Dec, I9I2.] Felt: Studies in Itonidid^. 239 



Porricondyla juvenalis, new species. 



Male. — Length i mm. Antennje probably over twice the length of the body, 

 sparsely haired, at least ii and probably i6 segments, the fifth with a yellowish 

 stem 2]/! times the length of the basal enlargement, which latter is dark brown 

 and has a length twice its diameter. Palpi : first segment slender, with a length 

 four times its diameter, the second as long as the first, a little stouter, the third 

 a little longer than the second, more slender, the fourth 5^ longer than the 

 third. Mesonotum dark reddish brown. Scutellum reddish white, postscutellum 

 brownish yellow. Abdomen dark yellowish brown, the genitalia fuscous yellow- 

 ish. Wings hyaline, halteres pale yellowish, reddish brown apically. Coxas and 

 femora basally mostly pale yellowish, the femora apically and tibiae dark straw ; 

 tarsi fuscous. Genitalia : basal clasp segment quadrate ; terminal clasp segment 

 short, greatly swollen, heavily spined apically ; dorsal plate long, broad, tri- 

 angularly emarginate, the lobes obliquely truncate, setose ; ventral plate mod- 

 erately long, broad, deeply and roundly emarginate, the lobes narrowly rounded, 

 setose. Harpes slender, lancelike, the strongly chitinized apex recurved. Type 

 Cecid a23so. 



The interesting form characterized above was taken by Mr. D. B. 

 Young at Ehn Lake in the Adirondacks, N. Y., August 7, 1912. It 

 is remarkable because of the greatly prolonged antennal segments and 

 is easily separated from the allied P. flava Felt by the lancet-like, 

 recurved harpes. 



Rhabdophaga aceris Shimer. 



1868. Shimer, Henry, Amer. Ent. Soc. Trans., i : 281-83 (Cecidomyia). 



1905. Washburn, F. L., Minn. Agric. Exp't. Sta. Bui. 93, p. 65 {Cecidomyia). 



1906. Felt, E. P., N. Y. St. Mus. Mem., 8, 2: 728 {Cecidomyia). 

 igii. , Econ. Ent. Journ., 4: 452 {Cecidomyia). 



Male. — Length 1.5 mm. Antennae as long as the body, sparsely haired, 

 fuscous yellowish; 15 segments, the fifth with a stem ^^ the length of the cylin- 

 dric basal enlargement, which latter has a length J^ greater than its diameter. 

 Palpi : first segment short, irregular, second irregularly oval, third a little longer 

 and more slender than the second, the fourth Yz longer than the second. Meso- 

 notum dark brown or blackish. Scutellum and postscutellum fuscous yellowish. 

 Abdomen dark brown ; genitalia fuscous yellowish. Legs probably fuscous yel- 

 lowish, the tarsi darker ; claws moderately stout, strongly curved, the pulvilli a 

 little shorter than the claws. Genitalia : dorsal plate divided, the lobes nar- 

 rowly rounded ; ventral plate deeply and triangularly emarginate, the harpes 

 broad, the heavily chitinized apex irregularly and coarsely dentate. 



Female. — Length 2 mm. Antennae extending to the third abdominal seg- 

 ment, sparsely haired, fuscous yellowish; 15 sessile segments, the fifth with a 

 length twice its diameter. Abdomen probably reddish brown, ovipositor nearly 

 as long as the abdomen ; terminal lobes with a length over twice the width, 

 irregularly and narrowly rounded apically. Other characters nearly as in the 

 male. ^2344. 



