154 HETEROMERA. 
Many examples. Narrower, smaller, and more convex than U. mexicana; the thorax 
more finely and more sparingly punctured, the epistoma similarly excavate in both 
sexes. From U. fossulata, male, it may be known by its broader, smoother, and more 
convex thorax, the punctuation of which is finer and closer in both sexes; the antenne 
stouter, the penultimate joints more transverse. 
A single immature male example contained in Mr. F. “Bates’s collection has the 
antenne still stouter, the penultimate joints even more strongly transverse ; it is doubt- 
fully distinct from U. levicollis. 
4. Uloma retusa. 
Tenebrio retusus, Fabr. Syst. Eleuth. 1. p. 149. 
Uloma retusa, Casteln. Hist. Nat. ii. p. 220°. 
Var. dimidiata. (Tab. VII. fig. 15, 3.) 
Tenebrio retusus, var., Fabr. loc. cit. 
Uloma dimidiata, Dej. Cat. 3rd edit. p. 221%. 
Reddish ferruginous, the elytra black to a little beyond the middle. 
Hab. Muxico, Toxpam, Cordova (Sallé); British Honpuras, Rio Sarstoon, Rio 
Hondo, Belize (Blancaneaua) ; Nicanacua, Chontales (Belt, Janson); Panama (coll. F. 
Bates), Bugaba (Champion).— Cotompia; Gurana, Cayenne??; Brazin'; PERu ; 
ANTILLES 1. 
Many examples. I am unable to find any satisfactory difference, except colour, 
between our Central American specimens and the South American U. retusa, Fabr. 
Both forms occur in Brazil and Guiana; in all the examples I have seen from Colombia 
and Central America the elytra have only about the basal half black. 
U. retusa may be known by its convex form, coarsely punctured thorax, coarsely and 
deeply punctate striate elytra, and peculiar coloration; the head, thorax, legs, and 
epipleure are formed much as in U. fossulata. 
A male example from Chontales is figured. 
** Thorax similar (the disc without anterior excavation in the male) in both sexes. 
| a. Anterior tibia with a sharp triangular tooth in the male. 
5. Uloma armata. (Tab. VII. fig. 16, ¢ .) 
Elongate ovate, subparallel, dark reddish brown or black, shining. Head closely and rather finely punctured ; 
the epistoma similarly and feebly excavate transversely in both sexes; prothorax transverse, widest a 
little before the base in the male, at the base in the female, the angles very obtuse (almost rounded), 
the base bisinuate and distinctly margined, closely and somewhat coarsely punctured, the disc with 
a shallow sinuous transverse impression (limited on each side by a shallow oblique fovea) just before the 
base, and similar (without anterior excavation in the male) in both sexes; elytra comparatively elongate, 
subparallel, the base emarginate, the humeral angles prominent, deeply punctate-striate, the interstices 
almost smooth ; tibia rather long (longer than in U. meavicana and allies), the inner edge of the anterior 
pair in the male with a sharp triangular tooth (placed a little before the middle, and concave beneath) and 
lined with coarse spiny fulvous hairs from the middle to the apex ; intermediate tibie: almost smooth on 
