594 RHYNCHOPHORA. 
convex. Elytra about one-half wider than the prothorax, narrowing from a little below the base, the 
shoulders rounded and rather prominent; coarsely seriate-punctate and sparsely granulate, the granules 
placed one on either side of each puncture, the interstices scarcely raised. Beneath coarsely, very 
sparsely punctate, the ventral segments 2-4 each with a single transverse row of punctures, 5 more 
closely and finely punctate, somewhat depressed at the middle, and with a dense cluster of long fulvous 
hairs on each side, Mesosternal walls broad and flattened, the cavity parallel-sided. Ventral segment 2 
very little longer than 3, the sutures deep. Legs short and stout, the femora unidentate. 
Length 63, breadth 33 millim. (¢.) 
Hab. Panama, Bugaba (Champion). 
One specimen, assumed to be a male. The large, subcontiguous eyes, with flattened 
facets, the strongly curved, long, tapering rostrum, and the broad, flattened walls of 
the mesosternum, sufficiently distinguish 7’. validus from the various other somewhat 
similar Central-American forms. 
2. Tyrannion tricristatus, sp. n. (Tab. XXIX. figg. 9, 9a.) 
Subovate, broad, dull, black, the antenn obscure ferruginous ; somewhat thickly clothed with small reddish- 
brown scales, the flanks of the elytra with a few whitish scales intermixed, the prothorax with a 
cruciform patch of coarser ochreous scales on the posterior lobe and three fascicles of long, erect, setiform 
scales (two at the apex and one on the disc), the elytra with a small rounded tascicle of short erect black 
scales at about the middle of the third interstice; the vestiture of the abdomen very sparse. Head 
rugosely punctate, obsoletely binodose above the eyes, the latter coarsely facetted and moderately distant ; 
rostrum strongly curved, subcylindrical, nearly reaching the metasternum, the basal portion dull, sparsely 
punctate, and very shallowly sulcate, the apical portion shining and sparsely, minutely punctate, the 
antenne inserted at a little beyond the middle, the funiculus rather stout. Prothorax transverse, 
obliquely and abruptly narrowed from the middle forwards, obtusely tridentate on each side; finely 
punctate, rugose on the flanks, and with three setigerous prominences—one on the disc, the other two 
at the apex. Scutellum rather large. Elytra one-half wider than the prothorax, subtriangular, convex, 
flattened on the disc anteriorly, the humeri rounded, swollen, and rather prominent ; finely, shallowly 
seriate-punctate, the punctures becoming deeper and oblong towards the sides, the interstices alutaceous, 
here and there feebly nodose, 3 slightly raised near the base, the patch of black scales arising from a 
small rounded prominence at about the middle. Beneath dull, sparsely punctate, Femora feebly clavate, 
sharply unidentate. 
Length 63, breadth 33 millim. (d.) 
Hab. Panama, Volcan de Chiriqui (Champion). 
One specimen. In this peculiar insect the prothorax is obtusely tridentate on each 
side and has three setigerous prominences on the disc (two at the apex and one at 
the middle), and the broad subtriangular elytra have each a small black spot near the 
middle of the third interstice. The metathoracic episterna are very broad. The first 
ventral suture is curved, and the second segment is as long as 3 and 4 united. 
8. Tyrannion fulvipennis, sp.n. (Tab. XXIX. figg. 11, 11a.) 
Subovate, black, the elytra (except at the tip) piceous; the antenne ferruginous; the elytra somewhat thickly 
clothed with fulvous scales and also set with numerous similarly-coloured suberect sete, with a few 
blackish sete intermixed ; the prothorax with four fascicles of erect black sete placed transversely across 
the midddle of the disc, and several other dark sete at the sides and apex ; the rest of the vestiture very 
sparse. Head rugulosely punctate, the eyes well separated; rostrum strongly curved, nearly reaching the 
