48 . . LONGICORNIA. 
5. Cyllene costaricensis. 
Clytus costaricensis, Thoms. Class. Céramb. p. 218. 
Hab. Costa Rica. 
6. Cyllene cayennensis. 
Clytus cayennensis, Laporte & Gory, Mon. Clyt. p. 10, t. 3. £.9!; Bates, Trans. Ent. Soc. 1872, 
p- 186’. . 
Hab. Nicaracva, Chontales (Belt ?, Janson).—Soutn America, Cayenne 1. 
Compared with an example from Cayenne, the numerous specimens taken by Mr. Belt 
and Mr. Janson show no important difference. This is the more remarkable, as in 
Venezuela, and again on the Amazons, the species has become modified into well-marked 
local forms. 
TRICHOXYS. 
Clytus (division Trichoxrys), Chevrolat, Ann. Soc. Ent. Fr. 1860, p. 454. 
Clytus (partim), Lap. & Gory, White. 
Fourteen species, all Mexican, are included by Chevrolat in this genus. It is doubtful, 
however, if they all really belong to it; 7. hartwegi at any rate must be separated, as 
it agrees neither in facies nor structure with the typical species. Trichoxys differs 
structurally from Clytus, as restricted by Chevrolat and Lacordaire (Gen. Col. ix. p. 67), 
in the depressed suture and longitudinal carine of the elytra, the prominence and ver- 
tical front edge of the mesosternum, and the stronger bristles of the basal joints of the 
antenne. In their general form and markings, moreover, the species are very different 
both from Clytus and all other genera of the group, and form a natural assemblage of 
forms, to which their circumscribed area of distribution gives additional definiteness. 
In 7. hartwegi the third to sixth antennal joints have a strong spine at the apex. 
This alone is perhaps not a sufficient warrant for generic separation, unless we are pre- 
pared to treat Cyllene nebulosa and antennata in like manner, which differ from all 
the other species at present included in the same genus by their spinose antenne. But 
Trichoxys hartwegi differs also in the form of the antenne and in that of the thorax and 
legs, especially the femora. 
1. Trichoxys bilineatus. 
Clytus (Trichoxys) bilineatus, Chevr. Ann. Soc. Ent. Fr. 1860, p. 461, t. 9. f. 11. 
Hab. Mexico, Oaxaca }. 
2. Trichoxys pellitus. 
Clytus pellitus, White, Cat. Col. Long. B. M. ii. p. 272}. 
Clytus (Trichoxys) pellitus, Chevr. Ann. Soc. Ent. Fr. 1860, p. 462. 
Hab. Muxico, Oaxaca (Hartweg) 3. 
