25 



Of the parasites bred most of them are peculiarly orthopterous ene- 

 mies belonging to the genus Sarcophaga. Of the {lies reared there 

 were six Sarcophagids, two Tachinids, and one Muscid. The identifica- 

 tions were made by Mr. Coquillett and are as follows: Sarcophaga sar- 

 racenece Rile}^ (fig. 9), S. assidua Walker (fig. 10), S. sp. near incerta 



Fig. 10.— Sarcophaga assidua: Pupanum at left; adult in middle, with enlarged antenna; larva with 

 enlarged parts at right— enlarged (from Howard). 



Walker, S. sp. near cimbicis Towns., S. hunteri Hough, Ilelicobia 

 helicis Towns., Euphorocera claripennis Macq. (fig. 11), Acemyia den- 

 tata Coq., Lucilia ccesar Linn. (fig. 12). 



Of the above species Ilelicobia helicis Towns, was the commonest fly 

 bred. By isolating specimens of the differential locust, in order to 

 derive information relative 

 to its life history, a part of 

 the life history of Helico- 

 bia helicis was incidentally 

 reached. May 26, 1900, a 

 specimen of grasshopper of 

 the third stage was placed in 

 cage. The last three molts 

 were successfully accom- 

 plished and a few days after 

 this female — for the speci- 

 men proved to be a fe- 

 male — had reached maturity 

 a male was given her. Mat- 

 ing took place twice and a 

 single pod of 132 eggs was 

 deposited. August 16, 1900, 

 the female died and was placed in a separate tube cage for further 

 examination. During the period between August 28 and September 

 1 six maggots of Ilelicobia helicis emerged from the body of this grass- 

 hopper. Within forty-eight hours all had entered the puparia, and 

 on September 17 the last of the flies appeared. From the above 



Fig. 11.— Euphorocera ciartpenn-us: Adult with enlarged 

 antenna and with empty puparium at right — enlarged 

 (from Howard). 



