4 PHYTOPHAGA.—SUPPLEMENT. 
At first sight this species seems to be but a variety of A. melanocera, to which indeed 
it bears a great resemblance. A. héger differs, however, in the following manner: the 
shape is much more elongate and narrow, the thorax is distinctly less transverse, 
especially in the male, and the elytra are less shining and almost imperceptibly 
punctured. The elytra in the female of A. melanocera are, moreover, devoid of the 
lateral costa, and have only the shoulders acutely raised. Of both species I have the 
two sexes before me and they can be at once distinguished. The male of A. melanocera 
is shorter and of more widened shape than that of A. hége?, and has the elytra much 
more shining and distinctly punctured and the thorax more transverse. In the male 
of A. hégei a curious whitish bloom is to be seen on the elytra (when held sideways), 
which is entirely absent in the allied form. About fifty specimens have been 
received. 
An example from Tehuantepec is figured. 
6. Aulacoscelis variabilis. (Tab. XXXV. figg. 8, 9.) 
Black ; thorax fulvous, closely punctured; elytra very finely punctured, black, the lateral margins narrowly 
fulvous. 
Var, Entirely black. 
Length 3-4 lines. 
Head piceous or obscure fulvous, distinctly and rather closely punctured at the sides; antenne black, the 
joints short and subtriangular; thorax not or scarcely broader than long, the sides nearly straight, 
slightly narrowed at the base, the latter with a distinct short longitudinal groove on each side, the 
surface rather closely punctured, opaque; elytra very minutely punctured, of an opaque greenish-black 
tint, the base and the margins generally furnished with very short silvery-greyish pubescence, the extreme 
lateral margins and the epipleuree fulvous; legs and underside black. 
Hab. Mxxico, Pachuca in Hidalgo (Hége), Real del Monte (Flohr). 
A. variabilis may be readily known by the closely punctured head and thorax; its 
general coloration, although variable, is constant in the black ground-colour of the 
elytra. Herr Hoge obtained more than a hundred specimens at Pachuca, amongst 
which those with a fulvous thorax predominate ; the elytra in the black specimens are 
devoid of the fulvous margin and epipleure, and do not seem to differ much according 
to sex—a slight depression within the shoulder in the female being the only indication. 
The antenne in the male are, however, rather longer than in the female. We figure 
both forms. 
7. Aulacoscelis fulvipes. 
Black or fuscous, pubescent; thorax finely punctured; elytra closely covered with greyish pubescence ; legs 
fulvous. 
Length 3 lines. 
Entirely black or piceous, the head and thorax finely punctured, clothed with rather long greyish pubescence ; 
the thoracic basilar groove somewhat indistinct ; elytra closely pubescent, the punctuation not visible - 
legs entirely fulvous, the tarsi darker. . , 
Hab. Mexico, Guanajuato (Sailé). 
