26 RHYNCHOPHORA. 
RHYNCHITOBIUS, gen. nov. 
Caput elongatum. Prosterni epimera in medio a parte centro-sternali minute separata. Coxe intermedis 
latius distantes. Pectus prominulum. Pygidium obtectum. Unguiculi longius appendiculati. 
The wide separation of the middle coxz allows this genus to be identified at a glance. 
The rostrum is thick and elongate; the prosternum excessively short, the front coxe 
very elongate. Each elytron is much rounded at the inner apical angle, and in conse- 
quence of this a small part of the middle of the apex of the pygidium can be seen 
between them. 
1. Rhynchitobius longicollis, sp. n. (Tab. I. fig. 21.) 
Piceus, subvariegatus, pube depressa grisescente irregulariter dense vestitus ; antennis rufis ; pedibus lanuginosis, 
tibiis ex parte majore flavescentibus. 
Long. cum rostro 5 millim. 
Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 
Antenne with broad club, the terminal joint quite acuminate. Rostrum thick, 
straight, finely punctulate in front of the insertion of the antenne. Eyes widely sepa- 
rated, the space between them rather convex, hairy. ‘Thorax slender, very elongate, 
densely clothed with a pale griseous pubescence, and also bearing a few slender erect 
sete. Elytra also clothed with pale depressed pubescence, which conceals the colour 
and sculpture, the former probably somewhat variegate, the humeral part being, at any 
rate, considerably paler, the sculpture apparently coarse and serial but irregular. ‘Tarsi 
very thick. 
Of this remarkable insect we have received only three examples, all in a very fragile 
condition. They apparently represent the two sexes, one having the rostrum rather 
longer than the others. I think this individual may be a male; our figure is taken 
from it. 
HEMILYPUS, gen. nov. 
Caput post oculos haud constrictum ; rostrum breve, crassum. Antenne graciles. Tarsi articulo basali sequente 
duplo longiore. Prosternum post coxas minus abbreviatum, epimerorum apicibus haud conjunctis. 
Abdomen sutura prima ventrali profunda. 
This genus resembles the eastern Aderorhinus in appearance; the prosternum behind 
exhibits a triangular piece, the apex of which separates more or less widely the apices 
of the epimera. It differs from Hugnamptus by the head being elongate and less con- 
stricted ; the prosternum longer behind the coxe; the first ventral suture deep; the 
basal joint of the feet shorter; and the pygidium not so completely covered. It should 
be placed between Aderorhinus and Eugnamptus. 
