106 HETEROMERA. 
Two male and two female examples. This and the preceding species’ have much 
the form of a very large Tenebrio. 
‘TAUROCERAS. 
Tauroceras, Hope, Col. Man. iii. p. 180 (1840). 
Bucerus, De}. Cat. 3rd edit. p. 225. 
A genus peculiar to the forest-region of Tropical America; some four or five species 
are known, one of which is found in our country. 
1. Tauroceras angulatum. (Tab. V. fig. 17, .) 
Tenebrio angulatus, Perty, Del. Anim. p. 57, t. 12. f. 7 (¢) (1880). 
Hab. British Honpuras, Rio Hondo (Blancaneaux) ; GuaTEMALA, Zapote, Champerico 
(Champion) ; Nicaragua, Chontales (Belt, Janson).—SovutH AMERICA, Brazil. 
This fine species is found beneath the loose bark of decaying forest-trees. 
NYCTOBATES. 
Nyctobates, Guérin-Méneville, Mag. Zool. 1834, Mélasomes, p. 33, t. 118. f. 2, a-d; Lacord. Gen. 
Col. v. p. 871 ; C. O. Waterhouse, Ann. Nat. Hist. 4th ser. xvii. p. 287 (nec Horn and Leconte). 
Mylaris, Pallas, Icon. Ins. i. p. 37, t. 110. f. 1 (desc. nulla). 
Milaris, Motsch. Bull. de Moscou, xlv. pt. 2, pp. 28, 37. 
This genus, as recognized here, will include only the Tenebrio gigas, Linn., and two 
or three allied species, all of which are peculiar to South and Central America; one of 
these, V. maaima, Germ. (grandis, Dej.), from Brazil, is sometimes labelled MW. mewi- 
canus, Guér., in collections ; it will not include the North-American species at present 
referred to it, which belong to Alobates, Motsch. (gf Motschoulsky and C. O. Water- 
house, loc. cit.). 
These insects are found in the forests beneath the loose bark of decaying or fallen 
trees; they emit a caustic foetid yellow liquid. when handled. The species of Nycto- 
bates are almost the largest known forms of Tenebrionide. 
1. Nyctobates gigas. 
Tenebrio gigas, Linn. Syst. Nat. edit. 12, i. pt. 2, Insecta, p. 674° (1767) ; Am. Acad. vi. +P. 396. 
no. 26; Fabr. Syst. Eleuth. i. p. 144 (1801). 
Mylaris gigantea, Pall. Icon. Ins. i. p. 37, t. C. f. 1 (1781). 
Tenebrio laminatus, Fabr. Mant. i. p. 211 (1787). 
Helops laminatus, Fabr. Ent. Syst. i. p. 117 (1792). 
Upis gigas, Herbst, Nat. Kaf. vii. p. 232, t. 110. f. 1 (1797). 
Nyctobates gigas, Guér. Mag. Zool. 1834, Mélasomes, p. 33, t. 118. f. 2, a—d. 
? Var. Milaris cayennensis, Motsch. Bull. de Moscou, xlv. pt. 2, p. 27 (1872). 
Hab. Mexico (coll. F. Bates); Guatemaua, Cubilguitz (Champion); Nicaraeva, 
Chontales (Janson, Belt); Panama (coll. F. Bates, ex Boucard).—CotomBia ; BRazit ; 
Perv; Gurana, Surinam, Cayenne!; Botivia. | 
