various Central American Coleoptera. 131 
of the Dryophilini; the other, M. pulicariwm (under which 
various species, as already pointed out by M. Pic, were 
confused by the author), to the genus Petaliwm, Lec., of 
the Doreatomini. The characters of the genus Micrano- 
biwm, Gorh., were drawn from the two species: those 
referring to the structure of the antennae, head, and thorax 
having been taken from the Ozognathus, and that of the 
relative length of the abdominalsegments from the Petaliwm. 
The synonymy of O. exiguus is given below. O. mexicanus, 
Pic, is unknown to me. 
Ozognathus exiguus. 
Micranobium exiguum, Gorh., Biol. Centr.-Am., Cole- 
opt. iii, 2, p. 202 (nec M. exiguum, Gorh., Proc. Zool. 
Soc. Lond., 1898, p. 325). 
Ozognathus exiguus, Fall, loc. cit.; Pic, loc. cit. 
This insect has only been found at San Gerdnimo, 
Guatemala. It has been examined by Fall, who records 
three other species of the genus from the Southern United 
States, one of which has a horn on each mandible in the 
male. The Antillean specimens subsequently referred by 
Gorham to M. exiguum belong to two genera—Cryptorama 
(2) and Petaliwm, and of course have nothing to do with the 
Guatemalan Ozognathus. — 
*Ozognathus mexicanus. 
Micranobium (s. g. Durangoum) mexicanum, Pic, L’ change, 
xix, p. 183 (1903). 
Ozognathus mexicanus, Pic, Cat. Anobiidae, p. 17 (1912). 
“Luteo pubescens, robustus, latus, paululum nitidus, sub- 
convexus, brunneus sed ad suturam et apice rufescens, antennis 
testaceis; thorace transverso, postice dilatato-subrotundato ; elytris 
satis latis et brevibus, minute et dense punctatis, instriatis; pedibus 
testaceis; subtus corpore nigro. Long. 2, 6 m.” The subgenus 
Durangoum is characterised thus :—‘“‘ Prothorace minus late ad 
basin lateraliter sejuncto, antennarum articulis intermediis satis 
brevibus, ultimis modice crassis et submodice longioribus, distinctis.” 
Hab. Mexico, “ Sierra de Durango.” 
TRICHODESMA. 
Trichodesma, Leconte, Class. Coleopt. N. Am. p. 204 (1861), 
and Proc. Acad. Phil. 1865, p. 230; Gorham, Biol. 
