GRASIDIUS.—SMICRONYX. 129 
1. Grasidius longimanus, sp. n. (Tab. VIII. figg. 11, lla, 2.) 
Elongate-ovate, shining, ferruginous, thickly clothed with pallid appressed pubescence, the upper surface also 
with a coarse, semierect setosity. Rostrum about one-third longer than the prothorax, rugulose and 
pubescent at the base, smooth and glabrous beyond; joint 1 of the funiculus obovate, rather stout, 
2 shorter and more slender, 3-7 short and increasing very little in width. Prothorax convex, nearly as 
long as broad, rounded at the sides anteriorly, much narrowed in front, subparallel behind, the surface 
densely, minutely punctate. Elytra oblong-ovate, about one-third wider than the prothorax, a little 
flattened on the disc, conjointly rounded at the apex; very finely seriate-punctate, the interstices quite 
flat and minutely punctulate, each bearing a row of closely placed coarse sete, the setigerous impressions 
a little coarser than those of the strizx. 
Length 2? millim. (9.) 
Hab. Guatemata, Cubilguitz in Vera Paz (Champion). 
‘One specimen, in perfect condition. The vestiture of the upper surface is sufficiently 
dense to hide the sculpture, which cannot be seen till some of the hairs are removed. 
Sect. SMICRONYCHIDES. 
Desmorhines, Leconte; Desmori, Dietz. 
SMICRONYX. 
Micronyx, Schouherr, Gen. Cure. iii. p. 423 (1836) (nomen przocc.). 
Smicronyzx, Schénherr, op. cit. vii. 2, p. 818 (1843) ; Lacordaire, Gen. Col. vi. p. 490; Leconte, 
Proc. Am. Phil. Soc. xv. p. 169 (1876) ; Casey, Journ. New York Acad. Sci. vi. p. 382 (1892) ; 
Dietz, Trans. Am. Ent. Soc. xxi. p. 129 (1894). 
Pachytychius, Leconte, loc. cit. p. 168 (nec Jekel). 
Pachyphanes, Dietz, loc. cit. p. 115. 
Desmoris, Leconte, loc. cit. p. 167; Dietz, loc. cit. p. 121. 
Synertha, Dietz, loc. cit. p. 172. 
A holarctic genus, divided into four by Dietz (Joc. cit.), and very numerously repre- 
sented in North America *. Seven species are known to me from within our limits 
(and five of these by single examples), six belonging to Smicronyx or Synertha and one 
to Desmoris, the genus ranging as far south as Guatemala. These insects are easily 
recognizable by their subconnate, simple tarsal claws, the transverse groove at the base 
of the rostrum above, and the almost straight ventral sutures, the surface clothed with 
coarse, oval or piliform scales. Several of the European species are attached to Cuscuta, 
a genus of climbing, leafless, parasitic plants (numerous in Mexico), and it is not 
unlikely that this is the food of the American forms also. 
1. Smicronyx tectus, sp. n. 
Oblong-ovate, black, the tip of the rostrum, the antenne, and legs (the base of the femora excepted) more or 
less ferruginous ; the entire surface densely clothed with coarse, oval, overlapping scales, which are of a. 
pale brownish colour variegated with whitish, and also with scattered, decumbent, white sete, these 
becoming coarser on the elytra and arranged in a single series on each interstice. Rostrum strongly 
* Nine species only from North America have been seen by me. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 4, December 1902. SS 
