SYNOPSIS OF THE LAMIIN^E. 115 



four stiff liairs. Tliorax wider than long, stronjrly aiifiul'ite at middle of sides, 

 disc vafiuely bituberculate before tlie middle, surface finely punctulate and clotlied 

 with distantly placed l)lack hairs. Elytra nearly parallel, wider at base than the 

 thorax at middle, slightly convex ; finely punctulate with numerous large punc- 

 tures intermixed, from which proceed short, stitf, black hairs; sutural stria obso. 

 lete at base, well marked at apex, dorsal striaj obsolete; a vaguely marked ob- 

 lique depression starts at each humerus and disappears before it reaches the 

 suture. Elytral apices conjointly rounded, slightly dehiscent. Body beneath 

 piceous, punctulate, sparsely pubescent. Legs brownish, finely pubescent with 

 long, fine, brown hairs intermixed. Femora clavate ; tibiaj straight; tarsi broad, 

 densely pubescent beneath, without fringe of long hair at the sides. 



In respect to the form of the tarsi, this species is not congeneric 

 with our other Acanthoderes, but it otherwise falls within the limits 

 of that genus, and is readily distingui.shed by its uniform dark color. 

 A specimen in Dr. Horn's collection was examined by the late H. 

 AV. Bates, and by him thought to be allied to Tapeina. 



L,.400<'3IEIKUS Erichson. 

 This genus contains two species occasionally found in the extreme 

 south of our country, large robust in.sects, brown, marked with gray 

 pubescence. They may be separated by Dr. Horn's synopsis: 



Punctures of elytra barely attaining the middle, humeral region submuricate, 

 disc with very evident rows of short, erect scale-like hairs. 



araiicirorniiio. 



Punctures extending to apical fourth, humeral region simply punctured, disc 

 with feeble traces of tufts obsoletllN. 



Li. araneiroruiiM Linn, 1767 {Cerambyx), Sjst. Nat. ed. xii, j). 625 ; Dniry, 

 Ins. p. 66, pi. 35, fig. 4 (Acanthoflerus) ; Castle. In. Hist. Nat. ii, p. 462; 

 Thorns., Class. Long. pi. 1, figs. 1-8; Jacq., Duv. Hist. Cub. vii, p. 271, pi. 

 11, fig. 2 ; Chev., An. France, 1862, ser. 4, vol. ii, 247. 

 Length 19-23 mm. ; •.76-.92 inch. Habitat. — Florida, Mexico, Brazil, Tahiti, 

 San Domingo. Cayenne. 



Ij. obsoletiis Thoms., 1860, Class. Long. p. 10. 



Length 22.5-24 mm.; .90-. 96 inch. Habitat. — Mexico, Lower California. 



C<EX01»<ErS Horn. 

 C palineri Lee. 1873 (Leyjto.iO/Zo.s), New Species. S. M. C. No. 264, p. 233 ; Horn, 

 1880, Trans. Am. Ent. Soc. viii, p. 118, pi. 2, fig. 1. 



Length 18 mm. 9 - 25 mm. '^ ; .70 1.00 inch. //f(/>»7a<. — Arizona, So. California. 



Antennje black, each joint annulate with cinereous at base. Thorax sparsely 

 coarsely puiKitured. surface irregularly clothed with very fine ochreous pubes- 

 cence. Elytra about twice as long as wide at base, punctures moderatel.v coarse, 

 distant and irregular, surface without costse or tubercles, piceous black, with a 

 large discal saddle shaped space of ochreous pubescenc^c extending a little behind 

 the middle, behind which are large irregular spots of similar pubescence. - Body 

 beneath with extremely fine ochreous pubescence. Legs black, with very fine 

 black pubescence, tibiae with a cinereous band at middle. 



TKANS. AM. KNT. SOC. XXIII. APRIL. 1896. 



