134 RHYNCHOPHORA. 
and closely punctate-striate, the interstices very narrow, the alternate ones somewhat raised. Posterior 
femora very elongate, armed with numerous scattered minute and three or four longer teeth, the third 
from the apex much longer than the rest. Posterior tibiz arcuate. 
Length 1,%,-2, breadth 14 millim. 
10° 
Hab. Paxama, David, Bugaba (Champion). 
Two specimens. In this insect the pectinate white scales are clustered into a narrow 
arcuate band below the black fascia on each elytron, extending down the middle of the 
disc to near the apex, and the posterior femora are armed with numerous long and 
short teeth. 
5. Tachygonus nigrocristatus, sp.n. (Tab. VIII. figg. 16, 16 a, b.) 
Broad ovate, very shining, black, the apex of the rostrum and the apical margin of the elytra ferruginous, 
the antenne, the anterior and intermediate tarsi, and the posterior pair at the tip, and the anterior tibiz 
entirely and the intermediate pair at the base, testaceous; clothed with a few scattered long, erect, 
blackish and white sete, the blackish sets on the prothorax wholly clustered into two fascicles on the 
basal portion of the disc, the sides of the head and prothorax and of the moso- and metasternum thickly, 
and the sutural region of the elytra very sparsely, set: with pectinate white scales; the vestiture of the 
anterior and intermediate legs fine and white, the hind legs thickly set with long bristles, which are 
almost wholly blackish on the femora and tibia. Prothorax closely, finely punctate, except along the 
broad, smooth, median space. LElytra very broad, rounded and excavate at the sides, blunt at the tip, 
depressed on the dise below the base, the humeri and subapical callosities prominent; punctate-striate, ' 
the punctures very coarse at the sides and fine on the disc, the interstices almost smooth, broad and flat 
towards the suture, 9 distinctly costate. Posterior femora moderately elongate, armed with one long* 
and three short teeth—2 curved and twice the length of the rest, 3 and 4 placed on the upper and 
lower edges respectively. Posterior tibiw rather broad, arcuate externally. 
Length 3, breadth 24, millim. 
Hab, GUATEMALA, Quiché Mountains between 7000 and 9000 feet (Champion). 
One example. A rather large, broad, comparatively smooth form, with two tufts of 
blackish sete on the prothorax, strongly nigro-setose hind legs, and quadridentate 
posterior femora, 
6. Tachygonus fasciculosus. (Tab. VIII. fig. 17, hind leg.) 
Tachygonus fasciculosus, Boh. in Schénh. Gen. Cure. v. p. 456°. 
Hab. MExico, between Oaxaca and Acapulco}. 
This species, the unique type of which has been communicated by Dr. Aurivillius, is 
the largest of the Central-American Tachygoni (length 8, breadth 22 millim.). It 
may be known by the very coarsely punctate-striate elytra, with raised alternate 
interstices, long, abundant setosity, and scattered pectinate scales, which are condensed 
into a tuft on each side of the suture below the base, the bifasciculate prothorax, 
the strongly quadridentate posterior femora, and the arcuate posterior tibia. 
* Broken off on the right femur. 
