342 REVISION OF THE TENEBRIONIDiE OF AMERICA, 



the eye- is a deep groove, extending from the anterior margin of the eyes backward, then 

 down upon the side of the head at some distance behind the eyes, losing itself gradually 

 as it approaches the gula. The antenna? arc rather long, equalling the head and thorax. 

 The (inter joints are sub-quadrate, not transverse nor sub-perfoliate, the terminal joint be- 

 ing longer than the preceding and obtuse at tip, as in Polypleurus. 'I'h i epipleurae arc 

 entire. 



The appearance of this insect is tint of Helops, especially in tli • form of the head. 



G. cribratus, Lee, Proc. Acad. IX. p. 7">. 



Black, moderatelj shining. Thorax broader than long, sides rounded in front, very 

 feebly narrowed behind, hind angles reqtangular, base feebly bisinuate. Elytra twice 

 longer than broad, sub-parallel, moderately convex, with eight rows of rather large punc- 

 tures feebly impressed. The body is winged. 



Length ,5H inch. 



Rare in Texas. 



Another sp scies is in the Zimmerman cabinet, from Guinea. 



RHINANDRTJS, Lee. 

 Rhioandrus, Lee, New Species, p. lilt. 



The differences between this genus and Zophobas are slight, and a study of the Mexi- 

 can species may render it probable that these points may have merely specific value. 



R. gracilis, Lee, New Species, p. 100. 



Length ~r2-.l~> inch. 



From Cape St. Lucas, Lower California. 



CENTRONOPTJS, Solier. 

 Centronopus, Sol., Baudi e Truqui Studi Entom., \>. 358. 



The antenna- of this genus are longer than the head and thorax, the outer joints tri- 

 angular, the last oval and pointed. The opipleunc do not reach the apex of the elytra. 

 The anterior tarsi of the males are feebly dilated or thickened. The anterior tibiae of the 

 same sex are armed near the middle with a short tooth, and the tips of these and the 

 middle tibiae arc thickened. Tin 1 metasternum is lon<j and the body winged. Mentum 

 small, rhomboidal, narrower behind, middle prominent, angles acute. The anterior mar- 

 gin of front is thickened and slightly reflexed. 



C. calcaratus, Fab., (Helops) Syst. El. 1, 1">0. coraeinut, Enoch, Tenebrio) Beitr., 170; refiexus, ^.i\. 

 Teneb.) Joura. Acad. V.. p. 108. 



This rather abundant insect may be known by tin- peculiar thickening of the anterior 

 margin of the front, as well as by the sexual characters of the male. The thorax is some- 



