LONGICORNIA. 267 
HETERACHTHES (p. 33). 
2. Heterachthes eneolus. (Tab. XVIII. fig. 23.) 
Angustus, linearis, nigro-cneus, nitidus, sparsim setosus ; capite post oculos recte angustato ; thorace cylindrico 
fere levi; elytris postice attenuatis apice singulatim paullo prolongatis, sed apice ipso obtuso, sparsissime 
lineato-punctulatis ; femoribus modice clavatis; prosterno inter coxas haud depresso; antennis articulis 
°-6™ dilatatis (sublinearibus) nec carinatis, 7°-11™ tenuibus. 
Long. 34 lin. o. 
Hab. Mzxtico, Cerro de Plumas (Hége). 
Agreeing in structural characters, especially in the form of the antennal joints, with 
Heterachthes ebenus. The curious form of the head and the polished brassy surface 
give it a peculiar facies; but the species must be placed in | Heterachthes if this genus is 
to be retained as distinct from Lbidion. 
PHORMESIUM (p. 33; to follow the genus Heterachthes). 
Phormesium, Thomson, Syst. Ceramb. p. 217; Lacordaire, Gen. des Col. viii. p. 335. 
Ibidion, White, Cat. Long. Col. Brit. Mus. p. 222. 
Five or six species are known, all Tropical American. 
1. Phormesium virgulatum. 
Ibidion virgulatum, ante, p. 31. 
To the locality given, add :—Panama, Bugaba (Champion). 
The original description above cited was drawn up from a single female example and 
compared with the same sex of /bidion melanodacrys, White (not L. quadriguttatum, 
as inadvertently stated). Male examples since taken by Mr. Champion prove the 
species to belong to the genus Phormesium, which seems to form a natural group 
distinguished from ldidion by the antenne of the male being short (scarcely longer than 
the body) and having a thickened fusiform third joint. 
LAMPROMERUS (to follow the genus Heterachthes). 
Lampromerus, Thomson, Class. Long. p. 202; Lacordaire, Gen. des Col. viii. p. 350. 
A single species found in several of the West-Indian Islands constitutes this genus. 
1. Lampromerus pilicornis. 
Callidium pilicorne, Fabr. Ent. Syst. i. 2, p. 827°. 
Hab. Mexico (Sallé).— West Inpins!. 
A single female example in the Sallé collection. 
Supposed to be the Curtomerus luteus, Steph. Man. British Coleopt., described from 
a specimen introduced into Britain by commerce. 
2m 2 
