166 
IOWA ACADEMY OP SCIENCES. 
Closer study of their life-history will undoubtedly furnish 
accurate characters and markings for separating the different 
stages of development. 
APHALARA EXiLis -Web. and Mohr., var. rumicis, var. nov. 
Description . — General color brown. Head uniformly light 
brown, the posterior margin obtusely angled. Eyes distinct, 
very dark brown or almost black; the part of the head on which 
they are placed is lighter colored and separated by a distinct 
suture. Front dark brown or blackish, clypeus somewhat 
lighter. The antennae reach to the base of the upper wings or 
a little beyond; the two basal segments light brown, the six 
succeeding joints somewhat lighter colored or even light yel- 
low, and the two terminal joints dark brown or black, forming 
a small compact club, the last being sometimes almost truncate; 
terminal bristles of equal length. The third joint is the longest, 
but comparatively not as long as in Aphalara polygoni. Pro- 
notum of almost equal width throughout, being slightly wider 
and convex in the middle, slightly inclined, and has two dis- 
tinct cavities on either side. Anterior half dark brown or 
almost black, being darker than the adjoining parts of the head 
or mesothorax; the posterior half lighter. In some cases there 
are only light spots on the posterior half and from some points 
of view look like a white line between it and the mesothorax. 
Dorsulum uniformly light brown, surrounding sutures black. 
Mesonotum prominent, light brown, in some cases white. In 
others it has two large dark bands on either side of median 
dark line, all separated by longitudinal bands of lighter color 
which sometimes extend forward to the dorsulum. Sometimes 
the whitish bands predominate, giving the mesonotum a more 
whitish appearance, and extending forward in the dorsulum 
almost obscure the brown color. In some the two central whit- 
ish bands of the mesonotum extend back into the scutellum and 
give it a whitish appearance, only the fine brown central part 
being maintained, the two lateral ones only slightly indicated. 
The scutellum is usually brown, sometimes light brown or 
grayish. 
The central portion of the metathorax is usually light brown; 
the lateral portions dark brown or black, bordered with a whit- 
ish line. Prosternum dark colored, mesosternum dark with 
a light border; metasternum brown; metasternal tubercles 
brown except the tips and a light spot near the base. The legs 
