BIOLOGIA CENTRALI-AMERICANA. 
ZOOLOGIA., 
Class INSECTA. 
Order COLEOPTERA. 
Tribe HETEROMERA. 
Fam. TENEBRIONIDA. 
Subfam. TENTY RIIN A. 
Under this subfamily are included those species in which the ventral segments are 
entirely corneous (without a coriaceous hind margin to the third and fourth), and the 
intermediate coxee without trochantin. ‘The coriaceous hind margin to the third and 
fourth ventral segments, though apparently of trivial importance, appears to be a good 
character, and the different groups may be readily separated by it. The arrangement 
is the same as that used by Leconte and Horn for the North-American species. 
Group TENTYRIIDES. 
This group will include Leconte and Horn’s tribes Gnathosiini and Thinobatini, the 
former represented in our country by Zriorophus and Trientoma, the latter by Lury- 
metopon and Emmenastus; and some genera of doubtful position, one or two of which 
will not fall satisfactorily into any of the groups, tribes, or subfamilies proposed by 
Lacordaire, Leconte, or Horn. 
The Tentyriides are very poorly represented in Central America, the winged species 
of Emmenastus alone being at all numerous. 
TRIOROPHUS. 
Triorophus, Leconte, Ann. Lyc. New York, v. p. 141 (1852) ; Lacord. Gen. Col. v. p. 34 (1859) ; 
Horn, Revis. Ten. N. A. p. 258 (1870); Lec. & Horn, Class. Col. N. A. p. 362 (1883). 
Four species from the Southern States of North America (from Arizona, Texas, 
BIOL, CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, July 1884. BB 
