158 NEW YORK STATE MUSEUM 



intemaliy with a notch at the basal third, narrowly rounded; ventral 

 plate rather long, broad, deeply and broadly emarginate, the lobes 

 widely separated, narrowly rounded; style short, stout, broadly 

 rounded. 



Female. Length 3 to 4 nun. Antennae nearly as long as the body, 

 sparsely haired, fuscous yellowish; fourteen segments, the fifth with 

 a stem about one-third the length of the subcylindric basal enlarge- 

 ment, which latter has a length twice its diameter; terminal seg- 

 ment produced, with a length three times its diameter and apically 

 with a short, stout process swollen basalfy. Palpi; first segment 

 subquadrate, the second a little longer, stouter, the third fully twice 

 the length of the second, rather stout, the fourth as long as the 

 third. Mesonotum dark brown, the submedian lines fuscous yel- 

 lowish. Scutellum and postscutellum fuscous yellowish. Abdomen 

 dark reddish. Halteres yellowish transparent. Legs fuscous 

 yellowish. Ovipositor s'hort, the terminal lobes narrowly oval, with 

 a length twice the width. Otherwise nearly as in the male. 



Described from females reared from resin masses on hard pine in 

 association with a male, which latter compared very closely with 

 Osten Sacken's type in the Museum of Comparative Zoology. This 

 female is not readily separated from that of Retinodiplosis 

 inopis O. S., though the latter, judging from specimens reared 

 in the bureau of entomology at Washington, is a larger and darker 

 form and differs from the species under consideration by deserting 

 the pitch prior to pupation. 



Parasites. This little insect in spite of its passing a large portion 

 of its existence within pitch masses, is subject to parasitic attack. 

 Miss Eckel, referred to above, has succeeded in rearing three species, 

 as follows : Syntasis diplosidis Eckel, Polygnotus 

 pinicola Ashm., and another belonging to the genus Eupelmus. 



This midge can hardly be considered of much economic import- 

 ance, yet we have observed trees which were seriously weakened by 

 an excessive flow of pitch inhabited largely by the larvae of this 

 species, and we are therefore inclined to believe that in such cases 

 the flow caused by the larvae may seriously weaken a tree. 



Retinodiplosis taxodii Felt 

 1916 Felt, E. P. Ent. News, 27:415-17 

 191 8 N. Y. State Mus. Bui. 200, p. 19 



A nimiber of midges tentatively referred to this genus were reared 

 April 27, 1916, by George W. Barber, Charleston, Mo., from cones 

 of bald cypress, Taxodium distichum, the larvae occiir-. 

 ring in thick-walled somewhat spongy monothalamous galls 5 to 7 



