44 PAPERS ON THE COTTON BOLL WEEVIL, ETC. 



and to feed on the inmate. It makes no choice of the stage of the 

 weevil to be eaten; larva?, pupae, and adults have been found partly 

 devoured. 



ORTHORIS CROTCHII Lee. (PI. I, figs. 3-7.) 



This species was found by Mr. C. R. Jones and the writer breeding 

 in Mentzelia nuclei at Clarendon, Tex. It oviposits in the ripening- 

 seed pods, and the larva makes its cell in the center of six or seven of 

 the flat transverse seeds. Very often four or five weevil cells will 

 lie side by side, occupying a large part of the interior of the pod. 

 The cells are made up of the exuviae of the larvae. Exit is secured 

 thru the open apex of the ripe pod. 



PARASITES. 



Microbr-acon (Bracon) rmperus Cress, was bred in very large numbers 

 as a primary parasite. The air around the Mentzelia bushes was thick 

 with individuals of this and the next species. Several definite records 

 of hyper parasitism by Tetrastichus were obtained. The latter con- 

 struct beautiful little white cocoons, and several feed on one host. 



Tetrastichus sp. A very large number of these specimens were bred 

 from the Mentzelia pods, and several very definite cases of primary 

 parasitism were recorded. 



