no. 2070. PARASITIC AND PREDACEOUS DIPTERA— WALTON. 177 



yellowish, shining, pollen. First segment with a semicircular, 

 black, subscutellar spot, destitute of median marginal bristles. 

 Second, third, and fourth segments yellowish brown with a median, 

 faint, blackish, band which becomes prominent in greasy specimens. 

 These segments bear both discal and marginal macrochaetae, the 

 former sometimes arranged irregularly. Hypopygium reddish, nearly 

 concealed in abdomen. Coxae, femora, and tibiae reddish; a brown 

 patch appears on the under surfaces of knees in the posterior femora. 

 Tarsi blackish, claws of male elongate, pulvilli smoky at base, paler 

 at apices. Wings rather narrow, veins brown, costal spine obsolete. 

 A slight brownish stain bordering the anterior cross vein. Apical 

 cell distinctly open in male, in female sometimes nearly closed. 

 Bend of fourth vein abrupt, without stump or wrinkle. Third vein 

 bearing three or four weak, short bristles at base. 



Habitat. — Eagle Tail Mountain, Colfax County, New Mexico. 

 Described from four specimens. One pair taken in copulation and 

 pinned together. 



Type.— Female; Cat. No. 18342, U.S.N.M. 



RHYNCHIODEXIA STRIATA v. d. Wulp. 



Two specimens corresponding closely to Van der Wulp's figure and 

 description from Eagle Tail Mountain. 



Genus ZELIA Desvoidy. 



ZELIA WILDERMUTHII, new species. 



Plate 6, figs. 2 and 3. 



Opaque cinerous, nowhere shining, wings grayish hyaline, legs 

 reddish. Antennae yellow. Length, 10-13 mm. 



Head much higher than long, slightly longer at base of antennae 

 than at vibrissas. Cheeks two-thirds as wide as eye height, cinere- 

 ous ; a reddish yellow, irregular, reflecting stain running from lowest 

 corner of eye to vibrissal angle. Front in female one and one-half, 

 in male two-thirds as wide as eye. Median vitta of same width in 

 both sexes, reddish brown, twice as wide at base of antennae as at 

 apex of ocellar triangle. Female bearing two pairs of orbitals, 

 absent in male. Two pairs of ocellar bristles, present in male, the 

 posterior pair much reduced in female. Frontal bristles rather 

 weak, not extending below base of second antennal joint. Antennae 

 slender, reddish yellow; in female three-fourths, in male two-thirds 

 as long as face. Third joint concave on anterior margin. Arista 

 reddish, thickly and finely plumose, in female longer than third 

 antennal joint, second joint short. Second antennal segment bear- 

 ing a long slender bristle nearly or quite one-half length of third 

 antennal joint. Vibrissae situated on oral margin. Palpi and pro- 

 boscis reddish yellow, the latter very short and fleshy. Genae and 

 59758°— Proc.N.M.vol.48— 14 12 



