ABT. 7 AMEEICAN- MUSCOID FLIES IN VIEN"NA MUSEUM ^ALDEICH 29 



slight concavity in the costa before the extreme apex ; the third vein 

 has only one bristle at base above and below. The species is not 

 represented in the National Museum, although Dr. C. H. T. Town- 

 send had identified a closely related form with less elongated wing 

 as " eqy£s subspecies with golden squamae." Mr. Malloch had named 

 the same species Morinia longitofrsus Wulp, but I do not think it fits 

 the description very well. The color of the thorax is sharply divided 

 at the suture, being golden in front and dark brown behind. The 

 slender abdomen is subshining black, with silver fasciae at base of 

 second and third segments, narrower across the dorsum but broad 

 laterally ; the fourth segment is wholly silvery except a narrow black 

 tip which bears a considerable tuft of bristles. There are no discals 

 on the second and third segments. The first segment is uncom- 

 monly long, exceeding the second, but has no median marginal 

 bristles; the second has one pair and the third a row of about six; 

 the fourth has no discal bristles. 



Fig. 3. — PSEtJDODBXIA BJQUES WIEDEMANN 



The head is almost circular when viewed from in front and the 

 antennsB attached slightly below the level of the middle of the eye, 

 the third joint slender, over three times the second; arista rather 

 short-plumose almost to its tip. Front golden pollinose almost to 

 the antennae, at narrowest hardly wider than ocellar triangle, the 

 frontal bristles beginning at the narrowest place and barely reaching 

 the base of the antennae; parafacials narrow, silvery; vibrissae at 

 margin of mouth, a few small bristles extending up almost halfway 

 on the facial ridges ; face rather flat and considerably receding ; palpi 

 normal, yellow; proboscis small, fleshy. 



Thoracic chaetotaxy so badly damaged that it can not be made 

 out. Hind calypters very large, postscutellum and hypopleurals 

 present. Legs black; middle tibia with two bristles on the outer 

 front side; hind tibia with a partial row of quite small bristles on 

 the outer hind side, one below the middle a little larger, standing 

 directly opposite to one of equal size on the inner hind side. Claws 

 and pulvilli elongate. 



