312 HETEROMERA. 
within ; the legs longer and more slender; beneath smoother, the side-pieces of the metasternum more 
finely punctured, the flanks of the prothorax very finely and shallowly wrinkled within and smooth with- 
out; the prosternum rounded off and declivous behind, the apex unarmed; the mesosternum feebly 
excavate. 
Length 12 millim. (of the elytra 9 millim.); breadth 43 millim. (¢ ) 
Hab. Guatemata, Totonicapam 10,000 feet (Champion). 
One example only of this exceedingly distinct species was obtained. 
42. Tarpela docilis. (Tab. XIII. fig. 20.) 
Oblong ovate, narrow, rather convex, subparallel, dark bronze, shining. Head short, coarsely, irregularly, 
and somewhat closely punctured, rather deeply transversely impressed in front; antenne rather short, 
the penultimate joints widening a little outwardly, the apical joint in the male rather longer than the 
tenth; prothorax narrow, broader than long, strongly but narrowly margined, widest at the base, the 
sides a little sinuous but not narrowing behind, and slightly narrowing and rounded in front, the 
anterior angles broadly rounded and not prominent, and a little deflexed, the apex almost straight, the 
hind angles rectangular, the base feebly bisinuate and a little produced in the middle, the basal foveve 
moderately deep, a rather deep (or shallow) sinuous transverse impression on the disc before the base, and 
a shallow rounded impression on each side near the middle of the lateral margin, the surface coarsely and 
closely punctured, the punctures more scattered at the sides and base ; elytra wider than the prothorax, 
long, subparallel to far beyond the middle, the humeri rounded but a little prominent in front, with rows 
of shallow rather distantly placed rounded or oblong impressions, the impressions towards the sides placed 
in very shallow larger excavations, and becoming much finer towards the apex, the interstices flat and 
finely and sparingly punctured; legs rather short, the tibie somewhat closely punctured, the femora 
almost smooth; beneath shining, very shallowly, finely, and sparingly punctured, the metasternum with 
a few coarse scattered punctures at the sides, the flanks of the prothorax coarsely punctured, the ventral 
segments similarly sculptured, and the apical one hairy in the middle, in both sexes; prosternum strongly 
declivous behind, the apex unarmed ; mesosternum declivous, very feebly excavate. 
Length 73 millim.; breadth 3-33 millim. (¢ 2.) 
Hab. Mexico, Jalapa (Hoge), Cordova (Sallé). 
Two examples, apparently male and female. This species is not very nearly allied 
to any other noticed here; it perhaps comes nearest to 7. cisteliformis, from which it 
is separated by its smaller size, shorter antenne and legs, more parallel form, closely 
punctured and less transverse thorax (the anterior angles of which are broadly rounded), 
declivous prosternum, &c. The immature specimen (female) from Cordova has the 
head and thorax less coarsely punctured, the basal impression on the disc of the latter 
much shallower, and punctures of the elytral series more closely placed. 
HELOPS. 
Helops, Fabricius, Syst. Ent. p. 257 (1775); Lacordaire, Gen. Col. v. p. 450 (1859); Horn, Rev. 
Ten. of Am. north of Mexico, p. 391 (1870) (pars); Trans. Am. Ent. Soc. viii. p. 152 (1880) 
(pars) (nec Allard). 
Coscinopter, Allard, Rév. Hélopides, L’Abeille, xiv. p. 4 (1876) (nomen preoc.). 
Coscinoptiliz, Allard, Mittheil. der schweiz. ent. Ges. v. pp. 16, 33, & 127 (1880). 
Stenomax, Allard, Rév. Hélopides, L’ Abeille, xiv. p. 4; Mittheil. der schweiz. ent. Ges. v. pp. 17, 
33, & 180. 
