232 RHYNCHOPHORA. 
NAUPACTUS. 
Leptocerus, Germar, Ins. Spec. nov. p. 417 (1824) ; Schénherr, Curc. Disp. Meth. p. 104 (nomen 
preeoce.), 
Naupactus, Schdnherr, Gen. Cure. i. p. 567 (1833), vi. 1, p. 1; Lacordaire, Gen. Col. vi. p. 66 
(part.). 
The genus Waupactus is here restricted to the winged forms only (type Curculio 
rivulosus, F.), Dr. Sharp having already (anted, p. 152) transferred the apterous ones to 
Pantomorus (=Aramigus and Phacepholis, Horn). Schonherr included 140 species 
in it, the winged representatives belonging to the Stirps IV. of his later work. The 
essential characters of the three Central-American forms known to me are as follows :— 
Rostrum broad, subquadrate, flattened, notched at the tip, the bare nasal plate extremely short, the scrobes 
lateral, sinuous, and descending to beneath the eyes, the latter stiictly lateral, convex, and very prominent, 
the head narrowly extended behind them; mentum small, transverse, almost filling the buccal cavity, 
arising from a short peduncle ; mandibles with a large scar in front; antenne long and slender, joint 2 
of the funiculus about twice as long as1, the scape nearly or quite reaching the front of the prothorax ; 
prothorax deeply sinuate and broadly margined (as seen from behind) at the base; scutellum small ; 
elytra much wider than the prothorax, sinuate at the base, with rather prominent humeri, 10-striate, 
the outer striz approximate from basal third ; femora clavate, unarmed, the anterior pair stout; anterior 
tibia denticulate; posterior tibia with the apex laminate and squamose, the glabrous articular surface 
cavernous and ascending ; tarsi with the basal joint rather long, the claws free; body winged, squamose, 
in life clothed with a powdery exudation. 
N. cinerascens, Perroud, from Guatemala, is unknown to me, but it is apparently 
winged and may be congeneric with the species from which the above characters 
are taken. Two of these latter have a corresponding apterous Pantomorus in 
Mexico. WN. sulfuratus was, in fact, sent us with Pantomorus stupidus from the same 
locality, and both insects in life are similarly lineate with a sulphur-yellow powdery 
exudation. This suggests a possibility that certain Pantomori may prove to be 
dimorphic, the presence of wings being correlated with well-developed humeri, the 
sinuation of the base of the prothorax and elytra, and a larger scutellum: if this 
proves to be the case, N. sulfuratus would be the winged form of Pantomorus stupidus 
and NV. virescens the winged form of Pantomorus uniformis. 
1. Naupactus sulfuratus, sp.n. (Tab. X. figg. 7, ¢; 8, 2, var.) 
Moderately elongate, narrow (¢), broad (@), nigro-piceous or black; the head on each side between the 
eyes, the prothorax with two curved vitte on the disc and another on each flank, and the elytra with 
a sinuous interrupted stripe on the disc (commencing and ending on the third interstice, and occupying 
more than half the length of the fourth), a broader stripe on the flanks, and sometimes one or two lines 
on the disc, densely clothed with small cinereous, and the rest of the upper surface more sparsely set 
with darker, scales, the head, prothorax, and elytra also with a short, rough, decumbent setosity ; the 
under surface (except along the middle of the abdomen) and legs cinereo-squamose and sparsely pilose. 
,Head and rostrum closely, finely punctate and sharply sulcate ; joint 2 of the funiculus twice the length 
of 1. Prothorax transverse, rounded at the sides, bisinuate at the base; densely, finely punctate and 
obsoletely canaliculate. Elytra much wider than the prothorax, sinuate at the base, the humeri some- 
what tumid; rather coarsely punctate-striate, the interstices feebly convex and densely punctulate. 
