400 NEW YORK STATE MUSEUM 
bbb Abdomen deep reddish, length 1 mm; 5th antennal segment having 
the stems 2% and 4 times the length of their diameters ........... 
hudsonica n. sp., C. 200 
bbbb Abdomen dark reddish brown, length 1 mm; 5th antennal segment 
having the stems 21%4 and 3% times the length of their diameters. . 
MIO MEA IM 2, i, Cd, Cy eas, Ho: 
METADIPLOSIS 1. &. 
This genus is easily distinguished from the ordinary type of 
Cecidomyia by the unique genitalia, the basal clasp segment being 
short, stout, broadly rounded and with conspicuous triangular, chiti- 
nous processes at the internal angles, while the terminal clasp seg- 
ment is short, greatly constricted near the middle, enormously swol- 
len and recurved apically. 
Type and sole species Metadiplosis spinosa mn sp. 
Metadiplosis spinosa p. sp. 
Male. Length 1 mm. Antennae dark brown, the basal segments 
yellowish. Mesonotum dark brown, ¢he submedian lines indistinct. 
Scutellum reddish yellow, postscutellum reddish brown. Abdomen 
light reddish brown, rather thickly clothed with pale setae and 
slightly fuscous distally. Wings hyaline, halteres yellowish basally, 
semitransparent apically. Legs a nearly uniform dark brown. 
Taken at Albany, N. Y., July 14, 1906, on quack grass. 
Iyoe (C. 572, IN. W. Suawe Miuseunn, 
EPIDIPLOSIS n. g. 
This genus is erected for a species remarkable because of the 
enormously produced, curved, setose-bearing spine on the basal 
clasp segment, this peculiar organ being nearly as long as the termi- 
nal clasp segment and strongly suggesting the genitalic modification 
we find in Lobodiplosis. It is, however, readily separable from this 
last named genus by the simple claws. 
U\7OS Aine! SOLS Goscies ID OIGijplOsSis Sayi m, Sp. C. AZO, 
Epidiplosis sayi n. sp. 
Male. Length 6 mm. Antennae light brown, yellowish basally ; 
face fuscous yellowish. Mesonotum fuscous brown, the submedian 
lines narrow. Scutellum reddish brown, postscutellum yellowish, 
the basal and terminal abdominal segments yellowish orange, the 
oe ee 
