LONGICORNIA. 287 
Notwithstanding the difference in the form, length, and convexity of the elytra, this 
fine species is evidently a true Euryptera; the antenne, though rather more slender than 
usual, are clothed towards the base with the long silky hairs characteristic of the genus. 
RHATHYMOSCELIS (p. 41). 
Rhathymoscelis haldemani (p. 41). 
To the locality given, add :—Guatemata, Purula 5000 feet (Champion). 
The single example taken by Mr. Champion has the elytra, except the tips, testaceous 
yellow, and the membranous wings fulvous hyaline. 
The specimen was captured on the wing in the virgin forest. 
MERIONCEDA. 
Merioneda, Pascoe, Trans. Ent. Soc. ser. 2, iv. p. 237 (1857). 
Oxycoleus, Lacordaire, Gen. Col. viii. p. 484, 1869 (ante, p. 41). 
Stenoptrellus, Bates, Trans. Ent. Soc. 1870, p. 314. 
The structural characters of Merioneda and Oxycoleus in both sexes offer no essential 
difference; and united they form a well-marked and most interesting genus, allied to 
the European and North-American genus Callimus. Fourteen species are known, 
confined to the Indo-Malayan and Tropical American regions. 
2. Merioneda culicina. (Tab. XX. fig. 18.) 
Stenoptrellus culicinus, Bates, Trans. Ent. Soc. 1870, p. 315". 
Hab. Panama, Chorcha near San Lorenzo (Champion).—Sovutn America, Amazons }, 
A single ‘specimen of this species flew on to Mr. Champion’s neck while he was 
travelling on horseback through the forest of Chorcha. 
3. Merioneda gratiosa. (Tab. XX. figg. 163,179.) 
Nitida; capite supra grosse punctato, thorace antice modice angustato, supra 4-tuberculato, fere levi, antice 
parum angustato ; elytris postice valde angustatis divaricatis, apice acutissimis, dorso depressis sat grosse 
punctatis ; femoribus posticis longe pedunculatis, crasse et abrupte clavatis; tibiis posticis extus apice 
spina elongata armatis. 
3. Niger (thorace medio rufescente) ; abdomine sanguineo, femoribus posticis pedunculo fulvo-testaceo ; elytris 
viridi- vel cyaneo-eneis. 
Q@. Lete corallina; antennis, tibiis tarsisque posticis nigris ; elytris viridi-zneis, 
Long. 5-53 lin. 
Hab. Mexico, Cerro de Plumas (Hoge). 
Var. (?) 3. Differt corpore infra toto (prosterno antice nigro excepto) thoraceque sanguineis. 
Hab. Mexico, Ventanas (forrer). 
The male variety has the closest possible similarity to the typical form of the same 
