34 Bulletin Wisconsin Natural History Society. [Vol. 10, Nos. 1 & 2. 
mounted; two slides, xylol-balsam, $ mandibles and antenna and $ 
wings—antenna). 
2. Hypopteromalus tabaeum (Fitch); 1 $ , 5 $, reared at 
Baltimore, (Sparrows’ Point), Md., February 2, 1904, from a small, 
compact circular mass of erect Apanteles cocoons on a willow leaf, 
covered and hidden by a fluffy mass of fine white silk like the silk of 
some spiders and probably those of Apanteles smerinthi Biley. 
Determined by Ashmead. Accession No. 41051, Illinois State Labora¬ 
tory of Natural History. (5 $ tag-mounted; 2 slides, xylol-balsam, 
9 head, mandibles, antennae and 9 wings, leg and antenna). 
3. Hypopteromalus tabacum (Fitch) : 2 9 captured at large, 
July 10, September 27, 1895; in the Nason collection (Nason, 1906, 
p. 2), tagmounted, plus one slide bearing- two antennae and a pair of 
wings). Determined by Ashmead. 
4. 110 #, 218 9 plus 5, reared during September 1908 from! the 
cocoons of Apanteles congregatus (Say) parasitic on the larvae of 
Phlegethontius sexta (Johanssen), Urbana, Ill. Accession No. 41052, 
Illinois State Laboratory of Natural History. (7 9*6 9 tagmounted; 
xylol-balsam, 9 legs, antenna and mandible—1 slide, # 9 antennae, 
1 slide; $ 9 fore wings—1 slide. Accession No. 39857, (1 #,11 9, 
tagmounted; 1 slide, 9 antennae and mandibles). No. 39931, (1 #, 
1 9, tagmounted; 1 slide, 9 head). 
5. Hypopteromalus viridescens (Walsh) : 1 $, reared in connec¬ 
tion with supposed larvae of Ancylys comptana Frolich, Urbana, 
Illinois (J. J. Davis), July 1, 1906. Accession No. 37248, Illinois State 
Laboratory of Natural History; (1 $, tagmounted; # mandibles, 
xylol-balsam, 1 slide). 
6. “Sphe gig aster ccsruliventris Ashmead” 3 , Riley, in litt., June 13* 
1891: 1 9, reared from microgasterid cocoon similar to those of 
Apanteles congregatus, Quindy, Illinois, October 1886. Accession No. 
10957, Illinois State Laboratory of Natural History. (1 9, tag- 
mounted, cocoon of host). 
7. 7 # , 1 9 of viridescens, reared at Urbana, 111., April 24, 1891, 
from Apanteles cocoon taken from larvae of Phlegethontius on tomato, 
September 20, 1890 (F. M. Webster). Accession No. 16157, Illinois 
State Laboratory of Natural History. (7 #, 1 9 tagmounted, cocoons 
of host; xylol-balsam, $ mandibles, antenna). 
8. 4 9 of viridescens, reared July 2, 1908, in the insectary of the 
state entomologist of Illinois, from the cocoons of Apanteles congre~ 
gatus (Say) on the larvae of Ceratomia catalpa Boisduval, collected 
at Parker, Ill. (L. M. Smith), June 30, 1908. Accession No. 39324, 
3) I have been unable to find trace in the literature of this species; it 
is apparently a nomcn nudum. 
