2 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
Nine genera and 111 species have been previously described in 
these groups from Mexico and Central America, and the number is 
increased to 10 genera and 153 species in the present paper. 
The writer will be glad to identify material in these groups at any 
time. 
Tribe AGRILINI. 
Group TRACHYTES Lacerdaire. 
Trachydes LAcorDAIRE, Gen. Col., vol. 4, 1857, p. 86. 
This group of the tribe Agrilini, besides the genera given in the 
following key, also includes the following genera: Cylindromorphoides 
Kerremans, Anthazomorphus H. Deyrolle, Germarica Blackburn, 
Aphamsticus Latreille, Hndelus H. Deyrolle, Paratrachys Saunders, 
Stenianthe Fairmaire, Pseudianthe Fairmaire, Sponsorinus Fairmaire, 
and Janthe Marseul, none of which are found in the Western Hemis- 
phere except the genus Cylindromorphoides, which was erected for a 
slender species from Brazil. The species of this group are distinct 
from all the other Agrilim in having the median coxae more widely 
separated than the anterior ones, anterior margin of the posterior 
coxae only slightly concave, and the tarsi very short. 
Tn this group the body is usually broad and ovate, sometimes, how- 
ever, elongate and slender; in both cases they are usually narrowed 
behind. The front of head is strongly narrowed by the insertion of the 
antennae, which have the poriferous fossae terminal; antennal cavities 
large and situated a certain distance from the eyes; base of pronotum 
sinuate at the sides, with a median lobe; scutellum triangular and 
sometimes very small; prosternum very variable in form; sternal 
cavity for the insertion of the prosternal process formed entirely in 
the metasternum, the mesosternum being widely divided; middle 
coxae more widely separated than the anterior ones; hind coxal plate 
but slightly dilated internally, narrowest at the middle, and broader 
externally, with the anterior margin only slightly concave; tarsi 
very short; tarsal claws toothed or appendiculate. 
The larvae, so far as known, are miners in the leaves of various 
plants, although very little is know about the biology of the species 
found in the tropical parts of the world. The adults are found feed- 
ing on the leaves of a great variety of plants, and are quite active 
during the warmer part of the day. 
KEY TO THE GENERA. 
1. Antennae lodged in a distinct deep groove in the prosternum...... ....-..--- 2 
Antennae free in repose, not lodged in a groove in the prosternum. 
Trachys Fabricius. 
2: uegsilodeedsin depressions, beneath. 5.02... .eeee a. 2 | 5 eg ee es lees 
Lega grespa. .28 OV. aus vemos add. 2 o8e Bee castors RRRe. oO... 70 
