Girault, the Chalcid Genus Hypopteromalus. 
37 
depression. Thorax finely and densely punctured; legs 
yellowish white; tips o£ tarsi dusky; wings hyaline; sub¬ 
costal nervure brown and prolonged on the costa to the 
extreme tip of the wing. Abdomen black, glabrous, 
polished, flat above, convex beneath, so as in those indi¬ 
viduals with acuminate anus—which I take to be females, 
but which Wilkinson takes to be males—to appear almost 
triangular when viewed in profile. 
Bred five specimens from a mass of the army 
worm cocoons for some unknown Ichneumon I have 
not met with in Rock Island county. Four of the five 
have the antennae still covered with the transparent 
pupal membrane which we often find on the antennae 
of immature Cerambycids, but the structure of the 
apical joints of the antennae is distinctly visible in 
these.” (Walsh, 1861, p. 370). 
The figure referred to in the original description is crude and 
misleading rather than helpful, as erroneous and poorly executed 
figures always are. Walsh gives nothing more in regard to the 
species excepting a brief paragraph on page 364 referring to the 
figure and a remark concerning the status of the species as a para¬ 
site of the “ichneumon,” which Riley (1881) afterwards stated 
to be Apantelesi militaris (Walsh). The spelling of the specific 
name is evidently due to an error, corrected later by Walsh (1865) 
himself and others and therefore unnecessarily so by de Dalla 
Torre (1898). 
About four years later Asa Fitch (1865), treating of the para¬ 
sites of the Northern Tobacco Worm (Phlegethontius quinque- 
maculata Haworth), gave a somewhat running and lengthy 
account of this hyperparasite and redescribed it as new under the 
name of Pteromalus tabacum ; Fitch also gave a brief description 
of the male, described for the first time. 
In order to bring all the literature of this genus together in 
this connection, as well as for a matter of interest I herewith 
quote Fitch’s description given on pages 225-227: 
“These destroyers of the insect which destroys the 
tobacco worm are very small four-winged flies of a 
shining dark-green color, with pale yellowish legs and 
white feet. They belong to the order of Hymenoptera 
and the family Chalcididce, and are closely related to 
