HETEROMERA. 549 
the general shape of the former and the elytral sculpture of the latter. For the 
present, however, Oxidates can be retained for those species with foveolate elytra. In 
the form of the prosternum it approaches 0. gibbus. 
HEGEMONA (p. 267). 
Hegemona retrodentatus (p. 270). 
To the Mexican locality given, add :—Talea and Yolotepec, both in Oaxaca (Flohr). 
Two male specimens, agreeing well with Allard’s description. These differ from the 
same sex of the closely allied H. bicaudatus in their broader, more robust shape, and 
in the subangularly produced and slightly divergent apices of theelytra. It is probable 
that the apices of the elytra, as in H. hondurensis, are similarly formed in both sexes. 
Of H. bicaudatus an additional male example has been received from Coban (Conradt). 
5 (a). Hegemona refulgens. 
Elongate, somewhat compressed, the head and prothorax dark bronze, rather dull, slightly tinged with cupreous 
towards the sides; the elytra shining, bronzy-cupreous or cupreous, with the bottom of each of the 
grooves (more distinctly so when viewed laterally) more or less metallic green; beneath very shining, 
geneous, with coppery and metallic green reflections. Head almost smooth; antenne very elongate and 
slender; prothorax transversely convex, broader than long, subquadrate, the sides slightly converging in 
front and behind, the anterior angles rounded but rather prominent, the hind angles very obtuse, the 
surface smooth at the sides, very minutely, somewhat thickly punctate on the middle of the disc; elytra 
elongate-oval, slightly compressed at the sides, moderately gibbous, and produced at the apex, very deeply 
striate, the striae feebly punctured, the interstices considerably raised, very strongly and subangularly so 
towards the sides and apex, the fifth more or less elevated at the apex in both sexes (more distinctly so in 
the female, but not projecting beyond the apex of the elytra), the apices conjointly rounded; prosternum 
strongly produced, the apex raised; beneath almost smooth, the fifth ventral segment slightly depressed 
in the middle in the male. 
Length 21-25 millim. (¢ @.) 
Hab. Guatemata, Coban (Conradt). 
One female and three male examples. Allied to H. compressus and H. lineatus, but 
differing from both in the strongly, subangularly raised elytral interstices. ‘The thorax 
has the anterior and posterior angles very obtuse (as in H/. bicaudatus &c). ‘The elytral 
grooves are more or less metallic green at the bottom, this being more distinct when 
the insect is viewed from the side. 
In the subangularly raised elytral interstices H. refulgens approaches H. filibuster 
and H. interruptus; these latter, however, have broader and more gibbous elytra, 
with the interstices uneven. Mr. Conradt obtained specimens of five species of 
Hegemona at Coban. 
Hegemona chiriquensis (p. 273). 
To the localities given, add :—-Costa Rica (Mus. Brit.). 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, January 1893. 4 BB 
