526 Cc. H. RICHARDSON 
segments are fused and broadly rounded, the caudal segment 
being slightly indented at the tip. The head is small and the 
mouth parts appear as fleshy lobes. The integument is smooth 
and delicate. In the third larval stage the anterior end is much 
more pointed, the mouth parts, though not prominent, are repre- 
sented by folds with chitincus plates. The integument is thick 
and chitinous, is thrown into large folds laterally and is every- 
where roughened by fine granulations. 
Aphidius rosae Hal. (?) has a somewhat simpler first stage 
larva than the preceding species. The head segment is quite 
large and bears a pair of long, curved mandibles. The last 
abdominal segment terminates in a single long, curved, bluntly- 
pointed process. The body is smooth and free from bristles. 
The second and third stage larvae are not distinguishable from 
those of Praon simulans Prov. except that the latter stage of A. 
rosae has a more pointed head. 
Howard and Fiske (11) have: figured what is probably the 
first stage larva of the Braconid, Meteorus versicolor (Wesm.). 
It resembles that of Limnerium validum (Cress.) in the posses- 
sion of a large, heavily chitinized head and an elongate caudal 
appendage. Judging from the figure, the mandibles are larger 
than those of Limnerium and are, according to the authors, like 
those of certain Platygasteridae. This species is in America a 
parasite of the brown-tail caterpillar (Euproctis chrysorrhaea). 
Smith (12) has described the remarkable larval stages of the 
Chaleidoid Perilampus hyalinus Say which is parasitic upon a 
number of other hymenopterous parasites and the Tachinid, 
Varichaeta aldrichi Townsend. The first or planidium larva is 
0.3 mm. in length and about 0.06 mm. in greatest width. There 
are thirteen distinct body segments which are heavily chitinized 
and dark brown in color. The mandibles are well developed, 
hooked and crossed at the tips. The head bears a pair of stout 
antennal processes and back of these two stout spines. The ven- 
trum is armed with spiny processes on each side, with larger 
single spines medially. These are probably ambulatory in func- 
tion. The anal segment terminates in two long cerci. On the 
dorsum are a few scattered spines. The planidium is a free 
