33 
specimens of the bagworm were noticed in the vicinity. That this 
species should be attracted to the Piinpla only when contained within 
the bags of the bagworm would be somewhat of an anomaly. 
Pezomachus insolitus n. sp. 1 
The species of the genus Pezomachus may or may not be hyper- 
parasites. The genus somewhat resembles Hemiteles, and there have 
been published statements to the effect that the two genera are identical, 
the one comprising the one sex and the other the other sex. These 
statements, however, are due to a faulty appreciation of the generic 
characters and to the fact that species of each genus are often reared 
from the same host, notably from the egg cocoons of spiders. So close 
an observer as Foerster, as a matter of fact, placed the two genera in 
Fio. 16. — Spilochalcis debilis : a, adult; 6, antenna of same; c, Meteorus cocoon, and d, Amorphota 
cocoon from which this species has issued — enlarged (original). 
different families, the one being the type of the Hemiteloidre and the 
other of the Pezomachoidse. Three male specimens of the species under 
consideration were reared November 9 and 19, 1895, from the cocoon 
mass of the Orygia. 
Spilochalcis debilis (Say). 
This beautiful little species, which is recorded by Oresson from Del- 
aware, Indiana, and Illinois, and is also known to the writer to occur in 
North Carolina and Long Island, New York, has frequently been reared 
in the course of these investigations. There can be little doubt that 
some of the species of Spilochalcis are primary parasites of Lepidoptera. 
Others are with equal certainty hyperparasites. For example, Walsh's 
Smicra albifrons, which belongs to this genus, is with little doubt a 
tertiary parasite, since it issues from a Pezomachus which is parasitic 
upon a Microgaster which destroys the army worm (larva of Leueania 
unipuncta). 
l Described in the appendix, page 54. 
11859— No. 5 3 
