SARCOPHAGA AND ALLIES 81 



Forty-eight males: Mass., N. Y., Pa., Ind., 111., 

 Alab., Kans, Ida., Wash., Calif. 



Sixty-five females: Mass., N. Y., Pa., Ind., 111., 

 S. D., Ida., Wash., Cahf. 



Type. — In University of Kansas. 



The type locality is Brookings, S. D., the original 

 pair having been bred from Cimhex amencana, the 

 Willow Sawfly, by the writei-; date of emergence, 

 May 30 and June 2, the specimens having wintered in 

 the host or its cocoon. On account of the omission in 

 the original description of the villosity of the hind 

 tibiae, Mr. Coquillett, Mr. Parker and myself had all 

 come to a wrong conclusion regarding the identity of 

 the species, which I was enabled to rectify in Novem- 

 ber, 1914, by an examination of the types, and by 

 spreading the genitalia of the male. 



Mr. Parker's material came from various states, 

 ranging from Maine to California and as far south as 

 Virginia. 



Several abnormalities occur in the series of fe- 

 males, which make their allocation with the proper 

 males still more difficult. Several have two stpl while 

 provided with anterior acrostichals ; two have pre- 

 scutellars and no anterior acrostichals; one has only 

 two postsutural dorsocentrals, the hindmost one being 

 absent on both sides ; one has two stpl on one side and 

 three on the other. These deviations would nearly if 

 not quite include the female of hisetosa. 



No. 29. Sarcophag-a bisetosa Park. 



Parker, Proc. Boston Soc. Nat. Hist., vol 35, p. 69, pi. v, 

 f. 34, and pi. viii, f. 48, male only (Bottclieria). 

 This species was separated from cimbicis by 

 Parker mainly by the characters given in the table, — 

 absence of anterior acrostichals and only two sterno- 

 pleurals. Beyond these the differences are mainly 

 genitalic; they are slight except in the shape and size 

 of the penis. This organ in bisetosa is large, elbowed 

 behind, and the lateral distal lobes turn back at a very 

 unusual angle, and are much larger than in cimbicis. 



