OF NATURAL HISTORY. 641 



Var. 13. Thorax with a hiteral abbreviated vitta on the anterior 

 margin : spot of the elytra slender, and nearer the suture. 



Dr. Harris sent me a specimen from Massachusetts. I have 

 obtained it on the common Hickory (Carya) in June. 



[Belongs to Hydnocera. — Lec] 



EXOPLIUM Latr. 



1. E. LATICORNE.— Black ; front and each side of the thorax 

 fulvous. [-Ig5-| 



Inhabits North Carolina. 



Body black, punctured : head fulvous : mouth, eyes and an- 

 tennae black ; the latter, with the three ultimate joints as broad as 

 long, subquadrate, narrowed at base, the last one oval : thorax 

 fulvous, of nearly equal width ; a transverse rectilinear, indented 

 line on the anterior submargin, and indented points each side : 

 elytra with regular striae of large punctures, much wider than 

 the interstitial lines. 



Length less than one-fourth of an inch. 



The only specimen I have seen was sent to me by Dr. Harris 

 for examination. 



[Belongs to Ichnea Lap. — Lec] 



2. E. DAMicoRNE F. (Till US.) — In his description Fabricius 

 says, "Antennarum articulis duobus ultimis dilato-compressis, 

 acutis," but there are, of course, three dilated ultimate joints. 



PTINUS L. 



P. HUMERALIS. — Beddish-brown ; thorax quadritubereulate ; 

 elytra with two bands widely interrupted by the suture. 



Inhabits Pennsylvania; Massachusetts, Harris. 



Head pale reddish-brown, with incumbent pale ferruginous 

 hair; vertex glabrous : thorax reddish-brown, with incumbent, 

 pale ferruginous hair; an acute, elevated tubercle on each side, 

 and two longitudinal obtuse ones on the disk, separated by a 

 groove : scutel with prostrate, cinereous hair : elytra dark red- 

 dish-brown, somewhat paler at base, with rigid elevated hairs and 

 regular striae of rather large, impressed punctures ; two remote 

 whitish bands interrupted at the suture. 



Very closely allied to P. fur ¥., but the body is los^ [166] 

 1835.] 41 



