CYRSYLUS. . 307 
the base than the thorax, with a very shallow depression below the base, regularly punctate-striate, the 
punctures distinct nearly tothe apex; posterior femora strongly thickened ; the first joint of the posterior 
tarsi as long as the following joints united. 
Hab. Mexico, Vera Cruz (il. H. Smith), 'Teapa in Tabasco (Sallé, H. H. Smith) ; 
BRITISH Honpvuras, R. Hondo (Blancaneauz) ; GUATEMALA, San Isidro, Zapote, San 
Geronimo, Cahabon, San Juan in Vera Paz (Champion); Nicaragua, San Juan (Sal/é), 
Chontales (Janson); Panama, Volcan de Chiriqui (Champion). 
- Found in the greatest profusion at Teapa by Mr. Smith. The species is very 
variable in colour. 
2. Cyrsylus crassicornis. (Tab. XLII. fig. 17, 4.) 
Fulvous, the apical joints of the antennz black, and thickened (¢); thorax subquadrate, impunctate ; elytra 
metallic green, coarsely and closely punctured in rows. 
Length 1} line. 
3. Head fulvous, impunctate, the frontal tubercles broad; palpi slender; antenne very long, extending to 
two-thirds the length of the elytra, the lower five joints fulvous, the others black, the second joint half 
the length of the first, the following joints twice the length of the second, the last two joints dilated and 
slightly shorter than the preceding, the terminal one acutely pointed; thorax subquadrate, about one half 
broader than long, the sides strongly rounded, the angles slightly thickened, the posterior ones somewhat 
oblique, the surface impunctate, fulvous, the base with a slight depression in front of the scutellum ; the 
latter piceous ; elytra wider at the base than the thorax, metallic green, with a slight brassy gloss, strongly 
and closely punctured in double rows near the suture, singly so at the sides; underside and legs fulvous ; 
abdomen piceous, the last’ segment with a central furrow; anterior coxal cavities closed ; the first joint 
of the posterior tarsi as long as the following joints united. 
Hab. Guatema.a, San Gerdénimo (Champion). 
A single male specimen, at once distinguishable by the length and structure of the 
antenne. C. crassicornis is extremely like some of the species of Palcothona, and it 
has a depression at the base of the thorax in the centre as in that genus; the closed 
anterior coxal cavities will separate it, however, from Palwothona. 
8. Cyrsylus fulvipes. 
Fulvous; the head and thorax impunctate, the sides of the latter rounded ; elytra bluish-black, finely punctate- 
striate, with a slight depression below the base. 
Length 13 line. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
In this species, which resembles in all its essential characters the preceding one, the 
sides of the thorax are rounded, not straight; the thorax itself is scarcely one half 
broader than long, rather convex, impunctate ; the elytra are regularly and finely 
punctate-striate, bluish-black ; the underside and legs are entirely fulvous. The male 
has a very narrow longitudinal groove on the middle of the last abdominal segment. 
Four examples. 
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