16 BULLETIN 133(3,, U. S. DEPARTMENT OF AGRICULTURE 
NATURAL ENEMIES 
Ten species of parasites were reared from Pla th ypena sea bra collected 
in Tennessee, and 18 more have been reported from other localities. 
Fourteen of these are Hymenoptera and 14 Diptera. Predators and 
fungi were also found to attack this insect extensively. 
HYMENOPTERA. 
Apanteles harnedi Vier. 3 was reared by the writer from larvae col- 
lected at Nashville and Knoxville, Tenn., in the years 1914, 1915, 
and 1916, and by C. L. Scott at Brownsville, Tex., March 30, 1913. 
A campoplegine, probably a new species and new genus, was 
recorded by Sherman (10) as reared in North Carolina. 
Euplectrus comstockii How. was reported by C. N. Ainslie as very 
commonly parasitizing Plathypena scabra in the vicint}^ of Elk 
Point, S. Dak. 
Euplectrus platyhypenae How. was reared from this host at Wash- 
ington, D. C. ; on Julv 11, 1882, from material collected in that 
vicinity, and was described by Howard (6) who named it after the 
genus Plathvpena. 
Hemiteles sp. 4 was reared bv P. Luginhill at LaFavette. Ind., 
April 2, 1912. 
Meteorus sp.; one specimen 5 was reared bv the writer at Nash- 
ville, Tenn., in 1915. 
Mesochorus sp.; a single specimen 5 was reared by the writer at 
Nashville, Tenn., in 1915. 
Microgaster facetosa Weed 6 was reared from this host at Knoxville 
and Nashville, Tenn.. by the writer, and at Hagerstown, Md.. bv 
H.L.Parker (S). 
Microplitis varicolor Vier. was reared from this host at Columbia, 
S. C, by E. J. Kewley, and by the writer at Nashville, Tenn. (8). 
Rhogas canadensis Cress. ; a single specimen 7 was reared from 
Plathypena scabra by Philip Luginbill at LaFavette, Ind., in 1911. 
(Rhogas) Aleiodes intermedins Cress, was reported by Hawley (4) 
as reared from a P. scabra larva collected in New York. 
Rhogas nolophanae Ashm. 8 was the most common parasite at Nash- 
ville, Tenn., in 1914. It was reared from larvre collected in the spring, 
the adults first appearing about the 20th of May. The cocoon is 
yellowish-brown, slender, from 8 to 10 millimeters long by 1.75 
millimeters wide, and formed from the shrunken and stiffened skin 
of the caterpillar. Not more than one individual was reared from 
a single host. Six specimens each passed eight days in the cocoon. 
The exit hole is made on the dorsum in the vicinity of the sixth and 
seventh abdominal segments. 
Rhyssalus loxoteniae Ashm. was reported by Hawley (4) as reared 
from a larva of this insect collected in New York. 
Trichogramma pretiosa Kiley was recorded by Sherman (10) as 
being a very common parasite of the egg in North Carolina. 
3 Four specimens reared in Tennessee determined by A. B. Gahan. 
* One specimen determined by H. L. Viereck. 
6 Determined by A. B. Gahan. 
6 Eleven specimens from Knoxville, Tenn., determined by A. B. Gahan. 
7 Determined by H. L. Viereck. 
■ Nine specimens determined by A. B. Gahan. 
