334 RHYNCHOPHORA. 
5. Homocleus xanthopus, sp. n. 
3. Similar to H. femoralis. Carina of pronotum more concave, disc irregularly depressed, with mesial 
globosity ; tubercles of elytron much higher, the second a little more forward in position, with a third, 
smaller, one between the second and the apex of elytron, seventh interstice more elevate than in 
H. concolor ; legs brown, femora ringed with grey and brown, tibiz with two narrow grey rings, greater 
part of first tarsal segment and claw-segment rufous, pubescent-grey. 
Length 5-64 millim. 
Hab. Costa Rica, Irazu (Rogers); Panama, Volcan de Chiriqui [type] (Champion). 
Four specimens. 
XVII. MONOCLGUS. 
Anthribus auctorum, partim. 
Monocieus, Jordan, Nov. Zool. xi. p. 255 (1904) (type: elaphrinus). 
Range: South and Central America. 
¢ 2. Rostrum without carina or only a vestige of it. Frons in a plane with rostrum, vertical. Eye 
prominent. Carina not or very little curved forward at sides. Mid coxw not round. Mesosternal 
process not angulate laterally. 
Key to the Central-American Species. 
a. Carina of prothorax curved forward to middle of sides. . . . . « + ~ + Species No. 4. 
Carina of prothorax very little curved forward at sides; elytron with three 
tubercles in third interstice. ©... ee eee ee ee ee B 
6. Elytra rufous, except a large proximal sutural area. . «© «© + ee ee Species No. 1. 
Elytra not rufous, pronotum with conspicuous mesial vitta . . . . + + : Species No. 3. 
Elytra not rufous, pronotum without conspicuous mesial vitta . . . . + - Species No. 2. 
1. Monocleus anas, sp. n. (Tab. XI. fig. 19.) 
¢. Rostrum rufescent, densely pubescent clayish-grey, dilated at apex, longer than broad. Frons about as 
broad as the club of the antenna. Eye strongly prominent. Occiput and pronotum black, rather 
sparsely pubescent luteous-grey. Pronotum nearly twice as wide at carina as at apex, carina situated at 
basal third, feebly concave, slightly curved forward at sides. Elytra rufous, a large sutural area brown, 
this area extending from base to second tubercle, including the latter, sparsely pubescent luteous-grey ; 
three rather large tubercles in third interspace, one near base, the second just before middle, and the third 
on apical declivity, besides some pustules in the third, fifth, seventh, and ninth interspaces. Underside 
black, pubescent-grey, the pubescence not dense. Legs rufescent-brown ; apical half of femora and basal 
half of tibiee and of first segment of tarsi rufous. 
Length 2% millim. 
Hab. Guatema.a, Totonicapam 10,000 feet (Champion). 
One male. 
9. Monocleus idzeus. (Tab. XI. figg. 20, 20.) 
Monocleus ideus, Jordan, Nov. Zool. xi. p. 258. n. 84 (1904) *. 
In some of the specimens the rostrum is densely pubescent luteous-grey. The ¢ bears on the inner side of the 
fore tibia, at the apex, a small brush-like lobe. 
