'Soil REVISION OF THE TENEISIUONlDyE OF AMERICA, 



A. caudata, black, elongate, clothed with rather long brownish yellow hairs. Head rather coarsely but not 

 densely punctured. Thorax broader than long, narrower at base, convex, coarsely but not sparsely punctured; apex 

 feebly emarginate, angles rounded, base feebly rounded, angles nearly rectangular; sides rounded, in front, of middle 

 gradually narrowing to base. Elytra elongate oval, humeri moderately prominent, surface with strise of rather coarse 

 punctures distantly placed; interstices sparsely punctured. Beneath coarsely and sparsely punctured. 



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

 tooth between the middle and apex. 



Female. Elytra more broadly oval, not caudate; femora not toothed. 



Length .56 (% including cauda) — .48 9 inch. 



Two specimens from the Maricopa Desert, Arizona. 



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

 dian line and more densely along the sides. By the characters already given this species 

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

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

 of Eleodi 

 following 



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



STENOTRICHUS, Lee. 



Stenotrichus, Lee., Class. Col. N. A., p. 389. 



S. ruflpes, Lee., (Amphidora) Ann. Lye. V., p. 188. 



This species differs from all our other Amphidora 1 , 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. 



TUIBE XX — TENEimiONINI. 



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. Antennas usually thicker 

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

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

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

 spurs very small or scarcely visible. Tarsi pubescent beneath. Middle coxse witli dis- 

 tinct trochantin. 



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

 daire, as united by 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 



