84 HETEROMERA. 
** Anterior tibial spurs in the female subequal. 
23. Elzodes longicollis. 
Eleodes longicollis, Lec. Ann. Lyc. New York, v. p. 184°; Proc. Acad. Phil. 1858, p. 181; Horn, 
Rev. Ten. N. A. p. 311’. 
Eleodes haydenii, Lec. Proc. Acad. Phil. 1858, p. 186°. | 
Hab. Norra America, river Gilat, New Mexico?, Arizona?, Kansas?, Colorado 2, 
river Platte 2,—Mexico, Northern Sonora (Morrison), San Luis Potosi, Hacienda de 
Bleados, Parras, and San Pedro in Coahuila (Dr. Palmer). 
The specimens sent by Dr. Palmer have the elytra distinctly but finely punctate- 
striate ; but intermediate forms occur, and I prefer to consider them as merely varieties 
of E. longicollis. 
24. Hleeodes ponderosa. (Tab. IV. fig. 11, ¢.) 
Oblong ovate, very convex, black, shining. Head with some fine scattered punctures; prothorax strongly 
convex, a little broader than long, widest in the middle, about equally narrowed at base and apex, the 
sides rounded, feebly sinuate just behind the obtuse anterior angles, hind angles obtuse, with exceedingly 
fine scattered punctures; elytra somewhat elongate and attenuate in the male, shorter and more strongly 
rounded at the sides in the female, smooth or with scattered very fine punctures, sometimes with indica- 
tions of shallow longitudinal grooves; legs stout in the male; anterior femora unarmed in both sexes ; 
spurs of the anterior tibiee subequal; prosternum horizontal and produced behind into a short blunt tooth, 
rarely rounded and declivous behind. 
Length 18-28 millim. (¢ 9.) 
Hab. Mexico, Oaxaca, Tehuacan (Hoge), Yolos, Oaxaca (Sallé). 
Var. The thorax slightly constricted towards the base, the hind angles in consequence a little more prominent ; 
the prosternum rounded and declivous behind. 
Length 19-20 millim. ( 9.) 
Hab. Mexico, Presidio (forrer). 
A large convex species allied to H. longicollis and E. gigantea; from the former it 
may be known by its differently shaped thorax and less fusiform outline; from the 
latter by its comparatively shorter form and the less prominent anterior angles of the 
thorax. . ponderosa varies greatly in size and even in shape; the legs are very stout, 
especially in the male, in large examples, thinner in smaller specimens. Small females 
are often very puzzling; the variety from Presidio is probably not distinct from 
E. ponderosa. Sent in plenty by Hoge. 
25. Eleeodes ruida, (Tab. IIL. fig. 25, ¢ .) 
Blaps ruida, Say, Bost. Journ. Nat. Hist. i. pp. 151-203 (1835)*; Lec. Complete Writings of 
Thomas Say, ii. p. 656. 
Eleodes coriacea, Sol. Studi Ent. p. 2497. 
Eleodes rugulosa, Dup. in litt. 
Eleodes rugosa, Sturm, in litt. 
