62 PROC. ENT. SOC. WASH., VOL. 23, NO. 3, MAR., 1921 



of heel; bb, bristle bearing part of heel; ca, heel ( = calx); cr 1, first 



lobe of crown ( = corona); cr 2 and cr 3, carinated second and third 



lobes of crown. 

 Fig. 25. Popillia. Molar structure of left mandible: Bb, bristle bearing base 



of heel; Ca, heel ( = calx); H, hook ( = hamus); L 1 and L 2, first and 



second lobes of crown. 



Fig. 26. "Strigoderma?" Same view as fig. 24. 

 Fig. 27. "Strigoderma?" Same view as fig. 23. 



ANAPHOIDEA CONOTRACHELI GIRAULT (HYM.) AN EGG 

 PARASITE OF THE APPLE MAGGOT. 



Bv B. A. PORTER AND C. H. ALDEN. 



In the course of studies of the apple maggot, Rhagoletis 

 pomonella Walsh, carried on at Wallmgford, Conn., it was noted 

 by the junior author that a number of eggs dissected out of 

 apples collected in the field were parasitized. Adults were 

 reared, and determined by Mr. A. B. Gahan as Anaphoidea 

 conotracheli Girault. 



This Mymarid is very common as an egg parasite of the plum 

 curculio, having been reared from that host on various fruits 

 from many localities, including most of the Atlantic States from 

 Connecticut to Georgia, and from Kentucky and Texas. It has 

 also been reared from the eggs of the grape curculio, Craponious 

 inaequalis Say, but so far as is known, no record has been made 

 of this species as a parasite of the apple maggot. Individuals 

 were reared by the writers from apple maggot eggs from two 

 localities in the vicinity of Wallingford. 



The life cycle from egg to adult for this parasite in the eggs of 

 the curculio has been shown to be ten to eleven days, and is 

 presumably not very different in that of the apple maggot. 

 The egg-laying period of the second host follows shortly after 

 that of the first, offering a very favorable succession of host 

 material, enabling the parasite to breed almost without inter- 

 ruption from June until September. 



The process of oviposition has not been observed. Parasi- 

 tized eggs turn dark, especially in the middle portion, the part 

 usually occupied by the parasite, the eyes showing through the 

 shell as dark red. In emerging, the tiny parasite chews a hole 

 in the side of the egg, and, instead of emerging through the egg 

 puncture, it makes its way directly to the surface of the apple 

 and chews its way through the skin, making an exit hole con- 

 siderably smaller than the egg puncture and at a little distance 

 from it. As has been noted with the eggs of the curculio, a few 

 of the maggot eggs contained two parasites. 



Counts made of material collected near Wallingford gave per- 



