APHTHONA.—PHYLLOTRETA. 297 
the shoulders prominent, the punctuation arranged in closely approached rows, distinct nearly to the apex ; 
legs piceous, the tarsi fulvous. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
The prosternum in this species is narrowed between the coxe and (like the abdomen) 
impunctate. The general shape is very convex. 
21. Aphthona (?) crassicornis. 
Below blackish, above metallic dark greenish, the basal joints of the antenne and the legs dark fulvous; thorax 
strongly and remotely, the elytra deeply, more closely and semi-regularly, punctured. 
Length 1 line. 
Rather elongate, slightly narrowed posteriorly, of a very dark greenish metallic colour; the head broad, 
impunctate, the frontal tubercles small and obsolete, the labrum fulvous; the palpi rather robust, fulvous ; 
antenne only extending to about the basal third of the elytra, robust, the basal six joints fulvous, the rest 
black, the terminal four joints much thickened; thorax one half broader than long, the sides straight at 
the base, rounded at the middle, the anterior angles oblique, the surface convex, strongly and remotely 
punctured ; elytra with an obsolete depression below the base, more closely punctured than the thorax, 
the punctures strong and arranged in irregular rows, but greatly diminishing towards the apex; legs dark 
fulvous; the first joint of the posterior tarsi as long as the following three joints united; prosternum 
rather broad, somewhat rugose. 
Hab. Panama, Volcan de Chiriqui (Champion). 
This species has a broad prosternum and short, robust antenne. It is, perhaps, 
generically distinct from Aphthona. 
PHYLLOTRETA (p. 368). 
Phyllotreta mexicana (p. 371). 
To the locality given, add :—GuatEMaLa, Sinanja (Champion). 
Phylotreta crotchi (p. 372). 
To the locality given, add :—Mexico, near the city (H. H. Smith). 
The description of this species was taken from female specimens. A male has lately 
been obtained by Mr. Smith; it has the fifth joint of the antenne much longer than the 
others, curved, and dilated, and the sixth joint very short. P. crotchi may be known 
from P. robusta, Lec., by the yellow vitta of the elytra not extending to the lateral and 
sutural margins at the apex. 
9. Phyllotreta lativitta. 
Greenish-black; the terminal joints of the antenne gradually thickened ; thorax closely punctured; elytra 
yellow, closely punctured, the sutural and lateral margins g greenish, 
g. Antenne with the apex of the first joint, and the second entirely, fulvous; the fourth joint triangularly 
widened. 
Length 1 line. 
Similar in shape to P. vittata, Fabr.; the head finely and sparingly punctured; the antenney with the fifth 
joint distinctly longer than either the fourth or sixth ; thorax about one half broader than long, the sides 
BIOL. CENTR.-AMER., Coleopt., Vol. VI. Pt. 1, Suppl., December 1891. 2q 
