288 HETEROMERA. 
antenne stout, very long, reaching to the middle of the elytra in the male, very slightly widening out- 
wardly, joints 8-10 long, the apical joint in the male rather longer than the tenth, piceous-black : 
prothorax very broad, strongly transverse, strongly margined, the margins thickened, the sides gradually 
converging from the base, and rounded and more rapidly narrowing from the middle to the apex, the 
anterior angles very broad and prominent and rounded, the apex deeply arcuate emarginate, the hind 
angles prominent, the base strongly bisinuate and immarginate, the basal fovez quite obsolete, the surface 
very shallowly, finely, and sparingly punctured (much more shallowly and finely so than the head); scutellum 
small, triangular, strongly transverse; elytra a little longer than the prothorax at the base, short, broad, 
gibbous, still more inflated in the female, strongly margined, rounded at the sides, the humeri not promi- 
nent, regularly punctate-striate, the punctures fine and distantly placed, the scutellar stria obsolete, the 
interstices flat or feebly convex and almost smooth; legs comparatively smooth, very stout, black; tarsi 
very stout, and still stouter and with the three basal joints of the anterior pair strongly and equally 
dilated in the male; beneath rather more shining, dark brownish-piceous ; metasternum short, exceedingly 
coarsely or rugulosely punctured, the side-pieces smooth; ventral surface longitudinally wrinkled, the 
first segment also sparingly punctured ; flanks of the prothorax almost smooth; intercoxal process broad, 
rounded and strongly margined in front; epipleure smooth, very broad at the base, gradually narrowing 
to the last ventral suture; prosternum very broad, shallowly grooved in the middle, a little declivous 
though broadly (but not strongly) produced and received by the deeply excavate V-shaped mesosternum, 
the sides of the latter vertical in front though rounded off above. Body apterous. 
Length 53-8 millim.; breadth 33-53 millim. (¢ 2.) 
Hab. GuatTEMALA, Chiacam, Sinanja, Panzos, and San Juan in Vera Paz (Champion). 
Numerous examples. This insect cannot be compared with any of the species here 
described ; it will be known by its subrotundate gibbous form, dull bronze-black colour, 
stout legs, strongly dilated male anterior tarsi, and other characters given above; in 
general shape I. enoplopoides resembles the Old-World genus Enoplopus. This species 
also is apparently confined to the forest-region of the Atlantic slope, and to elevations 
lying between 1000 and 3000 feet. 
TARPELA. 
Tarpela, ¥. Bates, Ent. Monthly Mag. vi. p. 272 (1870) ; Allard, Rév. Hélopides, L’Abeille, xiv. 
p. 4; Mittheil. der schweiz. ent. Ges. v. pp. 19, 56, & 236 (pars). 
Lamperos, Allard, loc. cit. p. 4; loc. cit. pp. 57, 241. 
I place a large number of heterogeneous species in this genus, including those referred 
to it by its original describer ; and also those included in it by Allard, with the exception 
of 7. inanis. The structure of the pro- and mesosterna as a generic character cannot, in 
my opinion, be considered to have the importance attributed to it by the author of the 
genus, unless supported by other characters. The numerous recently discovered Central- 
American species connect T. browni and T. tenwicornis with T. (Nautes) eximia, T. Sovei- 
pennis, I’. costata, &c.; these latter have the pro- and mesosterna formed as in Nautes— 
é. g. the prosternum horizontal and acuminately produced, the mesosternum horizontal, 
V-shaped, and with the strongly raised sides quite vertical in front. The seven species 
(including 7’. eximia) with the pro- and mesosterna thus formed are also very coarsely 
sculptured above and differ very markedly from Nautes. All the other species here referred 
to Tarpela have the pro- and mesosterna more or less declivous. Amongst the Central- 
