198 RHYNCHOPHORA. 
18. Cyrionyx exiguus, sp.n. (Tab. XI. figg. 23, 23a, 3.) 
Subrhomboidal, rather convex, shining, black, the antennz (the club excepted) ferruginous ; the vestiture fine, 
close above, sparse beneath, long and piliform on the prothorax, somewhat squamiform on the rest of the 
surface: the prothorax ochreous or with a broad, oblique, ochreous vitta on each side ; the elytra black, 
more or less mottled with white, the white scales sometimes clustered into a small spot at the middle of 
the fourth interstice; the legs and under surface with scattered whitish scales. Rostrum shining, 
strongly arcuate, stout, slightly longer than the head and prothorax, very sparsely, minutely punctate, 
rugulose at the sides towards the base, the antennew inserted at a little behind the middle. Prothorax 
transverse, rapidly narrowing from near the base, strongly constricted in front; closely punctate, with a 
more or less distinct, smooth, raised, median line. Elytra triangular, deeply striate, the striw faintly 
punctate, the interstices somewhat convex and sparsely punctulate. Prosternum broadly sulcate. 
Ventral segments sparsely punctate ; 1 depressed down the middle and 5 obsoletely foveate in the ¢. 
Legs rather stout ; femora strongly dentate, the posterior pair not reaching the apex of the abdomen. 
Length 22, breadth 14 millim. (¢ 2.) 
Hab. GuatemaLa, San Gerdénimo (Champion). 
Three specimens, one with most of the fine ochreous vestiture of the prothorax 
abraded. 
19. Cyrionyx bilineatus, sp.n. (Tab. XI. figg. 24, 24a, 2.) 
Subovate, rather elongate, black, the elytra very shining, except at the shoulders; the prothorax with a 
sharply defined elongate streak on each side at the base and a stripe along the lower part of the flanks, 
the elytra with an elongate streak on the sixth interstice at the base and another on the disc at the apex, 
and the under surface, thickly clothed with white scales ; the rest of the prothorax, the humeri, and the 
mesothoracic epimera with small brown scales; the vestiture of the legs and rostrum sparse, white. 
Rostrum stout, strongly arcuate, longer than the head and prothorax, smooth down the centre and at the 
apex, rugulose at the sides, the antennae inserted at a little beyond the middle. Prothorax a little 
broader than long, gibbous, rounded at the sides, narrowed and constricted in front; densely, finely 
punctate. Elytra subtriangular, somewhat gibbous at the middle of the disc, constricted on each side 
behind the rather prominent humeri; narrowly striate, the strie faintly punctate, the interstices flat 
at the base and very sharply costate thence to the apex, almost smooth, the rugulose humeral region 
excepted. Legs elongate, rather slender; femora sharply dentate; anterior and intermediate tibi 
sharply, and the posterior tibie feebly, unguiculate. 
Length 3, breadth 12 millim. ( 9.) 
fab. Panama, Bugaba (Champion). 
One specimen only of this peculiar form has been obtained, recognizable by the 
sharply-defined continuous white streak running down the base of the prothorax and 
the base of the elytra, the gibbous prothorax, the very sharply costate, shining, elytral 
interstices, the long legs, &c. ; 
20. Cyrionyx acutecostatus, sp. n. 
Subovate, black, the elytra more or less variegated with rufo-piceous at the base, sides, and apex, the tibis 
and the base of the femora rufous, the rostrum partly rufescent ; the vestiture fine: the prothorax with 
a median line and a faint line midway between it and the outer margin, and the elytra with a donee 
oblong streak on the disc towards the apex, the apex itself, and several small spots placed in a transverse 
irregular series below the base, white ; the rest of the clothing of the prothorax and of the base of the 
elytra brownish, that of the under surface dense and white, the legs also with narrow white scales 
Rostrum stout, arcuate, a little longer than the head and prothorax, smoother in the © than in the +, 
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