PELECOTOMOIDES. 301 
within our limits, but of all of them very insufficient material has been obtained. The 
great variation in the colour of the pubescence in certain species has been noted by 
Lacordaire ; and large series af most of them are required before the specific variation 
can be properly understood. The males and females of two species only were known 
to Gerstacker. 
Our species may be tabulated thus :— 
Eyes very large, coarsely granulated, approximate ; antennze with the four basal 
joints simple (the fourth angularly produced within in the male). . . . . nubila. 
Eyes smaller, more finely granulated, distant. 
Antenne with the three basal joints simple . . . . . . . . . . « Uneata. 
Antenne with the five basal jomts simple . . . . . . .  bivittata. 
Antenne with the four basal joints simple, the fifth acutely produced 
within . 2... . ee ee ee ee ee ee. nebulosa. 
1. Pelecotomoides nubila. (Tab. XVI. figg.1,¢; 2, 24,9.) 
Trigonodera nubila, Gerst. Rhipiph. Col. Fam. Disp. Syst. p. 4 (¢)’. 
Hab. Mexico, Tehuantepec (Sallé); Nicaragua, Chontales (Belt); Panama, Bugaba 
(Champion).—Pert !. 
Five specimens—a pair from Tehuantepec, a female from Chontales, and a pair from 
Bugaba,—agree so nearly with Gersticker’s description of P. nubila that there can be 
little doubt they belong to his species. The eyes are very large, feebly emarginate, 
coarsely granulated, and in both sexes only separated by a narrow raised line. The 
antennee have their four basal joints simple; the second and the fourth joints are very 
short in the male, a little longer in the female; joints 5-11 have each a very elongate 
ramus in the male, and are very acutely serrate in the female. The Panama specimens 
have the elytral pubescence; interrupted by ill-defined transverse or oblong patches 
of a fuscous colour, the other examples being uniformly yellowish grey-pubescent. 
Gersticker particularly notices the ‘‘fronte inter oculos lineari ” as characteristic of his 
P. nubila; the male only of the species was known to him. Our specimens vary in 
length from 6-11 millim. 
2. Pelecotomoides lineata. (Tab. XVI. figg. 3, 3a, 2.) 
Q. Moderately elongate, brown, the elytra darker, densely and finely punctured, thickly pubescent; the 
pubescence on the head and prothorax golden or greyish-yellow, the prothorax with a well-defined median 
vitta (narrowed before and behind), and in one specimen a small oblong spot at the sides about the middle, 
brown-pubescent; the pubescence on the scutellum and elytra brown, the latter with a narrow, well- 
defined, longitudinal stripe extending obliquely from a little below the base to the suture just before the 
apex (and widening a little posteriorly) golden- or greyish-yellow-pubescent. Head small; the eyes widely 
separated, deeply emarginate, finely granulated ; antenne pitchy-brown with the three basal joints reddish, 
rather short, joints 1-3 narrow, 2 very short, 3 about twice as long as 2, subtriangular, 4-10 very strongly 
serrate; prothorax convex, about as long as broad, with the sides rapidly converging from the base, almost 
straight, a little rounded in front only, the hind angles acute, the basal lobe shallowly emarginate in the 
