172 ENTOMOLOGICAL NEWS [June, *2O 



before July. One parasitized jassid was taken by the writer 

 June i, 1915, the earliest date recorded during these observa- 

 tions. 



Only the mature larval and the adult stages of the parasite 

 are treated in this paper, since opportunities to acquire in- 

 formation regarding the appearance of the egg, time of in- 

 cubation and the various instars of the insect have been 

 impossible during the progress of fragmentary studies. 



EMERGENCE OF THE LARVA. 



August 6, 1914, a series of infested Cicadula 6-notata, all 

 females, was captured and placed in a large tube vial with a 

 supply of fresh grass blades. Only those were chosen that 

 bore well-matured sacs as very poor success had been pre- 

 viously had in rearing parasitic larvae in captivity. Even 

 when well supplied with abundant food the jassids would 

 frequently die in the course of a few hours whea confined in 

 a cage, and when taken with small sacs would never survive 

 to their maturity. 



From this lot thus caged a number of dryinid larvae issued 

 during the first day, wandered a while about the containing 

 vial and finally established themselves on grass blades or in 

 corners where they constructed cocoons. In order to secure 

 more definite data, two jassids with single sacs in an advanced 

 stage were then selected and placed in small shell vials with 

 bits of fresh grass. These vials were kept under constant 

 observation under a binocular with thirty diameter power. 



For an hour or more these jassids were very uneasy, con- 

 stantly on the move, flipping their wings and continually 

 trying to disengage the sacs by kicking at them with their 

 spiny hind tibiae. This nervousness becomes more pro- 

 nounced as the parasitic larva nears maturity as jassids with 

 small sacs seldom manifest distress in any manner. 



At 10 a. m. a perpendicular rent or slit was noticed in the 

 sac attached to one of these prisoners, and the white body 

 of the larva in violent agitation was visible through this 

 rupture. The opening was in the rear or pouch-like end of 

 the sac, at right angles to the brown bands and was plainly 



