138 RHYNCHOPHORA. 
Two specimens. Near the Guatemalan 7. didentatus, but with the elytra piceous 
or ferruginous and more rapidly narrowed posteriorly, the posterior legs in great part 
ferruginous, their femora armed with one or two teeth. 
TACHYGONIDILUS, gen. nov. 
Antenne with a 6-jointed funiculus and a very stout oblong-ovate club; posterior tibie elongate-triangular ; 
posterior tarsi enveloped in a dense brush of long hairs. 
Type, Tachygonus phalangium, Chevr. 
Two closely allied species are referred to this genus, which is readily distinguishable 
from Tachygonus by the characters given. Both insects are of comparatively large 
size. The type of 7. phalangium has been communicated by Dr. Aurivillius for 
comparison, and we give a figure of its posterior femur and antenna (Tab. VIII. 
fige. 26, 26 a). 
1. Tachygonidius dasypus, sp. n. (Tab. VIII. figg. 27, 27 a.) 
Subrhomboidal, broad, shining, black, the antennex, and the anterior and intermediate legs in part, ferruginous, 
the hind legs piceous, with the femoral spines rufous and the tibie castaneous ; sparsely clothed with 
long, erect, black setee and fulvous and white hairs and pectinate scales, the scales more closely placed 
on each side of the base of the prothorax, at the base and apex of the elytra, and along the apical two- 
thirds of the suture ; the under surface clothed in part with fulvous and white pectinate scales ; anterior 
and intermediate legs setose and squamose ; posterior legs densely clothed with long hairs and scattered 
sete, the hairs on the outer face of the femora mostly ochreous and those on the inner edge of the tibie 
black, the tarsal joints almost hidden in a dense brush of very long pale ochreous hairs. Head closely 
punctate; rostrum very stout, thickly punctate, except along the triangular, shining, median space. 
Prothorax coarsely, irregularly punctate, except along the smooth narrow median space. Elytra very 
broad, rounded-triangular, transversely depressed on the disc at the base, each with a large tuberculiform 
prominence near the suture towards the apex and a smaller prominence on the outer margin a little 
anterior to it, the humeri also swollen ; coarsely, irregularly seriato-foveolate, the foveee here and there 
transversely confluent, the alternate interstices somewhat raised anteriorly, 9 subcostate. Posterior 
femora very elongate, with three long, equidistant teeth, and a small tooth exterior to them. Posterior 
tibie broad, triangular, densely ciliate within. Third tarsal joint broadly bilobed. 
Length 5, breadth 35%; millim. 
Hab. Panama, Tolé (Champion). 
One specimen. A near ally of 7. phalangium, Chevr., from Cayenne, with three 
long, equidistant teeth on the posterior femora, the femora themselves densely clothed 
with ochreous hairs externally, the posterior tibia more dilated, and the posterior tarsi 
enveloped with a denser brush of ochreous hairs. 
Group CEUTHORRHYNCHINA. 
The North-American members of this group have been exhaustively monographed 
by Dietz [Trans. Am. Ent. Soc. xxiii. pp. 387-480, tabb. 12-14 (Sept.—Dec. 1896)], 
and his arrangement is here followed. ‘The Central- and South-American forms mostly 
belong to the section “Ccliodes.” The ‘“Ceuthorrhynchi” and “ Phytobii” are 
