CHALCOPHANA.—THOOTES. 231 
22. Chalcophana dimidiaticornis. 
Pale fulvous ; antennew with the seventh joint fuscous ; thorax sparingly punctured ; elytra deeply semigeminate- 
punctate-striate, the interstices slightly convex, a transverse band at the base and a rounded spot below 
the middle metallic green. 
Var, Elytra metallic green, the posterior portion of the suture and the apex fulvous. 
Length 24-32 lines. 
d. Head rather closely and distinctly punctured ; the clypeus separated from the face by distinct grooves ; 
antenne nearly as long as the body, fulvous, the seventh joint (and sometimes the eighth also) obscure 
fuscous; thorax transverse, the sides straight at the base but rounded from the middle to the apex, the 
anterior angles mucronate, the surface sparingly punctured ; elytra deeply punctured, the punctures mostly 
arranged in single rows but here and there geminate, the interstices somewhat swollen, costate at the 
apex and at the sides, the metallic-green basal band strongly oblique or rounded on its hinder edge, the 
posterior spot not extending to either margin; underside and legs entirely fulvous. 
Hab. Mexico, Tapachula in Chiapas (Hége). 
Similar in coloration and pattern to C. ancora &c., but differing from these in the 
coloration of the antenne. The elytra are coarsely and more sparsely punctured than 
in C. ancora, with the interstices more or less swollen; in the female (which is much 
larger than the same sex of C. ancora) the interstices are strongly costate at the sides, 
and the punctures are also more distinctly geminate. In one specimen the fifth to the 
eighth joints of the antenne are fuscous; in the variety the metallic-green band is 
united with the posterior spot on the disc. 
XANTHONIA (p. 164). 
Xanthonia marmorata (p. 165). 
'To the localities given, add :—Mexico, Ventanas in Durango, Zacualtipan in Hidalgo 
(Hoge), Amula and Chilpancingo in Guerrero (H. H. Smith); Panama, Pefia Blanca 
(Champion). 
The specimens lately obtained at the above localities vary considerably in the extent 
of their markings and also in size and sculpture: in some examples the elytral punc- 
tuation is irregular, in others it is arranged in rows and the interstices are finely 
costate, this latter peculiarity being probably sexual. Of the light fulvous variety 
many additional specimens have also been received. It is not impossible that 
X. marmorata may ultimately prove to be a variety of X. decemnotata (Say) or of some 
other described species. In a few specimens from Chilpancingo the elytral spots form 
irregular patches. 
THOOTES. (‘To follow the genus Xanthonia, p. 166.) 
’ Body oblong-ovate, glabrous; eyes entire; antenne gradually thickened ; thorax transverse, flattened on the 
disc, with a distinct lateral margin; elytra punctured in rows; legs slender, the femora unarmed; the 
first joint of the posterior tarsi as long as the following two joints united; claws appendiculate ; pro- 
sternum strongly narrowed between the coxe, its base truncate; the anterior margin of the prothoracic 
episterna concave. 
