PERIDINETUS. 175 
Two specimens, assumed to be male and female, one having the posterior tibie more 
sinuate than the other. Found in Dec. 1898, upon a species of Melastomacee, 
according to Prof. Biolley. The ground-colour, at first sight, appears to be olivaceous, 
and the vestiture of the faint, evanescent, elytral fascize bluish-white. ‘The much 
sparser and finer vestiture of the fascize and the closely punctured, less constricted 
prothorax separate P. melastome from P. trifasciatus. 
6. Peridinetus lateralis, sp.n. (Tab. X. fig. 19,194, 3.) 
Elongate, subfusiform, shining, piceous, the head, rostrum, antenne, mesothoracic epimera, and legs more or 
less ferruginous; the elytra with a space along their lower margin, the apex, a narrow, interrupted, 
subapical fascia, and various small scattered patches between this and the basal third, the metasternum 
(densely), the ventral segments 2 and 5 in part, a space down the middle of 1, and a spot on each side of 
3 and 4, and the outer half of the posterior femora, clothed with small, oval, pure white scales ; the rest 
of the upper surface, the flanks of the prothorax, and the mesothoracic epimera, with scattered, minute, 
hair-like, fulvous scales. Head dull, minutely punctate, narrowly sulcate between the eyes ; rostrum 
arcuate, stout, very sparsely, finely punctate; joints 1 and 2 of the funiculus equal in length. Prothorax 
conical, constricted at the sides in front; closely, finely punctate, with indications of a smooth, raised 
median line. Elytra elongate-triangular, obliquely depressed on the disc below the base; finely punctate- 
striate, the interstices almost flat, minutely punctulate, 3 narrowly costate near the apex. Ventral 
segments with the bare spaces smooth, 1 depressed down the middle. 
Length 74, breadth 3,5 millim. (¢.) 
Hab. Panama, Volcan de Chiriqui 8000 feet (Champion). 
One specimen, found in the bamboo-thickets high up on the Pacific slope of the 
Volcan de Chiriqui. More elongate than P. irroratus, the vestiture of the prothorax 
and of the base of the elytra very fine and uniformly fulvous, the apical two-thirds only 
of the latter mottled with patches of coarser white scales above. The elytra are 
rather narrower at the base than in P. trifasciatus and P. melastome, and the frontal 
sulcus is shallower and less extended. P. zinckeni, Ros., is another allied form. 
7. Peridinetus irroratus. (Tab. X. figg. 20, 20a, ¢.) 
Curculio irroratus, Fabr. Mant. Ins. i. p. 106°; Ent. Syst. i. p. 429°. 
Rhynchenus irroratus, Fabr. Syst. Eleuth. ii. p. 467 °. 
Peridinetus irroratus, Ros. in Schéuh. Gen. Cure. iv. p. 468‘; Chevr. Ann. Soc. Ent. Belg. xxvi. 
79°. 
Var. Peridinetus (Rhinobatus) marmoratus [marmoreus}] (Dej.), Chevr. loc. cit.*. 
Hab. Nicaragua, Chontales (Belt); Costa Rica, San José, Chirripo, Turrialba, La 
Laguna, Carrillo (Biolley), Azahar de Cartago, Savanillas de Pirris (Underwood) ; 
Panama (Boucard), Chiriqui (Ribbe), Bugaba, Volcan de Chiriqui (Champion).—Soutu 
America, Cayenne! , Brazil+, Para®. 
A common insect in Costa Rica and found, according to Prof. Biolley, on a species 
of Piper. In fresh examples the interspaces between the white patches on the dorsal 
surface of the head, prothorax, and elytra are thickly clothed with minute hair-like 
