POLYDACRYS. 219 
3. Polydacrys mucronatus, sp. n. (Tab. IX. figg. 19, 19a, @.) 
Oblong-obovate, piceous, the antennee (the club exccpted) ferruginous; sparsely clothed with very small 
brown scales, the prothorax with a line of paler scales along each side of the disc, extending on to the 
base of the third elytral interstice ; the upper surface also set with numerous stiff, blunt, suberect, light 
and dark setee, which are uniseriately arranged down each elytral interstice, the legs strongly setose. 
Head and rostrum comparatively narrow, densely punctate, together about as long as the prothorax, the 
head feebly canaliculate, the groove extending forward to the v-shaped ridge on the rostrum, the nasal 
plate smooth ; eyes convex, laterally prominent; joint 2 of the funiculus shorter than 1. Prothorax 
nearly as long as broad, somewhat rounded at the sides, closely punctate and subgranulate. Elytra in the 
@ inflated and at the middle nearly twice as wide as the prothorax, narrower and more oblong in the d, 
with rows of closely placed, coarse, transverse punctures, separated by rather convex interstices, the 
interstices each with a few smooth scattered granules, the suture mucronate at the tip in the 9. 
Length 44-5, breadth 17-2 millim. (6 Q.) 
Hab. Panama, Bugaba (Champion). 
One pair. Closely related to P. sertegranosus, but with a relatively narrower head 
and rostrum ; a smaller prothorax, with the sides more rounded ; the elytra mucronate 
at the tip in the female, and with small scattered granules on the interstices; the 
mandibles with a shorter and smaller truncated process in front. 
4. Polydacrys nigrofasciatus, sp. n. (Tab. IX. fig. 20.) 
Oblong, black or piceous, the antenne in great part ferruginous ; thickly clothed with cinereous and blackish 
scales, the latter condensed into a median vitta (of variable width) on the prothorax (sometimes wholly 
wanting) and three, oblique or curved, transverse patches on each elytron, these markings sometimes 
confluent, or united into three common fascia, or partly obsolete; the upper surface also closeiy set with 
short, stout, erect, blunt, pallid sete, which are uniseriately arranged down each elytral interstice, the 
legs albo-setose. Head and rostrum densely punctate, together a little longer than the prothorax, 
the rostrum finely canaliculate down the middie to the v-shaped ridge; eyes large, moderately 
prominent ; joint 2 of the funiculus much shorter than 1. Prothorax broader than long, subcylindrical, 
slightly constricted at the base, densely, finely punctate. Elytra much wider than the prothorax, 
somewhat inflated posteriorly in the 2; with rows of closely placed, rather coarse punctures separated 
by feebly convex, rugulose, faintly uniseriate-punctate interstices. 
Length 33-42, breadth 13-14 millim. (¢ @.) 
Hab. Mexico, Salina Cruz and Tehuantepec in Oaxaca (nab, in U.S. Nat. Mus.) ; 
SaLvapor, Sonsonate (nad, in U.S. Nat. Mus.). 
Numerous examples, mostly from Tehuantepec. Smaller than any of the varieties 
of P. depressifrons, the eyes less prominent, the elytra closely set with short stiff sete. 
The markings are very variable, according to the predominance of the cinereous or 
blackish scales, the median vitta on the prothorax and the post-basal and subapical 
patches on the elytra being obsolete in light-coloured examples (leaving only a 
transverse curved mark just beyond the middle of each elytron), the darker individuals 
having the elytral fascie longitudinally coalescent (leaving a few scattered cinereous 
spots only) or transversely confluent. ‘The present species bears a superficial 
resemblance to the apterous Mitostylus gracilis, Horn. 
2FF 2 
