s , nigro-piceus, griseo-pubescens, capite punctato, 

 subtilissime carinato, thorace lateribus parallelis, ante medium rotundatis, con- 



