8 | PHYTOPHAGA.—SUPPLEMENT. 
1. Hemonia nigricornis. (Tab. XXXV. fig. 12.) 
Hemonia nigricornis, Kirby, Faun. Bor.-Amer. iv. p. 222°. 
Hemonia americana, Guér.-Ménev. Icon. Régne Anim., Ins. p. 259°; Lac. Monogr. in Mém. Soc. 
Liége, iii. p. 210°. 
Hemonia melsheimeri, Lac. loc. cit. p. 211*. 
Hemonia flohri, Jac. Stett. ent. Zeit. 1884, p. 126°. 
Hab. Norra America? 3, Canada}, United States 4—-Mexico °, near the city (Hége), 
Ixtacalco (Flohr). 
The insect described by me as H. flohri, upon comparison with a North-American 
example of H. nigricornis, kindly communicated by Dr. Horn, proves to be conspecific 
with that species, the black head and underside not being a constant character. 
Amongst the 200 examples obtained by Herr Hoge there are several nearly black- 
coloured specimens ; the legs, however, always remain fulvous. 
LEMA (p. 2). 
During the eight years this work has been in progress, a great many more species, 
the majority of which are apparently undescribed, have been obtained from our region. 
Many of the species are very closely allied and difficult to separate and require long 
series from the same localities before their differences can be thoroughly understood ; 
it is therefore quite possible that some of those described as new in this work, as well 
as others included in Lacordaire’s monograph, will eventually be regarded as varieties 
only, many having been founded on single specimens. In a monographic or faunistic. 
work it is frequently necessary to describe from single examples, or three fourths of the 
species would have to remain unnamed; for the monographer there is no choice but 
to point out differences which he considers specific and which in so many closely allied 
forms as in Lema must often of necessity be minute. 
Lema bituberculata (p. 2). 
To the Mexican locality given, add:—La Parada (Sallé), Amecameca in Morelos. 
(Hoge). 
I refer two specimens from the above localities to this species, with the description. 
of which they agree in the main points. In both examples the two red frontal. 
tubercles are present, although they are not equally well marked; the thorax in one 
specimen is scarcely punctured and the elytral punctuation is also less deeply impressed, 
but this may be a sexual difference; the antenne are rather short and robust (as given 
by Clark); and the ninth row of elytral punctures is interrupted, though Clark Says. 
nothing about this and places the species after L. nigrita. In this last-named insect, 
however, as well as in all others belonging to the same group, the ninth row of punc-. 
tures is entire, and L. bituberculata must therefore find its place in Lacordaire’s second 
division. 
