72 
HETEROMERA. 
New Providence (Bahamas), and a third from Nicaragua; an allied genus (Scotinus) is 
found in Brazil. 
1. Branchus obscurus. (Tab. III. fig. 20.) 
Branchus obscurus, Horn, Proc. Acad. Phil. 1866, p. 398°. 
Hab. Mexico (coll. F. Bates); GuaTEMALA, near the city (Champion); Nicaraaua?. 
ANECTUS. 
Anectus, Horn, Proc. Acad. Phil. 1866, p. 399; Rev. Ten. N. A. p. 291 (1870); Lec. & Horn, Class. 
Col. N. A. p. 371 (1883). 
This genus is unknown to me. 
1. Anectus vestitus. 
Anectus vestitus, Horn, loc. cit. p. 399’. 
Hab. Honpvuras 1, 
OXINTHAS. 
Mentum broad, trapeziform, emarginate in front; gula with a distinct medial fissure; ligula not very promi- 
nent, emarginate in front; the base of the maxille exposed; maxillary palpi slightly dilated, last joint 
oval; labrum prominent, emarginate in front; antenne rather thin, widening outwardly; head rather 
broad, sunk into the prothorax nearly to the eyes; epistoma emarginate in front; prothorax feebly 
bisinuate at the base, the hind angles not prolonged, closely embracing and as wide as the elytra, without 
distinct lateral margins; scutellum small; epipleure narrow, suddenly dilated at the base; intermediate 
coxe with distinct trochantin, side-pieces reaching the cavities; prosternum horizontal, a little produced, 
and the apex rounded; mesosternum slightly concave in front; intercoxal process of abdomen broad, 
rounded in front; tibial spurs rather short and stout; anterior tibie slightly curved, outer apical angle 
rounded; tarsi stout, spinous beneath; first joint of hind tarsi short; body oval, convex, somewhat 
parallel ; ventral segments without coriaceous hind margin. 
This genus, difficult to locate satisfactorily, is, I think, best placed near Branchus 
and Nyctelia; the convex, somewhat parallel, form is suggestive of certain species of 
the South-American genus Praocis (Anthrasomus); but in structure it more nearly. 
approaches the former. The short basal joint of the posterior tarsi, the epipleure 
dilated at the base, the less prominent ligula, &c. will separate it from the genera of 
the group Coniontides ; the larger mentum and corneous hind margin to the ventral 
segments, from the succeeding groups. 
1. Oxinthas praocioides. (Tab. III. fig. 23, 9 .) 
Oval, convex, somewhat parallel, black, shining. Head with scattered coarsish punctures, the epistoma with 
a broad shallow impression; thorax a little broader than long, about as wide as the elytra, the sides 
rounded and slightly sinuous before the base, the hind angles subrectangular, anterior angles not very 
prominent and obtuse, with scattered fine punctures; elytra about twice the length of the thorax C2); 
less than twice as long ( ¢'), scarcely wider than the thorax, the humeri slightly swollen and prominent, 
with coarse scattered punctures (much coarser than those of the thorax), the suture with some finer 
punctures more numerous and distinct towards the apex. Beneath with coarse scattered impressions ; 
