HEGEMONA. 275 
shining ; the elytra more ovate, not grooved within at the base; the interstices broader 
and less convex on the disc, the second to the ninth confluent just before the apex and 
together produced into a broad rounded lateral prominence. 
15. Hegemona, costaricensis. (Tab. XII. fig. 5, 2.) 
Bronze, with a slight greenish tinge, very shining. Head very sparingly and minutely punctured, the epistoma 
defined posteriorly by a not very deeply impressed groove, the vertex sometimes with a shallow longitu- 
dinal impression, and the epistoma sometimes with a transverse one; prothorax subquadrate, as long as 
broad in the male, shorter in the female, the sides straight from the middle to the base, slightly narrowed 
in the apical third, the anterior angles rounded and produced in front, the surface very minutely, sparingly, 
and shallowly punctured; elytra globose-ovate, very strongly gibbous, a little wider than the prothorax at 
the base, the humeri not prominent, regularly punctate-striate, the interstices broad, flat on the disc from 
the base to the apex, convex towards the sides only, almost impunctate, the apices slightly produced ; 
beneath smooth, shining; apex of the prosternum subtuberculiform. 
Length 183-19 millim.; breadth 8-9 millim. (6 9.) 
Hab. Costa Rica (Sallé, Van Patten), Volcan de Irazu (Rogers). 
This species will readily be known by the broad, flat interstices and regularly punc- 
tate-striate elytra, the latter almost pear-shaped and raised considerably above the level 
of the thorax. 
16. Hegemona interruptus. (Tab. XII. fig. 6, 2.) 
Bronze, with a very slight greenish tint, shining. Head very shallowly, finely, and sparingly punctured, the 
groove separating the epistoma somewhat deeply impressed and subangularly extended in the middle behind, 
very shallow laterally ; prothorax broad, transverse, the sides slightly rounded and about equally narrowed 
at the base and apex, the anterior angles broadly rounded, the disc with a smooth narrow central line 
which is slightly raised at the base, the surface punctured like the head; elytra short, broad, strongly 
gibbous, rounded at the sides, the width of the prothorax at the base, deeply striate, the strie coarsely 
erenate-punctate (the punctures here and there confluent), the interstices strongly angularly raised (as 
in H. filebuster), greatly interrupted and more or less irregular beyond the middle and also at the sides, 
transversely or obliquely wrinkled within, and impunctate, the apices slightly produced ; beneath more 
shining, almost smooth ; apex of the prosternum produced into a rounded conical tubercle. 
Length 19 millim.; breadth 10 millim. (2.) 
Hab. Costa Rica (Van Patten). 
One example. This insect is allied to H. filibuster, but differs in the very coarsely 
punctured elytral striz, and the much more interrupted and irregular subangular 
interstices. 
17. Hegemona filibuster. 
Eucamptus flibuster, Thoms. Revue Zool. 1856, p. 475, t. 23. f. 4°. 
Hegemona flibuster, Allard, Mittheil. der schweiz. ent. Ges. v. pp. 61, 254”. 
Hab. ? Mexico (coll. Oberthiir, ex coll. Mniszech); British Honduras, Belize (Blan- 
caneaux); GUATEMALA, Lanquin (Champion); Nicaracua (coll. Brit. Mus., F. Bates, 
Sallé), Chontales (Belt, Janson); Costa Rica? ?. 
Many examples. JH. filibuster will be at once known by its very broad form, the 
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