236 RHYNCHOPHORA. 
1. Rhianopsis ferrugineus, sp. n. (Tab. XIII. figg. 22, 224, ¢ | 
Ferruginous, the anterior lobe of the prothorax and the rostrum piceous; glabrous above, the punctures of 
the under surface each bearing an extremely minute scale. Head finely punctate; rostrum thickly 
punctate and striate to the tip, the antennx inserted at a little behind the middle, the club ovate. 
Prothorax rather long, somewhat rounded at the sides, narrowing from the base, constricted in front, 
excavate behind the eyes beneath; the anterior lobe conspicuously punctate, the other portion with 
extremely minute scattered punctures. Scutellum shallowly sulcate. Elytra barely one-half longer 
than the prothorax, and at the sides forming almost a continuous outline with it, rapidly narrowing 
from a little below the base, depressed along the suture anteriorly ; finely punctate-striate, the interstices 
feebly convex, strongly so at the apex, and with very minute scattered punctures. Beneath sparsely 
punctate; prosternal sulcus very broad, reaching to the middle of the coxe ; ventral segment 1 flattened 
in the middle. Anterior tibiee ochreo-ciliate within from near the base to the apex. 
Length 5-6, breadth 23-31 millim. (¢.) 
Hab. Panama, Bugaba (Champion). 
Three specimens, all alike and apparently mature. A peculiar form, with the 
femora almost smooth (as in Lissobaris), the prothorax excavate opposite the eyes 
beneath, and the anterior tibie ciliate within ; the body very shining and almost bare; 
the rostrum long, stout, and rugosely punctate to the tip. 
LISSOBARIS, gen. nov. 
Rostrum curved, stout, moderately long, the scrobes rapidly spreading and becoming confluent beneath, the 
antenne inserted at the middle, the antennal club ovate and rather small; mandibles very short, 
emarginate within, closely fitting when closed; eyes transverse ; prothorax abruptly narrowed and 
tubulate in front, feebly sinuate at the base; scutellum small, free, transversely subquadrate; elytra 
elongate-triangular; pygidium not visible; prosternum unarmed, sulcate down the middle, the groove 
extending backward between the anterior coxw, the latter large, exserted, and narrowly separated ; 
mesosternum depressed ; femora unarmed, clavate ; tibiee strongly unguiculate at the apex; tarsi rather 
narrow, the claws long and divergent ; body convex, elongate-elliptic, polished, almost glabrous. 
Type, L. nigropiceus. 
The single species referred to this genus is very like Rhianopsis ferrugineus, but has 
differently-formed mandibles, narrowly separated, large, exserted anterior cox, unarmed 
femora, &c. The fully-developed male (as in various other Barids) has remarkable 
sexual characters, but these are in great part wanting in the undeveloped form, which 
is very like the female. 
1. Lissobaris nigropiceus, sp.n. (Tab. XIII. fig. 23, 23a, ¢; 230, inter- 
mediate leg, 3.) 
Nigro-piceous, shining, glabrous above, the depressed portions of the under surface with a few ochreous hairs, 
Head with scattered minute punctures; rostrum about as long as the head and prothorax, sparsely 
finely punctate. Prothorax a little broader than long, the sides rounded anteriorly and parallel bebind, 
the short anterior lobe narrow; the surface with excessively minute, scattered punctures. Seutalluss 
shallowly sulcate. Elytra slightly wider than the prothorax, compressed at the sides, excavate along 
the suture anteriorly, depressed on each side at the base, the humeri rounded, the apices separately 
rounded ; very finely or obsoletely punctate-striate, the sutural stria deeper, the interstices flat from the - 
base to the apical declivity, where they are sharply costate. Under surface and femora almost smooth. 
Tibie finely ciliate within, 
