276 NITIDULIDZ. 
Hab. PANAMA, Bugaba (Champion). 
We have received only one specimen, a female, of this insect; but there can be little 
doubt that it is a distinct species, and one that will be readily recognized by the 
sculpture. In form similar to C. datus, but more depressed, and with only so minute 
a pubescence that it appears to be glabrous. Thorax short, greatly narrowed in front, 
very coarsely punctate. Elytra very coarsely, densely punctate, the punctuation crowded, 
but quite regularly serial. Penultimate segment of hind body unusually densely 
punctate, the terminal segment coarsely and densely punctate; terminal ventral plate 
broad and short, without fovea. Channel on metasternum remarkably deep and broad. 
This insect has an oblique fovea within the hind angles of the thorax as in C. morio, 
C. lugens, &c.; but is smaller, and has the punctuation of the elytra coarse and close. 
17. Colastus denticulatus, sp. n. 
Minus latus, perdepressus, sublevigatus, nitidus, niger, elytris rufis, marginibus nigris, antennis piceis, pedibus 
sordide rufis; minus fortiter haud dense punctatus. 
Long. 3-34 millim. 
Hab. Mexico, Cordova (Sallé); British Honpuras (Blancaneaur); Guatemaa, San 
Gerdnimo, Chacoj, and San Juan in Vera Paz (Champion); Panama, Volcan de Chiriqui 
2500 to 4000 feet (Champion). 
Thorax truncate at the base, the hind angles slightly obtuse and a little rounded, the 
surface shining, sparingly and rather finely punctate. Elytra shining, with rather fine 
and not dense serial punctuation. Hind body with the last segment large, quite 
rounded at the sides, rather more coarsely punctate than the anterior parts. The male 
has the hind margin of the last ventral plate broadly but slightly excised, scarcely at 
all bisinuate, the lateral denticles unusually prominent, and the hind margin of the 
supplementary segment quite visibly denticulate ; in the female the denticles are much 
smaller. 
This in colour resembles the North-American C. semitectus, but that insect is larger, 
less depressed, more coarsely punctate, and much less shining. C. denticulatus is still 
nearer to C. amputatus, Er., but is of a different colour, and has the last segment of the 
hind body differently shaped. 
18. Colastus amputatus. 
Colastus amputatus, Er. in Germ. Zeitschr. iv. p. 243'; Murray, Trans. Linn. Soc. xxiv. p. 277, 
t. 34. f£. 3?. 
Hab. Mexico, Teapa (H. H. Smith), San Juan Bautista in Tabasco (Hoge); Nicaragua, 
Chinandega (Sallé).—Soutn America, Colombia 2, Brazil (coll. Sharp); ANTILLES, Cuba ! 
(coll. Sharp). 
