and its Neo-Tropical Allies. 101 
directed backwards; rostrum rather stout, about as long 
as the prothorax, clothed with erect silaceous setiform 
scales; antenne pitchy; second joint of the funicle 
nearly twice as long as the first, the last three trans- 
verse; prothorax broader than long, moderately nar- 
rowed at the apex, the sides rounded, the base nearly 
straight, and narrower than the side, granules scarcely 
crowded; elytra convex, rising considerably above the 
prothorax, shortly obovate, striate-punctate, interstices 
shghtly elevated, each with a row of not very close glossy 
black granules; body beneath and legs with narrow 
scattered scales; femora stout; tibiz short, bimucronate. 
IRENARCHUS. 
Rostrum tenuatum, arcuatum ; scrobes laterales. An- 
tenne graciles, articulo ultimo funiculi discreto. Oculi 
ovati, laterales. Prothorax modice elongatus, basi 
bisinuatus, infra profunde emarginatus. Hlytra ovata, 
basi projecta, quam prothorace paulo latiora. Femora 
sublinearia mutica; tibie fere recte, apice mucronate ; 
tarst latiusculi; wngues connati. Metasternwm breve. 
Abdomen segmentis duobus basalibus ampliatis. 
The deep emargination of the propectus, allowing the 
rostrum to lie close to the under surface in repose, would 
seem to show an affinity in this genus to some of the 
apostasimerous groups. The type isa large and peculiar 
insect from Colombia, described by M. James Thomson 
under the name of Hilipus fossilis (Arcan. Nat., p. 259.) 
TARTARISUS. 
Femora incrassata, haud clavata, dente minuto in- 
structa. Tibie recte, compresse. Ceteris fere ut in 
Hilipodo. 
The type of this genus, Hilipus signatipennis, Blanch., 
and H. Hopei, Boh., which is unknown to me, are 
especially mentioned by Lacordaire as “ isolated forms,” 
which should form distinct genera. The differential 
characters of the former are found in the non-clavate 
femora and straight compressed tibie. 
