334 PHYTOPHAGA, [ /Taltice. 
a®, Spur of hind tibiz inserted in middle 
of apical edge; pygidium often bare 
or slightly exposed, without a central 
chanel hp! ages eye) eee Me 
b*. Spur of hind tibize inserted at the 
outer side of apical edge; pygidium 
covered, with a double central chan- 
nel for the reception of the apical 
sutural angles of the elytra. 
b. Elytra with strong and regular rows of 
punctures, which are continued toapex . Barornita, Foudr. 
B. Form subglobose, almost hemispherical, very 
convex; pygidium with a central channel. 
a, Antenne gradually thickened towards apex. 
a*, Mouth parts covered, or nearly 
covered, by prosternum; elytra con- 
fusedly punctured; colour testaceous, 
not metallic . . . . . =. . +. . SPHERODERMA, Steph. 
b*. Mouth parts free, not covered by the 
prosternum; elytra with rows of 
punctures; colour metallic . . . . 
b. Antenne with the last three joints larger, 
forming a somewhat indistinct club. . . 
II. Anterior coxal cavities closed behind; elytra, with 
few exceptions, punctured in rows. (Sub-tribe 
Plectroscelides, Thoms. ) 
i. Antenre 11-jointed; posterior tarsi inserted at the 
apex of the tibiz. 
1. Intermediate and posterior tibiz simple, without 
a tooth on their outer side. 
A. Thorax without a transverse impression before 
base. 
a. Thorax with an oblique longitudinal im- 
pression or fold on each side of base. 
a*, Longitudinal impressions at base of 
thorax obsolete; elytra in proportion 
shorter and broader, confusedly punc- 
tured except sometimes in front; 
thorax in our species bright red, not 
metallic . oe Se i es vie 
b*. Longitudinal impressions at base of 
thorax very distinct; elytra in pro- 
portion more elongate and narrower, 
punctured in strong and distinct 
rows; thorax metallic, unicolorous 
vrakdy knee! 5 Goo as SE 
b. Thorax without longitudinal impressions 
AbIDASe) ; OP cies uc ce cues Gee op es a) WOOMROSIO, Houde: 
B. Thorax with a transverse impression before 
base, which is sometimes very plain, and some- 
times more or less obsolete. 
a. Transverse impression at base of thorax, 
as a rule, strong and distinct ;* cox only 
slightly distant . . . . . + + « « CREPIDODERA, Chevr 
PayLuorTreta, Foudr. 
APTEROPEDA, Redt. 
Mniopnita, Steph. 
PopaGrica, Foudr. 
Manrtoura, Steph. 
* In C. ventralis the transverse impression is often very obsolete; Weise classes 
this species with Ochrosis on the formation of the frontal tubercles, and it strongly 
resembles O, salicaria in general appearance; the oblique impressions, however, at 
