168 Mr. G. C. Champion’s Notes on 
the more abrupt club of the antennae, with less thickened 
basal joints; the sharply margined, larger thorax; and 
the more strongly lobed penultimate tarsal joint, the insect 
in this respect more nearly approaching Lorelopsis. 
OTHNIIDAE. 
OTHNIUS. 
Othnius, Leconte, Class. Col. N. Am., p. 103 (1861); Horn, 
Trans. Am. Ent. Soc. 11, p. 132 (1868); Champion, 
Biol. Centr.-Am., Coleopt. iv, 1, p. 466 (1888). 
Six species of this genus from Central America were 
known to me in 1888; two others, one from Mexico, have 
since been found in the Fry collection. 
*Othnius immaculatus, n. sp. (Plate IV, fig. 13, 9.) 
Elongate, depressed, shining, aeneo-piceous, the elytra brown, 
the antennae, palpi, and tarsi, and sometimes the under surface also, 
ferruginous, the femora and tibiae reddish-brown; thickly clothed 
with brownish hairs. Head, thorax, and elytra densely, rather 
coarsely punctate; antennae (¢) reaching the base of the thorax, 
and with the three widened terminal joints distinctly longer than 
broad, (2) shorter and with the tenth joint transverse; head with 
the eyes slightly broader than (¢), or as broad as (2), the thorax, 
the eyes very large; thorax a little broader than long, about equal 
in width at the base and apex, the sides rounded and unarmed, the 
marginal carina becoming obsolete towards the apex, the hind 
angles subrectangular ; elytra long, wider than the thorax, subparallel 
in their basal half, the base depressed within the humeri. Beneath 
densely, minutely punctate, the coriaceous ventral sutures 1-4 very 
conspicuous. 
Length 53-61, breadth 1}-2 mm. (¢ 8.) 
Hab. Mexico (Truqui, in Mus. Brit., ex coll. Fry). 
Four specimens, the two with broader head and longer 
antennae (both injured by pinning) assumed to be males. 
This species and the following, O. planatus, differ from the 
known Central American forms in having the sides of 
the thorax completely unarmed and the upper surface of 
the body immaculate. O. umbrosus, Lec., from Nebraska, 
seems to be similarly coloured, but it is said to have the 
sides of the thorax feebly serrate. 
