330 REVISION OF THE I I •• EBRK i\ I DJE OF AMERICA, 



A. caudata, black, elongate, clotlie<l with ratlier l«>n^r brownish yellow li:i i i ~. Plead rather coarsely hut not 

 densely punctured. Thorax broader than long, narrower at b i c, coarsel] but not sparsely punctured; apex 



feeblj emarginate, angles rounded, base feebly rounded, angles nearly rectangular; si.lrs rounded, in front of middle 

 gradually narrou ing t • base. Elytra elongate oval, humeri moderately prominent, surface \\ iili striae of rather coarse 



punctures distantly placed; interstices sparsely punctured. Beneath) selj and sparsehj punctured. 



Elytra caudate, prolongation equal to the last abdominal segment; anterior femora with a small acute 

 tooth between the middle and apex. 



/'■ il , Elyti ' "I ire broadlj oval, not caudate; femora not toothed, 

 including cauda — . I s J inch. 



Two specimens from the Maricopa Desert. Arizona. 



Easil) known by the several characters. The thorax is less punctured along the me- 

 dian line and more densely along the sides. Bj the characters alreadj given this species 

 might, according to the usually received rules, be separated under a distinct generic name, 

 although here the variation from the type is no greater than that seen among the species 

 of Eleodes. The first joint of the hind tarsi does not here exceed the length of the two 

 following. 



STENOTRICHUS, Lee. 

 Stenotrichus, Lee, Class. Col. N. A., p. 289. 

 S. ruflpes, Lee, (Amphidora) Ann. Lye. V.. p. 136. 



This species differs from all our other Amphidora'. by the under surface of the body 

 being pale brownish or ferruginous, with the legs of the same color. The generic differ- 

 ences have already been sufficiently adverted to in the preceding tables. 

 Length .22-.44 inch. 

 Collected at San Diego, California. 



TKIBE XX — TENEBRIONINI. 



Mentum moderate or small, frequently trilobed in front, middle lobe sometimes promi- 

 nent. Ligula in general slightly visible, rarely very prominent. Mandibles bifid at tip. 

 Head somewhat variable in form, always free. Eyes reniform, transverse. Epistoma 

 prominent, more or less rhomboidal. Labrum not prominent. Antenna' usually thicker 

 toward the tip (rarelj slender), outer joints frequently perfoliate, third joint longer than 

 the following. Prothorax and elytra contiguous, the former feebly emarginate in front. 

 Scutellum small. Elytra feebly embracing the abdomen. Body winged or not. Tibial 

 spurs very small or scarcelj visible. Tarsi pubescent beneath. Middle coxae with dis- 

 tincl trochantin. 



The tribe as above defined includes the Coelometopides and Tenebrionides of Lacor- 

 daire, as united 1>\ Leconte, as well as Sitophagus and several new genera. The vestiture 

 of the tarsi is by no means uniform, and affords a means of dividing the tribe into two 



