August, ’18] 
FELT: NEW GALL MIDGES 
383 
This species runs in the key to M. emarginata Felt, from which it is 
easily separated by both colorational and structural characters. It 
presents a remarkable similarity to Retinodiplosis with which it is 
evidently associated and upon which it may prey. The two species, 
under a hand lens, appeared almost indistinguishable, except that the 
Mycodiplosis was somewhat smaller. The color characters of this 
midge are partly conjectural. Type Cecid a 2917a. Named in honor 
or of Doctor A. S. Packard, one of the first American Entomologists 
to study the gall midge fauna of our pines. 
Retinodiplosis albitarsis n. sp. A series of both sexes was reared 
in June, 1918, from a white pine ( Pinus strobus ) branch one and one- 
half inches in diameter, infested with Parharmonia pini Kell. The 
exuded masses of pitch were inhabited by midge larvae which trans¬ 
formed therein and produced large sized, dark colored adults with very 
constant, striking tarsal markings. The very similar Mycodiplosis 
packardi was also reared, the larva of this latter apparently deserting 
the pitch masses prior to transforming. This Retinodiplosis has the 
general structural and color characters of R. palustris Felt, from which 
it is most easily distinguished by the distinct narrow femoral and tibial 
white annulations and yellowish white distal three tarsal segments of 
the posterior legs. 
Male. Length 3 mm. Antennae two-thirds the length of the body, fuscous yel¬ 
lowish or dark brown, fourteen segments, the fifth having stems as long and one-half 
longer than their diameters respectively, the basal enlargement subglobose, the distal 
enlargement with a length one-fourth greater than its diameter, vasiform. The cir- 
cumfili with moderately long, rather abundant stout loops. Terminal segment produced, 
the basal stem with a length twice its diameter, the distal enlargement pro¬ 
duced, with a length over twice its diameter and apically with a small conical 
appendage. Palpi; first segment short, irregular, the second with a length three 
times its diameter, the third a little longer than the second, the fourth nearly as 
long as the third and somewhat dilated apically. Mesonotum dark reddish brown, 
the submedian lines thickly haired. Scutellum dark brown, apically thickly 
clothed with yellowish scales. Postscutellum reddish brown. Abdomen sparsely 
haired, deep reddish brown, genitalia fuscous, Wings thickly clothed with short, 
dark hairs, subfuscous. Halteres yellowish basally, fuscous subapically, whitish 
apically. Coxae dark brown, femora basally fuscous yellowish, subapically fuscous, 
narrowly annulate with white apically. Tibiae dark brown, narrowly annulate 
with white apically. Tarsi dark brown except the yellowish white distal three seg¬ 
ments of the posterior legs. Claws moderately long, slender, curved, the pulvilli a 
little shorter than the claws. Genitalia; basal clasp segment moderately long, stout; 
terminal clasp segment rather short, stout; dorsal plate deeply and triangularly in¬ 
cised, the lobes irregularly triangular and narrowly rounded apically. Ventral plate 
rather long, moderately broad and tapering to a broadly rounded apex. Style long, 
stout, broadly rounded apically. 
Female. Length 5 mm. Antennae extending to the third abdominal segment, 
sparsely haired, fuscous yellowish, the fifth subsessile, cylindrical, with a length two 
and one-half times its diameter. Terminal segment somewhat produced, tapering to 
