168 SEVENTEENTH Report STATE ENTOMOLOGIST OF MINNESOTA—1918 
by endosmosis. The host shows no sign of sickness at first, and 
eats voraciously. But generally, when the period arrives at which 
normally the larva would change to a pupa, the host sickens and 
dies. 
Vig. 44. Brachistes, sp., femaie. Bred Fig. 45. Brachistes, sp., male. <A 
from borers ir poplar. Braconid. 
To indicate the fecundity of these insects, and by inference, 
their usefulness, we might cite the case of Microgaster. As many 
as 1,200 specimens of 
this genus have been 
raised irom, a) -simele 
Lepidopterous larva. 
The following are 
found in Minnesota: 
(Blacus) Eubadizon 
gracilis Brues, Ichneuti- 
dea secunda Roh., reared 
from larvae of the Purs- 
lane Sawfly by S. Mar- 
covitch, also taken in 
Rock Co;, Sept. 9. sve 
crodus simillimus Cress, 
Chelonus sericeus Say, 
\ (Chelonus, sp. Sept. 10 
Fig. 46. Meteorus, sp. in Rock ConiGwelees 
