AMERICAN ENTOMOLOGY. 109 



latter edged with testaceous : feet black : anterior pairs of tibia) 

 often piceous. 



Obs. This species is somewhat smaller than M. quadrimacu- 

 latus. It is closely allied to M. tricolor. The second joint of 

 the antennae of the male is dilated and irregular. Mr. Thomas 

 Nuttall first obtained specimens of the vittalus in the Mississippi 

 region, where I have since met with it. 



The upper figure of the plate. 



Malachius OTIOSUS. — Specific character. Thorax rufous, 

 with a dilated longitudinal line ; antenna? and elytra black. 



Malachius n/igripenms nobis, Journ. Acad. Nat. Sciences, vol. iii. 

 p. 184. 



Desc. Body black, inconspicuously hairy : head with three 

 obtuse indentations between the eyes ; antennae black ; labrum 

 and clypeus before, rufous : thorax rufous, with a much dilated 

 black line from the anterior to the posterior edge : elytra black, 

 with a very slight violaceous tinge : pectus pale rufous, or testa- 

 ceous ; origin of the feet black : postpectus black : venter black, 

 segments with more or less dilated, sanguineous margins ; some- 

 times entirely sanguineous: feet black; anterior thighs some- 

 times pale. 



This species is readily separable from 31. nigric&ps by its infe- 

 rior size and blackish elytra and antennae, and by the circum- 

 stance that the black line of the thorax is continued to the 

 anterior edge. 



Count Dejean informs me the name nigrvpennis is preoccupied 

 in this genus ; I have therefore been compelled to change it. 



The lower middle figure. 



[Belongs to Anthocomus Er. — Lec] 



PHILANTHUS. Plate XLIX. 



Generic character. Labrum concealed; eyes not extending to 

 the posterior part of the head, very slightly emarginate ; stem- 

 mata three ; antenna) thicker towards the tip, inserted in the 

 middle of the face; nasus trilobate; mandibles simple; radial 

 cell one, elongated, acute at tip; cubital cells three, the first 

 large, the second small, sessile, receiving the first recurrent ner- 

 vure, the third subquadrate, elongated at its exterior inferior 



