120 NEW YORK STATE MUSEUM 
Male. Length 1 mm. Antennae fully one-half longer than the 
body, thickly clothed with coarse setae, dark brown; fourteen seg- 
ments, the fifth (fig. 19) with stems three and four and one-half 
times their diameters respectively; the terminal segment, basal 
enlargement somewhat flattened, the basal portion of the stem 
produced, the distal enlargement produced, subcylindric and bearing 

Fig. 19 Giardomyia photophila, 
fifth antennal segment of male (en- 
larged, original) 
a slender, spindle-shaped appendage about three-fourths its length. 
Palp1; probably consisting of four segments. Mesonotum yellowish 
brown, submedian lines indistinct, sparsely clothed with fine setae. 
Scutellum reddish brown with sparse apical setae, postscutellum 
dark brown. Abdomen bright carmine, rather thickly clothed with 
fine, yellowish setae. Wings (pl. 16, fig. 4) hyaline, costa pale 
straw, membrane sparsely clothed with fine setae; halteres yellowish 
transparent basally, reddish fuscous apically. Legs a nearly uniform 
reddish brown; claws long, slender, bent at nearly right angles, 
simple. Genitalia (pl. 19, fig. 7); basal clasp segment rather long, 
a subtriangular lobe basally; terminal clasp segment swollen at the 
base; dorsal plate broad, deeply and triangularly incised, the lobes 
broadly rounded distally; ventral plate stout, swollen at the basal 
third, tapering, broadly emarginate. Type Cecid. 323. 
Giardomyia emarginata Felt 
1908 Felt, E.P. N.Y. State Mus. Bul. 124, p. 405 
The bright-red male has the terminal segments yellow. It was 
taken July 2, 1906 in a trap lantern at Newport, N. Y. 
