COLASTUS. 273 
lateral margins forms a small free angular projection ; the female has no fovea on the 
last ventral plate; and in each sex the denticulation of the margins is very obsolete. 
The red mark on the elytra is conspicuous and nearly triangular, placed quite at the 
base. 
The insect above described agrees with a specimen in the National Collection named 
by Murray C. plagiatus, Erichson; but it does not agree at all satisfactorily with 
Erichson’s description, and I think it better to give our insect a separate name. Murray 
considered C. plagiatus to be itself only a variety of C. vudneratus, Er., but on this point 
I have not sufficient evidence. ‘The eight examples we have received of C. vestitus are 
no doubt all of one species, though they differ a little in size and in the extent of the 
red marks on the elytra. A specimen of C. vestitus from Venezuela is extant in the 
British Museum, labelled C. dimaculatus, var. minor by Murray; but it does not agree 
with the description of C. bimaculatus. 
9. Colastus mollis, sp. n. 
Minus latus, subdepressus, dense pubescens, fusco-niger ; antennis pedibusque rufo-testaceis, illarum clava 
fusca ; prothorace minus convexo, crebre fortiter profundeque punctato ; elytris crebre subtiliter seriatim 
punctatis. 
Long. 33-4 millim. 
Hab. Panama, Bugaba, Volcan de Chiriqui (Champion). 
Rather narrower and more depressed than C. latus, more finely punctate on the elytra, 
and densely pubescent. Thorax much narrowed in front, its punctuation close and very 
coarse, the hind angles not acute but furnished with elongate seta. Scutellum entirely 
covered, except at the hind margin, with punctures. Elytra with numerous closely 
placed series of punctures, the punctuation at the hind margin finer, closer, and less 
regular. Dorsal segments coarsely and closely punctured. 
We have received only two specimens, and though one of them is ferruginous in 
colour they are no doubt of the same species. Though similar to C. vestitus the 
differences in punctuation are well marked, and the form is more depressed ; the breast 
is broadly canaliculate in the middle behind. Both examples are males; the hind 
margin of the last ventral plate is very little angulate in the middle; the sides behind 
are furnished with four or five very distinct denticles. | 
10. Colastus levicollis, sp. n. 
Depressus, piceus, politus, pubescentie destitutus ; prothorace sparsim obsoletissime punctulato ; elytris remote, 
subtiliter seriatim punctatis; antennarum basi pedibusque testaceis. 
Long. 43 millim. 
Hab. Panama, Bugaba, Tolé (Champion). 
Thorax short and broad, greatly narrowed in front, the base sinuate on each side, the 
hind angles projecting slightly backwards, the surface polished and shining, with some 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, August 1889. 2 N* 
