Phyllotreta. | PHYTOPHAGA. 
1, Antenne unicolorous black. 
A. Upper surface blue or greenish-blue, 
closely and very finely punctured . 
B. Upper surface black with bluish or greenish 
reflection, very closely but distinctly and 
comparatively strongly punctured . 
2. Antenne with the basal joints more or less 
distinctly reddish or ferruginous. 
A. Elytra very finely, closely, and confusedly 
punctured. . 
B. Elytra comparatively strongly punctured, 
the punctures being arranged in more or 
less distinct rows. 
a. Upper surface deep black, without 
metallic reflection ; thorax evidently more 
finely punctured than elytra. . 
b. Upper surface with metallic reflection ; 
thorax nearly as strongly punctured as 
GLY Ear. IS Lee Oi Kemer e cts 
II. Upper surface black with yellow bands or patches 
on the elytra. 
i, Outer margin of yellow bands on elytra feebly or 
moderately emarginate. 
1. Upper surface depressed ; thorax witha more 
or less distinct metallic reflection, which is some- 
times marked and sometimes very faint. 
A. Size smaller; yellow bands on elytra 
rather strongly curved inwards at base . . 
B. Size larger ; yellow bands on elytra scarcely, 
or very gradually, curved inwards at base. 
a. Tibiz red-yellow at base only . 
b. Tibiz entirely red-yellow : 
2. Upper surface convex; thorax black, without 
metallic reflection . 
. Outer margin of yellow bands on elytra very 
strongly emarginate. 
1. Legs, except posterior femora, reddish-yellow 
2. Legs mostly black. 
A. Dark space between the yellow bands of 
elytra rectangular . 
B. Dark space between the yellow bands of 
elytra elongate-oval 
i. Elytra with two yellow spots | on each, rarely 
united by a narrow line; form short oval and 
COMOSH SWORE vy co Moe 6 6.50 somo. DY C 
P. nodicornis, Marsh. (antennata, Koch). Oblong 
P. NIGRIPEs, F, 
(lepidii, Koch.) 
P. CONSOBRINA, Curt. 
(melena, 111.) 
P. punctuLata, Marsh. 
P. arra, F. 
P. CRUCIFER®, (oeze. 
(peectloceras, Com.) 
P, virtuna, Redé. 
. UNDULATA, Kuts. 
. NEMORUM, L. 
lachla| 
P. FLexvosa, Jil. 
P. OCHRIPES, Curt. 
P. stnuatTa, Steph. 
P. TETRASTIGMA, Com. 
P. EXCLAMATIONIS, Thunb. 
(brassicae, F.) 
g, depressed, 
geneous or coppery, rarely with a greenish reflection; head with the 
vertex very finely punctured, almost smooth, antennee long and moderately 
stout, black with the apex of the basal joints ferruginous : thorax 
transverse, but not strongly so, gradually rounded at the sides, very 
closely and rather distinctly punctured ; elytra long, subparallel, sepa- 
