212 PHYTOPHAGA.—SUPPLEMENT. 
the comparatively narrow thorax, and the colour of the elytra separate L. apicicornis 
from its congeners. . 
15. Euphrytus (?) rugosus. (Tab. XL. fig. 17.) 
Elongate, subdepressed, obscure seneous; the head, thorax, and legs rufous; elytra greenish-eneous, closely 
punctured and finely transversely rugose; tarsi black. 
Length 3 lines. 
Head closely rugose-punctate, rufous; the clypeus transverse, separated from the face by a transverse groove, 
rugosely punctured; the labrum with a large black patch; mandibles and palpi black; antenne (9 ) 
scarcely extending to the middle of the elytra, black, pubescent, the basal joints fulvous at the apex, the 
seventh and following joints gradually thickened; thorax transverse, twice as broad as long, the sides 
strongly rounded, the anterior angles obtuse, the surface finely and very closely semirugose punctate, 
rufous; scutellum black ; elytra obscure greenish-ceneous, more strongly punctured than the thorax, the 
interstices transversely rugose or wrinkled throughout, with traces of longitudinal narrow lines on the 
disc and near the apex; legs rufous, the tarsi black; the first joint of the posterior tarsi as long as the 
following two joints together ; prosternum rather broad, widened and truncate posteriorly. 
Hab. Mextco, Yolos (Salié). 
A single specimen, apparently a female. This insect is provisionally included in 
Euphrytus, from the typical forms of which it differs in the broader prosternum and in | 
the shorter metatarsus of the posterior legs. E. rugosus may be easily recognized by 
its coloration and sculpture. 
THERSES. (To follow the genus Euphrytus, p. 126.) 
Body oblong ; antennz subfiliform, the terminal joints thickened ; thorax transverse, strongly narrowed in 
front ; elytra semipunctate-striate ; legs rather slender; femora unarmed ; tibiee channelled; claws bifid ; 
prosternum narrowly elongate; the anterior margin of the prothoracic episterna concave. 
This new genus may be at once distinguished from all others of the Iphimeine by 
the bifid claws. The two species referred to it, both of which are from Mexico, have 
somewhat the general appearance of certain members of the family Erotylide; they 
differ from Euphrytus and the allied genera in the shape of the thorax, as well as by 
the form of the claws. | 
1. Therses nigricollis. 
Body narrowed posteriorly, black; head and thorax opaque, impunctate; elytra metallic greenish, finely 
geminate-punctate-striate, the interstices more or less longitudinally convex. 
Length 2 lines. 
Head impunctate ; the eyes widely separated, slightly sinuate at their inner margin ; the antenne extending 
to the middle of the body, black, the lower three joints fulvous at the apex, the third joint distinctly 
longer than the second but shorter than the fourth, the apical joints shorter and stouter ; thorax rounded - 
at the sides and strongly narrowed in front, the anterior angles not produced, the surface opaque, black, 
impunctate (under a very strong lens, some minute punctures are visible); scutellum black ; elytra nar- 
rowed and pointed towards the apex, metallic greenish, geminate-punctate-striate, the punctures towards 
the apex arranged singly, the interstices (especially towards the sides) longitudinally convex ; underside 
and legs black, the knees piceous, the first joint of the posterior tarsi as long as the following two joints 
together, 
