ISCHNOCERUS. 307 
4. Ischnocerus metallicus, sp. n. (Tab. X. fig. 8.) 
3 2. Upperside clothed with an almost uniformly cinnamon pubescence, underside slightly more whitish, 
pubescence of tubercles partly brown, especially on anterior side of the same; derm of elytra metallic 
bluish-green. 
Rostrum short, not longer than apically broad, somewhat flattened, longitudinally rugate. Pronotum coarsely 
and rugosely punctured, with a discal impression divided by a mesial elevation raised to a black-pencilled 
median tubercle ; carina not angulate in middle, curved obliquely forward at sides, the sublateral portion 
slightly flexuose, not forming a distinct angle with the dorsal carina. Elytra with rows of very large 
punctures; four tubercles in third interspace, first very large, high, not divided, extending from the 
scutellar row of punctures to the fourth row, second larger than in the allied species, conical, the third 
interspace here widened, third tubercle rather farther away from apex than usual in this genus, large 
and high, the third interspace being here widened and the others correspondingly constricted, the fourth 
tubercle smaller than the second; fifth interspace with three tubercles, the first small, standing behind 
the large basal one, the second also small, placed in front of the third interspace, the third subapical, 
larger than the corresponding one of the third space, at the side of which tubercle it stands ; seventh 
interspace cariniform or tuberculate in front of apical declivity: these tubercles not so strongly tufted 
as in J. infuscatus. 
Length 4-7 millim. 
Hab. Nicaragua, Chontales (Belt); Panama, Bugaba [type], Volcan de Chiriqui 
(Champion). 
A small series. 
5. Ischnocerus championi, sp. n. (Tab. X. fig. 9.) 
g 2. Upperside clay-colour, underside slightly more grey ; tip of pronotal tubercle and frontal sides of elytral 
tubercles blackish-brown, sutural interspace and alternate lateral ones more or less tessellated with 
blackish-brown, partly greyish, or all the alternate spaces greyer than the others; pronotum with three 
irregular more densely pubescent lines, 
Rostrum short, a little narrower than in J. metallicus. Pronotum hardly with a trace of an impression, 
rugate-subpunctate, sides somewhat rounded before middle; carina nearly straight above, oblique, 
lateral portion also nearly straight, forming an obtuse angle with the dorsal carina, the tip of the angle 
rounded off. Elytra punctate-striate, the stripes of punctures distinctly impressed, sutural area not 
depressed on back, only feebly so on apical deelivity. the elytra being much more evenly convex than in 
all the preceding species ; basal tubercle extending from scutellar row of punctures to third stripe, divided 
at the second stripe, third interspace with two more tubercles, one before middle, the other before apical 
declivity, both small, besides a vestigial subapical tubercle ; fifth interspace with four small black or 
brown tubercles or traces of them; seventh and ninth interspaces subtuberculate before apex. 
Length 53 millim. 
Hab. British HonDURAS (Blancaneaux); GUATEMALA, Las Mercedes, Pantaleon, 
Zapote [type] (Champion), Panzos in Vera Paz (Conradt); PanamA, Caldera 
(Champion). 
6. Ischnocerus griseatus, sp.n. (Tab. X. fig. 10.) 
3 Q. Pubescence creamy-buff; a patch in the middle of each elytron black, occupying the third, fourth, and 
fifth interspaces, some specks behind it also black ; shaft of antenna and the legs slightly rufescent, much 
darker than in the other species of the genus. 
No tubercles on the thorax and elytra. Rostrum short. Eye less oblong than in the allied forms. Pronotum 
not impressed, sides hardly rounded between carina and apex; carina straight above, flexed forward 
laterally, with the angle strongly rounded. Llytra slightly depressed at suture, more so than in 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 6, Aprid 1906. 9SS 
