OSORIUS. | 681 
Paz (Champion); Honpuras (Sallé); Costa Rica, Irazu 7000 feet (Rogers); Panama, 
Volcan de Chiriqui 2500 to 4000 feet (Champion). 
This species has a dull head, with scanty sculpture. The thorax is rather short, not 
so long as broad, the sides curvate and much narrowed behind, the hind angles very 
obtuse ; the surface with distant, coarse punctures, which are altogether absent from a 
short space along the middle. The elytra are rather longer than the thorax, and have a 
scanty subobsolete punctuation. 
Mr. Champion found a large series of this species at Panzos, and these examples 
exhibit very little variation; from the other localities we have received only a small 
number of specimens. The two examples from Honduras have the elytra piceous-red, 
and may possibly be distinct. 
11. Osorius crassus. 
Latior, cylindricus, niger, sat nitidus ; antennis pedibusque rufis ; capite dense coriaceo, opaco, parce punctato ; 
prothorace parce punctato, medio area lata laevigata, angulis posterioribus sat obtusis; elytris parce 
punctatis, subopacis. 
Long. 8-9 millim. 
Hab. Muxico, Cordova (Hége); Guatemata, San Gerénimo (Champion). 
Compared with 0. parcus this species is larger and much broader, and has considerably 
more elongate mandibles, and the hind angles of the thorax are less obtuse and not so 
depressed. In other respects the two insects are very similar. Three examples. 
12. Osorius mundus. (Tab. XVIII. fig. 4.) 
Osorius mundus, Sharp, Tr. Ent. Soc. Lond. 1876, p. 432°. 
Hab. Mexico (Flohr), Guanajuato (Sadlé), Cuantla (Flohr), Jalapa, Cordova, Cerro 
de Plumas (f/6ge). 
Although very closely allied to O. parcus, I have no doubt about this species being 
distinct. It is a narrower insect, and usually has red elytra and a coarser punctuation ; 
and, moreover, may always be distinguished by the narrower and differently sculptured 
head (the surface being less coriaceous, and therefore less dull, while the punctuation 
is closer and rougher, being more tuberculate, and nearly absent from a rather narrow 
indefinite space along the middle); by the mandibles being shorter, and the angles of 
the clypeus quite blunt. The anterior tibie are extremely broad. 
13. Osorius debilis. 
Angustulus, cylindricus, rufescens, nitidulus; capite, elytris apicem versus abdomineque plus minusve pices- 
centibus; parce punctatus, prothorace angulis posterioribus minus obtusis; mandibulis argute sat longe 
dentatis. 
Long. 5 millim. 
Hab. Panama, Volcan de Chiriqui 2000 to 4000 feet (Champion). 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, January 1887. 4 SS 
