20 BULLETIN 889, U. S. DEPARTMENT OF AGRICULTURE. 
from 2 to 3 days the parasite larva hatches and eg SS searches 
out its Languria host. 
The duration of the larval period during the Snareh of June was 
found to be 8 days, with an average mean temperature of 81° F., 
while the larval stage 
length of another 
specimen was 13 days, 
from March 28 to 
April 10, durme a 
mean temperature of - 
60° F. 
The pupa isfreeand 
the stage is passed 
within the Languria 
burrow. The pupal 
stage length of 6 
specimens averaged 
92 days, while a sin- 
gle specimen, during 
the month of April, had a pupal stage length of 19 days. The records 
are given in Table VII, which follows: 
yl dy 
pete yt 
Fic. 6.—Habrocytus languriae, a parasite of the clover stem-borer. 
Taste VII.—Length of pupal period of the parasite Habrocytus languriae. 
ey 3 ; Average 
; Adult upa mean 
Pupated.| isued. | period. |tempera- 
ture. 
Fea (eee WM Pee ee oe ee 
1916. 1916 Days. a oe 
May 8] May 17 9 72 
0. May 16 8 72 
May 9]| May 18 9 72 
May 13 | May 24 bE 70 
May 16 | May 27 il 69 
June 30] July 10 10 86 
April10 | April 29 19 68 
OTHER PARASITES. 
The next most important parasite reared from Languria larvee 
was Heterospilus sp. This was first reared by the senior author in 
1912, and again in September, 1915, by the junior author. Three 
specimens of Eurytoma sp. were reared by the junior author during 
August, 1915, from Languria larve, while the senior author in May, 
1916, reared the same speciés from the larve of Habrocytus langurvae. 
Tn this case it had a larval stage of 10 days and a pupal stage of 13 
days, and, as is noted, was a distinctly secondary parasite. The value 
of this parasite, therefore, in keeping Languria mozardi in check is 
questionable, since it is both primary and secondary in habits, The 
