On Certain Seed-Infesting Chalcis-Flies. 373 



posterior median notch at the insertion of the abdomen very deep, 

 extending one-half the length of the sclerite, sculpture between the 

 spiracles longitudinally striate, on the sides and along the posterior 

 margin shingled. Spiracles oblique, elliptical. 



Antennse gently clavate, dark brown, almost black; scape yellowish, 

 infuscate at tip and on upper side; pedicel and funicle joints subequal, 

 clothed with short, fine, brownish hairs; white longitudinal ridges on 

 funicle joints arranged with their bases in two irregular rows and only 

 a part of them extend to the tip of the segment. 



Coxae same color as thorax; anterior and middle coxae shingled; pos- 

 terior coxse reticulate without, shingled on the inside; rest of legs dull 

 yellowish; posterior femora with a broad median band of metallic green; 

 last tarsal joints infuscate. 



Wings hyaline; stigmal vein as long as diameter of club, hook of club 

 acute and directed toward the tip of post marginal, the four sensoria 

 arranged in a straight line. Base of wing not entirely naked, a row of 

 five hairs near base and an L-shaped row back of middle of marginal vein. 



Abdomen with second segment polished, the remainder shining, finely 

 sculptured with delicate impressed lines forming an irregular reticula- 

 tion. Cerci bearing pale hairs. Sheath of ovipositor brown. 



Male. — Length, 2.75 mm.; thorax, 1.4 mm.; abdomen, 1.2 mm. 



Sculpture of head and thorax as in female; scutellum behind trans- 

 verse furrow not smooth, finely pustulate. 



Antennae stouter than in female; scape black, strongly compressed; 

 flagellum clothed with stouter and more abundant hairs than in female. 

 Legs as in female except that posterior femora are metallic green except 

 at the extreme base and tip. 



Abdomen shorter and broader than in female, second segment polished, 

 the remainder metallic purplish, sculptured more distinctly and clothed 

 with more abundant hairs than in female. 



Among the specimens from which the description was made is one 

 determined by Dr. L. O. Howard and two specimens sent the writer 

 by S. Mokshetsky, reared by him from wild-apple seeds in Crimea. 

 This makes it certain our species is the same as the European. 



Varieties of fruits infested. — As a rule, the smaller sized varieties of 

 fruit are more subject to the attacks of this insect. Fig. 75 shows, 

 however, that there may be considerable range in the size of the mature 

 fruit. It may be that the reason for the immunity of certain varieties 

 does not depend on their size at maturity but on the fact that at the 

 time the females appear they are too large for the ovipositor to reach 

 the seeds; but no observations have been made on this point. 



