296 PHYTOPHAGA.—SUPPLEMENT. 
A single specimen. A. smithi is well distinguished by its metallic zeneous colour and 
the strong and regularly punctured striz of the elytra. 
17(a). Aphthona purpurea. 
Dark purplish, above metallic purplish, the antenne black; thorax transverse, closely punctured; elytra 
moderately strongly punctate-striate; legs fulvous. 
Length 1} line. 
Oblong-ovate, convex; the head metallic blue or purplish, with a few punctures, the frontal elevations trans- 
verse, distinct, the clypeus margined with flavous, the labrum piceous ; antenne rather robust, black, the 
apex of the basal joint, and the second joint entirely, flavous, the third joint very little shorter than the 
fourth, this and the following joints widened at the apex, the last two joints slender and cylindrical ; 
thorax twice as broad as long, the sides rounded and narrowly margined, the surface of a metallic blue 
colour, strongly and remotely punctured, with an obsolete transverse depression near the base; scutellum 
black ; elytra with a basal depression, purplish, regularly and rather strongly punctate-striate; underside 
obscure dark bluish or purplish ; legs flavous, the posterior femora obscure purplish. 
Hab. Panama, Bugaba in Chiriqui (Champion). 
One specimen. Somewhat allied in shape and punctuation to A. robusta, Jac., but 
differing in the metallic purplish colour and the strongly punctured thorax. 
18 (a). Aphthona amulensis. 
Narrow, subparallel, black ; the basal joints of the antenne and the anterior tibia, more or less, flavous; thorax 
transverse, bluish-black, impunctate; elytra very finely and obsoletely punctured, bluish-black. 
Length 1 line. 
Head broad, bluish-black, entirely impunctate, the frontal tubercles and carina obsolete; antenne rather robust, 
more than half the length of the body, the lower five joints flavous, the others black, the second joint 
stout, short, the following two joints more slender, but not longer than the second ; thorax twice as broad 
as long, the sides rounded at the middle, the angles blunt, not produced, the surface smooth, impunctate, 
pluish-black, the base with a slight transverse depression at the sides only; elytra of the same colour 
as the thorax, exceedingly minutely punctured; underside black; the tibiee more or less, the tarsi 
entirely, fulvous; prosternum very narrow; the first joint of the posterior tarsi as long as the following 
three joints united. 
Hab. Mexico, Amula in Guerrero (H. H. Smith). 
The transverse, impunctate thorax and the minutely punctured elytra in connection 
with the system of coloration principally distinguish A. amulensis from its congeners. 
It is also of much more elongate parallel shape than is usual in this genus. 
20. Aphthona fulvitarsis. | 
Oblong, very convex, black, the basal joints of the antennve (the first excepted) and the tarsi fulvous; thorax 
transverse, strongly and remotely punctured ; elytra strongly and closely punctate-striate. 
Length ?-1 line. . 
Head impunctate at the vertex, shining, the frontal tubercles strongly raised and rather broad, dark fulvous 
or piceous, the labrum included ; antennee scarcely half the length of the body, the first joint (its apex 
excepted), and the last six also, black, the other joints fulvous, the first and second joints very robust. the 
following three equal, short, the terminal joints gradually widened ; thorax twice as broad as long, the 
sides perfectly straight, the anterior angles very oblique, thickened, and forming a sharp tooth, the surface 
convex, very strongly and remotely punctured, the posterior margin slightly rounded ; elytra very convex, 
