100 RHYNCHOPHORA. 
DINOCLEUS. 
Céentrocleonus, Leconte, Proc. Am. Phil. Soc. xv. p. 145 (1876) (nec Chevrolat). 
Dinocleus, Casey, Ann. N. York Acad. Sci. vi. p. 176 (1891). 
A genus easily recognizable by the two tubercles on the prosternum in front of the 
anterior cox and the sparsely spinose soles of the tarsi. Eleven species are known, 
all from the Southern United States, one of them extending into Western Mexico, 
whence one other is now added. 
1. Dinocleus molitor. (Tab. VII. fig. 4.) 
Cleonus molitor, Lec. Proc. Acad. Phil. 1858, p. 78°. 
Centrocleonus molitor, Lec. Proc. Am. Phil. Soc. xv. p. 146%. 
Dinocleus molitor, Casey, Ann. N. York Acad. Sci. vi. p. 183°. 
Hab. Norra America, Southern California!?%, Sonora!, Arizona? *.—MeExico, 
Guerrero (Baron ?). 
We have received a single specimen of this species from Mr. Baron, from Guerrero, 
agreeing well with another from California sent us by Mr. Wickham. 
2. Dinocleus dentatus, sp. n. (Tab. VII. fig. 5.) 
Elongate-ovate, moderately robust, somewhat shining, black, the minute spines along the apical margin of the 
tibiee ochreous ; above somewhat sparingly clothed with cinereous pubescence, which does not hide the 
punctures, and is here and there variegated with whitish, and denuded in places, so as to give a mottled 
appearance to the elytra, the prothorax with a sinuous whitish vitta on each side (leaving a broad, sharply 
defined, partially denuded, dark space down the middle of the disc); the under surface and legs somewhat 
densely clothed with whitish pubescence, with small, scattered, partially denuded spots, these becoming 
larger and more conspicuous on the first four ventral segments. Rostrum very stout, widened at the tip, 
coarsely punctate, the interspaces closely and minutely punctured, not carinate; second joint of the 
funiculus much shorter than the first and longer than the third. Prothorax (along the median line) 
about as long as broad, conspicuously tuberculate at the sides a little before the apex, so as to appear 
abruptly narrowed and constricted in front, the sides almost straight from the tubercle to the base; the 
surface uneven, strongly depressed in the middle at the base, irregularly foveato-punctate, the interspaces 
closely, minutely punctate; the anterior margin simply sinuate opposite the eyes and furnished with long 
vibrisse. Elytra elongate, much wider than the prothorax, a little rounded at the sides along the median 
third, subparallel towards the base, the apices considerably produced, the humeri rounded ; seriate- 
punctate, the punctures here and there larger and foveiform, the interspaces flat, rugulose, and each with 
a scattered series of minute granules. Prosternum with the tubercle in front of each anterior coxa small, 
completely covered by the white pubescence. 
Length 14, breadth 53 millim. ( 2.) 
Tab. Mexico, Pinos Altos in Chihuahua (Buchan-Hepburn). 
One specimen. In Captain Casey’s arrangement of the species (Ann. N. York Acad. 
Sci. vi. pp. 177, 178), this species would fall under his second group, from all the 
members of which it differs in the sparser and more mottled vestiture of the upper 
surface (which is not dense enough to hide the larger punctures) and the conspicuous 
denuded spots on the ventral surface. The narrower, less robust form, the more 
