ART. 15 NEW GENEKA AND SPECIES OP MUSCOID FLIES ALDBICH 5 



extending up the middle, the inner half bare. Vibrissae slightly 

 above the oral margin, which is rather strongly protuberant. Eyes 

 hairy; cheek nearly half the eye height. Palpi yellow, of ordinary 

 size; proboscis short; both pairs of verticals developed; front with 

 rather dense erect dark hair. Ground color of head pale brownish, 

 with thin whitish pollen on the face and around the posterior orbit, 

 in some lights extending on the cheeks and up the anterior orbit 

 nearly to the vertex. Most of the parafrontal area shining trans- 

 lucent brownish in color. Antennae reaching almost to the vibris- 

 sae, third joint rather slender, two and one-half times the second. 

 Second aristal joint several times as long as wide, about one-fifth 

 as long as the last joint; the thickening of the arista extending al- 

 most to its middle, but not very striking. The basal joints of the 

 antennae dark brown, third joint black. 



Thorax reddish brown with the dorsum black except in front of 

 the scutellum, above the wing, and around the humerus, where it is 

 more brownish. Pleura brown anteriorly; lower part of sterno- 

 pleura, most of the pteropleura, and posterior part blackish. Scutel- 

 lum reddish brown, with four pairs of marginal bristles, the middle 

 or apical ones nearly as large as the others, slightly decussate. 

 Sternopleural 4; posterior dorsocentral 4; acrostichal 3, 3. 



Abdomen rather broad, with dense erect coarse hair; ground color 

 mostly reddish brown, black immediately behind the scutellum to 

 the end of the second segment; first and second segments with a 

 single pair of marginal bristles, third with a marginal row, fourth 

 with a somewhat irregular row before the middle and another about 

 the posterior two-thirds. Genitalia small and concealed. 



Legs including coxae reddish brown, with all the pulvilli and claws 

 decidedly enlarged. Middle tibia on outer front side with four 

 bristles before middle, increasing in size, the first quite small. Hind 

 legs absent. 



Wings considerably infuscated on the anterior basal part, the dark 

 color following the veins throughout, noticeably on the anterior 

 cross vein. Hind cross vein almost parallel with wing margin; 

 fourth vein with rounded rectangular bend, thence slightly concave 

 to margin. Third vein with two or three setules at base. Calypters 

 white, the hind ones translucent. 



Female. — The single female is somewhat paler than the male, 

 but the mesonotum shows four distinct blackish stripes and a some- 

 what connected transverse blackish band behind the guture. Eyes 

 very distinctly pilose. Abdomen with more scattered pile, which 

 is not so coarse and erect as in the male. The third segment in some 

 lights shows tessellated thin pale pollen as far as the marginal row 

 of bristles. 



Length, male, 9.5 mm. ; female, 8 mm. 



