458 COLYDIIDA. 
1. Bitoma exarata. (Tab. XIV. fig. 19.) 
? Coniophea exarata, Pascoe, Journ. Ent. ii. p. 91, t. 5. fig. 8°. 
Depressa, parallela, brunnea, squamulis pallide ochraceis vestitus ; antennis pedibusque rufis. 
Long. 33-4 millim. 
Hab. Guatemata, El Reposo, Pantaleon, Zapote (Champion).—Amazons, Ega}. 
This remarkable insect is of the form and sculpture common to the majority of the 
species of the genus, but the punctuation is concealed by peculiar large, flat, clay- 
coloured scales, while the coste appear more elevated in consequence of being sur- 
mounted with a closely packed series of such scales. The disposition of the coste on 
the thorax and elytra is the same as in B. ornata. ‘The antenne are rather stout, with 
an abrupt two-jointed club. The structural characters seem to be entirely the same as 
in B. ornata. 
Pascoe! founded the genus Coniophwa for an insect the type of which I am quite 
unable to distinguish by examination of the upper surface from B. exarata. He 
remarks that it, “‘ except for its antennary grooves and the large basal segment of the 
abdomen, would approximate to Bitoma.” Our Central-American insect has neither 
of the characters mentioned by Pascoe, and until the under surface of his type 
be examined we cannot ascertain whether his remarks were based on erroneous 
observation, or whether C. exarata is structurally distinct from the Bitoma, which— 
in that case—it superficially exactly resembles. The former was I have no doubt 
the case. 
2, Bitoma socialis. 
Bitoma socialis, Pascoe, Journ. Ent. ii. p. 81’. 
Parva, angusta, depressa, fusca; antennis pedibus elytrisque testaceis, his vage longitudinaliter fusco 
marginatis. 
Long. 2-27 millim. 
Hab. British Honpuras (Blancaneaux); Guatemaua, Izabal (Sallé), Chacoj and 
Panima in Vera Paz, Zapote, El Reposo (Champion).—Amazons, Ega }. 
Antenne small, clear yellow, the club large. Head small, its front yellowish; epistome 
feebly emarginate in the middle and rounded on each side. Thorax parallel-sided, 
serrate at the edges; on each side of the middle are two sharply elevated coste, the 
outer distinctly flexuous, and along the middle with two sinuous flexuous ridges broadly 
interrupted on the middle. Elytra with the sculpture very coarse and the coste 
sharply elevated; their colour is yellow, but infuscate along the suture and outer 
margin, so that sometimes only a vague stripe along the middle of each remains yellow. 
Underside of head with the eyes large and less widely distant than in the allied 
species. | 
A very large series of this species was obtained at Zapote; there are a few speci- 
mens of an entirely testaceous variety amongst the examples. Our specimens quite 
