24 Bulletin Wisconsin Natural History Society. [Yol. 10, Nos. 1 & 2. 
RECONSTRUCTION OF THE CHALCIDID GENUS 
HYPOPTBROMALUS ASHMEAD OF THE FAMILY 
PTBROMAUDJB. 
Its Position, Redescription, History and the Synonymy oE 
Its Type Species. 
By A. Arsene Girault. 
Introductory. 
Quite incidentally, while examining a quantity of pteromalines 
reared from the cocoons of Apanteles congregatus (Say) taken 
from nearly fullgrown larvae of Phlegethontius sexta (Johannsen) 
and having decided by comparison that they were the so-called 
common hyperparasitic Hypopteromalus tabacum (Fitch), I pro¬ 
ceeded to verify the determination by a careful examination of 
their structures. 
The results of this examination showed a different structure 
of the mandibles than one would expect from the present tribal 
position of the genus, or from the description of what was desig¬ 
nated as its type species— Pteromalus tabacum Fitch. Other exam¬ 
inations made of the mandibles of two series of specimens deter¬ 
mined by the late Doctor Ashmead himself agreed with the struct¬ 
ure found in the first, so that there can be no doubt but that all 
three series of specimens are one and the same species. Other 
series of specimens were then compared with the first three series, 
being found identical in every case. 
On account of the fact that the genus itself is but poorly 
described and its type species, due to the times, almost unrecog¬ 
nizably so, I have attempted the following reconstruction based 
on a large series of specimens, as recorded beyond. At first, how¬ 
ever, on account of the characteristic dentation of the mandibles, it 
should be stated that the removal of the genus from the Ashmea- 
dian Pteromalini to the Rhaphitelini becomes necessary, and that 
its type species, as I find by comparison, and which was first 
pointed out by Riley (1881), is symonymic with what has hereto¬ 
fore been known as Gastrancistrus viridescens (Walsh). The 
history of the genus will be considered later. 
