12 HETEROMERA. 
C. vitticolle the very differently sculptured elytra distinguish it at once. A well-marked 
specimen from Cache is figured. 
OTHRYADES. 
Last joint of the maxillary palpi subsecuriform, that of the labial palpi broad and triangular; mandibles fur- 
nished at the apex with three teeth of equal length; outer lobe of the maxille extremely broad and large, 
the inner lobe narrow; ligula very broad, fan-shaped, and extending laterally beyond the anterior angles 
of the mentum; mentum transverse, angularly extended on each side in front; eyes large, convex, 
rather widely separated above and beneath ; head strongly and obliquely constricted behind into a neck, 
without transverse impression between the eyes ; antenne long, exceedingly slender, joints 3-10 each a little 
thickened at the apex, very elongate, 3 about twice the length of 2 (11 broken off); prothorax cylindrical, 
completely immarginate and feebly compressed at the:sides ; elytra very long, parallel to about the middle 
and thence to the apex converging ; anterior coxee moderately exserted, the prosternum very narrowly 
raised between them; metasternal episterna with a narrow deep groove along the inner margin, the 
groove turned abruptly outwards in front and continued along the anterior margin ; legs long and slender, 
the femora not clavate, the tibie rounded on their outer edge and with indistinct spurs. 
A single species only, from the State of Panama, is referred to this genus. O. fragili- 
cornis, in the structure of the oral organs and some other particulars, closely approaches 
certain species here referred to Colparthrum (C. sulcicolle &c.), but differs from these 
in the non-clavate femora, large eyes, and exceedingly slender antenne. Othryades 
should be placed near the Australian genus Xenostethus. 
1. Othryades fragilicornis. (Tab. III. fig. 24,3; 24a, labium; 244, maxilla 
and maxillary palpus; 24 c, mandible.) 
Very elongate, convex, subparallel, shining, brownish-piceous or dark castaneous, the elytra «neous. Head 
with a few very fine setiferous punctures at the sides and base, for the rest smooth, the eyes convex and 
large, the space between them flat; antenne ferruginous, long, exceedingly slender and with very elon- 
gate joints in both sexes (the apical joint broken off); prothorax cylindrical, longer than broad (sometimes 
a little shorter), the sides completely immarginate, a little rounded anteriorly, and moderately constricted 
behind, the hind angles prominent but rather obtuse, the apical margin sharply, and the basal margin 
moderately, raised, the disc shallowly transversely depressed behind, the surface smooth ; elytra with very 
shallow intrahumeral depression, rather coarsely punctate-striate to about the middle and beyond this very 
much more finely and shallowly so, the punctures not very closely placed, the stria (including the first) 
not extending to the apex, the interstices almost flat, the third with about six and the fifth with about 
three (scattered between the base and apex), the seventh with one (at the shoulder), and the ninth with 
three or four (near the apex), fine setiferous punctures, the apices mucronate ; beneath sneo-piceous, very 
shining, smooth ; legs long and slender, ferruginous, the femora usually more or less piceous, the latter 
smooth and glabrous. 
Length 97-12 millim.; breadth 2-3 millim. (¢ 92.) 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
Eight examples. This species may be distinguished from all the allied New-World 
forms by its remarkably slender and fragile antenne ; these organs are broken in all the 
specimens before me, not one possessing an apical joint. O. fragilicornis somewhat 
resembles Statira viridicollis in shape, but has the thorax more cylindrical, completely 
immarginate at the sides, and smooth, and the elytra mucronate at the apex, as well as 
having very differently formed palpi, antenne, &c. 
