270 NITIDULIDA. 
Head broad, very coarsely punctured. Thorax transverse, nearly straight at the sides, 
very coarsely punctate, without pubescence, the punctures rather close. Elytra seriately, 
finely, and subobsoletely punctured, the pubescence very minute. Scutellum punctured 
at the base. Hind body delicately pubescent. 
This is closely allied to C. disignatws, an insect found in Venezuela. We have 
received a good series of examples, and it apparently is one of the least variable species 
of the genus; there are few males with front tibie greatly distorted (as is the case in 
C. bisignatus) among our series of C. guatemalenus, and the small spot of yellow in 
C. guatemalenus is in C. bisignatus so large as to occupy the greater part of the wing- 
cases; but it is quite probable that the two may be only local varieties of one species. 
Front tibie not at all angulate externally. (Subgen. Coxastus proper.) 
3. Colastus mimetes, sp.n. (Tab. VIII. fig. 13, 3.) 
C. postico fere omnino similis; rufus, nitidus, elytris nigricantibus, circa scutellum rufis, antennis fuscis, basi 
rufa; prothorace transverso, sparsim fortiter punctato, absque pubescentia, angulis posterioribus 
rotundatis. 
Long. 41 millim. 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
We have received only a single example, a male, of this interesting species ; though 
almost exactly similar to C. (Cyllopodes) posticus 2 , it is a male of the subgenus Colastus : 
the front tibiz are not angulate. The terminal segment is different in form from that of 
either sex of C. posticus, the fimbrie being very broad, and the general outline rounded 
instead of subacuminate, the sides on the ventral aspect being strongly denticulate; the 
hind margin of the ventral plate is bisinuate, as is usual in the males of Colastus, and 
the supplementary segment is of the form normal in Colastus proper. In respect of other 
characters all I can see to separate the species from C. posticus is that the insect is 
considerably more depressed, and the thorax a trifle more strongly punctate. 
The Brazilian C. decorus, Murray, is closely allied to C. mimetes: but is of more 
elongate form, has a less transverse thorax, and a more punctate scutellum. 
4. Colastus latus. 
Colastus latus, Murray, Trans. Linn. Soc. xxiv. p. 272, t. 34. f. 23. 
Colastus major, Reitter, Verh. Ver. Briinn, xii. p. 169”. 
Hab. Muxico1?, Cordova (Sallé), Jalapa (M. Trujillo); Guatmmata, Tamahu (Cham- 
pton); Nicaragua, Chontales (Janson). 
This species appears to be very variable in colour; it is apparently rare, as we have 
received only nine specimens. C. major, Reitter, is almost certainly founded on a colour 
variation ; though we have no specimen agreeing exactly with his description, our nine 
examples show five well-marked variations of colour, so that this is a character of very 
little importance. 
