168 LENG AND HAMILTON. 



joint. Dr. Horn's male example from Florida differs from the fe- 

 male only in having slightly longer and slenderer antenna?, and in 

 having the apex of the last ventral segment pointed in the middle 

 and sinuated towards the sides, while in the female it is rather ab- 

 ruptly rounded. E. tomentosum bears a very strong resemblance to 

 £!. mucronotum Say, but may be distinguished by the much less close 

 punctuation of the elytra and sides of the prothorax" (" Gahan" j. 



Elaphidion cinereum Oliv. and E. lanatum Chev. were not 

 known in our fauna when Mr. Leng published his table of Elaph- 

 idion, but he has introduced them in a supplementary way (Ent. 

 Amer. vi, 214). The length of lanatum is 15.5 mm. = .62 inch., 

 and not as given by Mr. Leng. In both the femora are unarmed. 



Rhopahphora meeskei Casey, 1891, An. N. Y. Acad. Sci. vi, 30, 

 is a scarcely defined geographical race of longipes (Can. Ent. xxiv, 

 159). 



Rhopalophora biciucia Horn, 1895, Proc. Cal. Acad. Sci. ser. 2, v, 245. 

 Length 5 mm. = .-20 inch. Habitat. — Lower California (San Jose del Cabo). 



This is described from the female as black, rather dull, elytra with 

 a basal and postmedian narrow band of silvery white pubescence ; 

 antennje yellow, not longer than the body ; thorax as in i?. longipes ; 

 elytra parallel, scarcely wider than the thorax, apices 3 or 4 dentate, 

 surface closely cribrate-punctate ; beneath black, with patches of 

 silvery white pubescence ; legs piceo-testaceous, tibii« paler. This 

 species is placed in this genus for the present, but the discovery of 

 the male may suggest a new generic name. 



RHINOTROGIDES Lacordaire (Tribe VI, ss.). 



Distinct from Rhopalopiiorini by the anterior coxal cavities 

 closed behind ; it is represented in our fauna by one species. 



Acypliodores delicatus Horn, 1894, Coluop. Baja Cal. (Proc. Cal. Acad. 

 Sci. ser. 2, iv, 400). 

 Length 11 mm. = .44 inch. Habitat. — Lower California (El Taste). 

 The characters given are from the author's description. 



Slender, head and antennae yellowish, the latter half the length of the body, 

 stouter externally, sciipe coarsely punctate, third joint nearlj- as long as the next 

 three; thorax, length and breadth equal, wider at middle, black beneath and 

 densely punctured, base and apex bordered with black, disc reddish brown, con- 

 vex, densely punctate, a vague oblique umbone on each side of a feeble, smooth, 

 median line; elytra pale brownish testiiceous, yellowish white along base, subu- 

 late: abdomen pale piceo-testaceous ; legs I'ufo-testaceous, fenu)ra and basal half 

 of tibiffi yellowish. 



