200 NEW YORK STATE MUSEUM 



Both of these insects were reared from exuded masses of pitch pro- 

 duced by Parharmonia pini Kell. and in the case of the 

 Retinodiplosis, at least, development and transformations occurred 

 within the pitch and the probabilities are that the same is true, 

 though possibly to a more limited extent, of the Mycodiplosis. 



Mycodiplosis aurata Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 402 



The brownish orange male was taken June 11, 1906 on maple 

 leaved arrow-wood, Viburnum acerifolium, at Albany, 

 N. Y. 



Male. Length 1.5 mm. Antennae one-half longer than the body, 

 rather thickly haired, reddish brown; 14 segments, the fifth with 

 stems two and two and one-half times their diameters; terminal 

 segment produced, the basal portion of the stem with a length six 

 times its diameter, the distal enlargement subcylindric, with a length 

 nearly four times its diameter and bearing apically a long, rather 

 stout, fingerlike process. Palpi; the first segment short, stout, 

 irregularly subquadrate, the second rather stout, with a length 

 four times its diameter, the third a little longer and more slender 

 than the second, the fourth one-third longer and more slender than 

 the third. Face pale yellowish brown; eyes black. Mesonotum 

 rather dark brown, the submedian lines yellowish, sparsely haired. 

 Scutellum and postscutellum pale orange, the former sparsely haired. 

 Abdomen a bright orange with the basal segments and genitalia 

 slightly fuscous and sparsely clothed with fine, reddish hairs, which 

 latter are somewhat abundant laterally. Wings hyaline, costa light 

 brown. Legs a nearly uniform pale straw; claws long, stout, strongly 

 curved, the pulvilli rudimentary, about one-fourth the length of 

 the claws. Genitalia; basal clasp segment long, stout; terminal 

 clasp segment short, stout; dorsal plate long, deeply and narrowly 

 incised, the lobes broad, tapering, sub truncate; ventral plate long, 

 broad, broadly and slightly emarginate; style stout. Type Cecid. 

 212. 



Mycodiplosis silvana Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 402 



The dark, reddish brown male was taken June 14, 1906 on hem- 

 lock, Tsuga canadensis, at Nassau, N. Y. 



Male. Length 1.6 mm. Antennae one-half longer than the body, 

 thickly haired, light brown; basal segments yellowish; 14 segments, 

 the fifth with stems each with a length two and one-half times its 

 diameter; terminal segment, distal enlargement with a length about 

 three times its diameter, strongly constricted near the basal third, 

 apically a long, tapering, fingerlike process. Palpi; the first segment 





