CYLINDROCERWUS. 241 
smooth, the antenne inserted at about the middle, the antennal club stout, oblong-ovate, nearly as long 
as joints 2-7 of the funiculus united. Prothorax transverse, rounded at the sides anteriorly, strongly 
constricted in front, smooth. LElytra triangular, flattened on the disc, sharply striate, the stris feebly 
punctate, the interstices flat. Beneath closely punctate, a broad space down the middle of the metasternum 
and abdomen smoother. Prosternum bifoveate in front. 
$. Prosternum armed with two short spines, and with a deep circular cavity between them ; first ventral 
segment flattened or depressed in the middle. 
Q. Prosternum unimpressed in front of the anterior coxe. 
Length 3-4, breadth 11-2 millim. (¢ 2.) 
Hab. Mexico, Toxpam (Sallé: ¢); Guatemata, Cahabon in Vera Paz (Champion: 
2); Nicaragua, Chontales (Belé: ¢ 2); Panama, Bugaba (Champion: ¢ ). 
Six specimens, perhaps belonging to more than one species. The pair from 
Chontales may be taken as the types, and both have the white pleural band interrupted. 
In the two males from Bugaba this band is complete, whereas in the other four 
examples it is more or less wanting on the first ventral segment. The single male from 
Mexico has a deeper ventral depression than the others. The prothorax is more 
constricted in front and more rounded at the sides than in the allied forms. 
7. Cylindrocerus longipennis, sp.n. (Tab. XIII. fig. 28, 2.) 
Elongate-rhomboidal, flattened above, shining, black; the elytra with a dense rounded patch of elongate, 
narrow, whitish scales at the base of the third interstice, the rest of the surface almost bare. Head 
closely punctate; rostrum longer than the head and prothorax, rather slender, thickened and closely 
punctate towards the base, the apical half smooth, the antenne inserted at about the middle, the antennal 
club oblong-ovate, stout, as long as joints 2-7 of the funiculus united. Prothorax conical, broader than long, 
rather strongly constricted in front; sparsely, minutely punctate. Elytra about two and one-third times 
the length of the prothorax, triangular, here and there transversely depressed on the disc, the humeri 
rounded; deeply striate, the striz feebly punctate, the interstices smooth and flat. Beneath somewhat 
closely, the sides of the meso- and metasternum more coarsely and densely, punctate. Prosternum deeply 
bifoveate in front and broadly depressed thence to the anterior coxe, the latter rather narrowly separated. 
Posterior femora not reaching the apex of the abdomen. 
Length 54, breadth 24 millim. ( 2.) 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
One specimen. The elongate, uneven elytra, the patch of white scales at the base 
of the third elytral interstice, the immaculate under surface, the deeply bifoveate 
prosternum, and the stout, oblong-ovate antennal club distinguish C. longipennis. ‘The 
prosternal depression is shallow and without definite margin. ‘There are a few white 
scales on the metathoracic episterna and the sides of the abdomen, perhaps vestiges 
of spots. 
g. Cylindrocerus lissonotus, sp. n. (Tab. XIII. figg. 29, 29 a, 4, 3.) 
Oblong-rhomboidal, flattened above, very shining, black; an oval spot at the base of the third elytral 
interstice, a curved transverse streak in front of each anterior coxa, an elongate streak on the metathoracic 
episterna, and a spot at the sides of the second ventral segment, thickly clothed with pure white scales, 
the rest of the under surface also with a few scattered smaller white scales. Head very finely punctate ; 
rostrum longer than the head and prothorax, stout, becoming more slender and almost smooth in its 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 5, May 1908, OI 
