OTIDOCEPHALUS. 233 
d’, Elytra with or without scattered intermixed white hairs 
(seriate and bristly in O. crinitus), the interstices, at most 
(except in O. castaneus), uniseriate-punctate. 
e’. Femoral tooth large, triangular. 
a’. Pronotum transversely rugose . . . . . . + + Species 35,36. 
6°. Pronotum sparsely punctured. . . . . . ~~ « Species 37-45. 
f°. Femoral tooth moderately large or small, triangular. 
c. General form elongate or moderately elongate; pro- 
thorax subcylindrical . . . . - os. . « « Species 46-55. 
d’, General form shorter ; prothorax subglobose anteriorly. Species 56. 
g’. Femoral tooth small, narrow, spiniform. 
e’. General coloration nigro-eneous. . . . . . . + Species 57. 
f’. General coloration black or piceous. . . . . « Species 58-64, 
g’. Head and prothorax black, the elytra testaceous . . Species 65. 
i. Eyes subcontiguous; femoral tooth small, narrow: species 
small. 
e". Elytra finely seriate-punctate . . . . . . . . . . Species 66. 
f’. Elytra almost or quitesmooth . . . . . . . . « . Species 67, 68. 
d‘, Elytra with scattered, curved, simple white hairs only, smooth; 
femoral tooth small, narrow: species small. . . . Species 69, 70. 
e’, Elytra with long, simple, bristly yellowish hairs only, smooth, 
castaneous or ferruginous, the entire body sometimes of this 
colour; femoral tooth small, narrow: species small . . . . Species 71. 
b’. Head with a supra-ocular ridge; elytra black, the head and prothorax 
rufous: speciessmall . . 2... 2 ee ee ew ee ew ee + «Species 72. 
b. Femora bidentate. . . . 1. ee ee ee ee ee we we ee «Species 73. 
1. Otidocephalus cupreus. (Tab. XIII. figg. 1, 1a, ¢.) 
Otidocephalus sp., Lacord. Gen. Col. vi. p. 570, nota 1°. 
Otidocephalus cupreus, Chevy. Ann. Soc. Ent. Fr. 1877, p. 175°. 
Hab. Mexico, Omilteme and Chilpancingo in Guerrero 4600 to 8000 feet (H. #. 
Smith), Oaxaca !2 (Sailé), Atoyac in Vera Cruz, Yolos in Oaxaca (Lohr, in Mus. 
Berol.). 
A peculiar species, recognizable at once by the prothorax not being narrowed 
behind, but with the sides straight and forming an almost continuous outline with 
those of the elytra. The general coloration is brassy, sometimes with a faint coppery 
tinge. The elytra are clothed with decumbent squamiform hairs, the vestiture of the 
rest of the body being piliform. The fifth ventral segment in the male is depressed 
in the middle behind and emarginate at the apex; in the female it is shallowly sulcate 
down the centre. The femoral tooth is small and triangular. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 4, August 1903. 29HH 
