566 Mr. D. Sharp and Mr. F. Muir on the Comparative 
emarginate at tip, on the ventral aspect the ring-piece projects as a 
long strut (b), Sac large, with a slender flagellum (fg) rising from 
the apex. 
The basal part of the median lobe being divided into 
two pieces, and the complete ring-piece with a cap on the 
dorsal side separate this genus from the Chrysomelinae. 
C. tenebricosa is of the same type, but the cap-piece is 
smaller in proportion. Hence we propose Timarchinae 
as a distinct subfamily. As Donaciinae and Sagrinae 
approximate this structure, the Timarchinae should be 
placed between them and Chrysomelinae. 
DMabrotica soror. 
In this Galerucid the median lobe forms a long, curved tube: 
the basal foramen extends ventrally for one-third of the length 
of the tube: at the distal extremity there is a short acumen, 
and the dorsal face of the tube is membranous for nearly one- 
third of the length. The tegmen consists of a pair of slender, 
nearly parallel and nearly contiguous rods, these diverge very 
abruptly, and then converge again a little so as to partially embrace 
the median lobe, but they are unconnected by chitin on the dorsal 
aspect. 
Galerucella spp. 
Agree with the above in respect of the tegmen; but the basal 
part of the median lobe is very different, the tube being more 
complete at the base, and provided there with a pair of hooks. 
These hooks also exist in Galeruca tanaceti and in Lochmaea. In 
the last-mentioned genus the median lobe is of highly irregular 
form, and instead of forming a single curve, the two extremities of 
the organ are curved in opposite directions (as occurs less markedly 
in Haltica). 
So far as we can form an opinion as to the Galerucinae 
from the few forms examined, it would appear that their 
chief characteristics are (1) the indefinite delimitation of 
the median orifice, entirely dorsally placed and unpro- 
tected; and (2) the small tegmen, forming only delicate 
rods. 
Faltica corylt. 
Median lobe straight, tubular, somewhat flattened, ventral edge 
of median orifice produced into a point, projecting beyond the 
