BRACHYBELUS.—ISCHNOCENTRUS. 155 
BRACHYBELUS. 
Brachybelus, Stal, Kong). Sv. Vet.-Ak. Hand]. Band viii. 1, p. 48 (1869); Ofv. Kongl. Vet.-Ak. 
Forh. xxvi. p. 292 (1869). 
1. Brachybelus cruralis. (Tab. IX. figg. 18, 18 a.) 
Brachybelus cruralis, Stal, Ofv. Kongl. Vet.-Ak. Férh. 1869, p. 2927. 
Hab. Mexico, Vera Cruz (Mus. Holm.'), Amula in Guerrero 6000 feet, Atoyac in 
Vera Cruz, Teapa in Tabasco (H. H. Smith); Guatema.a, San Juan and Chiacam in 
Vera Paz, Cerro Zunil 4000 to 5000 feet (Champion); Panama, Volcan de Chiriqui 
2500 to 4000 feet (Champion). 
This species is one of the smallest of the Centrotine. It is an obscure dark little 
insect, with the pronotum clothed with griseous pubescence, and it may be known by 
the short pronotal process being partly buried in the tegmina, the absence of any 
pronotal horns, and the regular oblong apical areas of the tegmina. : 
A specimen from Teapa is figured. 
ISCHNOCENTRUS. 
Ischnocentrus, Stal, Ofv. Kongl. Vet.-Ak. Forh. xxvi. p. 292 (1869). 
This genus may be known by the peculiar posterior pronotal process, this being fine 
and sharp, sometimes almost straight, but usually very gently curved downwards, though 
occasionally a little reflexed, and stretching out like a small tail at a considerable 
distance above the scutellum, beyond the apex of which it is only slightly produced. 
1. Ischnocentrus niger. (Tab. IX. figg. 19, 19 a.) 
3. Ischnocentrus niger, Stal, Ofv. Kongl. Vet.-Ak. Foérh. 1869, p. 293°. 
9. Ischnocentrus ferruginosus, Stal, loc. cit.’ 
Hab. Panama, Bugaba, Volcan de Chiriqui 2500 to 4000 feet (Champion).—CotomBia, 
Bogota 1 2. 
I have not seen the types of Stal’s species, which appears to have been described from 
a single male and female; but from his description there can be little doubt as to the 
genus, and judging by the variation of size and colour in the small series from the 
Volcan de Chiriqui, I feel certain that they both belong to one species, At first I 
thought that the smaller specimens, which are unicolorous black, and range from 
3-34 millim. in length, were the males, and the larger ones the females, but one of 
the smaller ones, at all events, is a female. 
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