262 PBOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



cell united with the discal, anal cell wanting^ costal vein extending 

 beyond the apex of the fourth vein ; legs destitute of stout macrochsetse. 

 Type, the following species: 



PTILOMYIA ENIGMA, new species. 



Female : Black, the lower side of the third antenna! joint and bases of 

 tarsi yellow, halteres yellowish white; head, thorax, and scutellum 

 opaque, dark-gray pruinose, abdomen slightly polished, very thinly 

 brownish pruinose, ovate, composed of six segments, the first and sixth 

 very short, the others subequal in length, each about three times as 

 long as the sixth; wings whitish hyaline, first vein extending slightly 

 beyond the small crossveiu, apex of second vein slightly nearer to apex 

 of first than to tip of third vein, first posterior cell slightly widening 

 toward its apex, last section of the fourth vein nearly one and one-half 

 times as long as the penultimate section, hind crossvein slightly shorter 

 than the last section of the fifth vein. Length, 0.9 mm. A single 

 specimen, collected at Bayamon in January. 



Type.—Gd^t. No. 4379, U.S.IST.M. 



Family DEOSOPHILID^. 



STENOMICRA, new genus. 



Wings narrow, oblanceolate, the aluhe wanting, the posterior margin 

 of the wing convex from base to apex, first vein reaching only to the 

 branching of the second and third veins, small crossvein midway 

 between this branching and the hind crossvein, the latter about eight 

 times its own length from the apex of the fifth vein, penultimate section 

 of the fourth vein about one-eighth as long as the last section, first 

 posterior cell narrowed at its apex, second basal cell united with the 

 discal, anal cell present, tip of second vein nearly midway between 

 the apices of the first and third veins, costal vein prolonged beyond 

 the apex of the fourth vein ; ocelli situated near the center of the front, 

 two pairs of vertical bristles and one fronto-orbital, the latter situated 

 below the middle of the orbits, no ocellar nor postvertical bristles; 

 second joint of antennse bearing a short, forwardly directed macrochtfta 

 near the upper outer corner, the third joint broader than long, rounded 

 at the apex, arista bearing several long bristles on the upper side and 

 with a few shorter ones on the lower side; face in profile slightly concave, 

 projecting forward at the oral margin, vibrisste distinct; mesonotum 

 destitute of short bristly hairs, bearing two pairs of dorsocentral 

 niacrochiiettTe, scutellum with a single pair; tibiai destitute of a pre- 

 ax)ical bristle. Type, the following species: 



STENOMICRA ANGUSTATA, new species. 



Head and its members yellow, the front and occiput opaque, thinly 

 whitish ])ruinose, an ocellar dot black; mesonotum and scutellum 



