1910] Girault and Sanders —Chalcidoid Parasites 117 
homotype in U.S. N. M.) (5) One male appeared on October 2 in 
company with a number of Muscidifurax from a large lot of puparia 
of Musca domestica reared from maggots in horse manure and ex- 
posed to parasites for three days, Sept. 8-11. On Sept. 17, the host 
puparia were isolated in gelatine capsules and from one of these 
puparia the male emerged. The puparium contained the host pupa 
in fragments and the single, large meconium of the parasite. (Ac- 
cession No. 40171, 1° tagmounted). (6) Nine days later, October 
11, from each of these isolated puparia of the same lot (Musca 
domestica) there emerged two males and one female. Both Spa- 
langia and Muscidifurax were very common in this experiment. 
(Accession No. 40206, 2°’s, 1° on tags). 
The characteristics of this species are the blackish eneous color, 
the generally uniformly fuscous legs, the concolorous ¢oxe, the gen- 
erally fuscous scape, pedicel, and basal ring-joints, the remainder 
of the antenne being neutral in color or nearly concolorous with the 
body, the polished abdomen and uniform sculpture of the thorax, the 
position and shape of the ocelli and the hyaline wings. 
Among the thousands of Chalcidoid, mostly pteromalid, parasites 
reared from muscid and other Dipterous larve during the course of 
breeding experiments with the house fly during the latter part of 
the season of 1908 this species occurred very rarely as recorded in 
the foregoing. 
Type: — Type No. 12260, United States National Museum, 
Washington, D. C., 1 °, tagmounted (C. F. Baker). Homotypes :— 
1°, 1° in the same collection, Urbana, Illinois, both tagmounted. 
Nothing is known concerning the biology of this genus. The 
adults emerge (three cases) from the host puparium through a 
single circular hole with jagged edges but so far we know of no 
characteristic distinguishing these emergence holes from those of 
Spalengia or Muscidifurax. The meconium is a single dark com- 
pact mass circular in outline, but is not very characteristic and 
beggars description. 
