268 DIPTERA OF NORTH AMERICA. [PART II. 



b. In the male all the tibiae, in the female also all femora yellow. 



11. P. scoMn&tor Loew. % and 9. — Parvus, nitidissimus, viridis 

 vel ex viridi chalybeus, facie pilosa, alis immaculatis, anteriore venae 

 longitudinalis quartae ramulo arcuatim ducto, halteribus flavis. 



% . Abdomine fasciis nigris angustis ornato et in apice pilis solito paulo 

 longioribus vestito, femoribus nigris, viridimicantibus, summo femorum 

 anteriorum apice tibiisque omnibus flavis, tibiarum posticarum. apice 

 tarsisque omnibus ex fusco nigris, prirao tamen tarsorurn anticorum 

 articulo flavo, calcare tibiarum intermediarum longissimo, primo tarso- 

 rurn intermediorum articulo setulis incurvis scabro. 



9 • Fasciis abdominalibus nigris nullis, coxis anticis, femoribus tibiisque 

 omnibus flavis, extremo tibiarum posticarum apic'e tarsisque omnibus 

 ex fusco nigris, basi tamen tarsorurn anteriorum flava. 



Small, very shining, green or greenish-blue ; face hairy ; wings without 

 picture, the anterior branch of the fourth longitudinal vein arch-like ; 

 halteres yellow. 



% . Abdomen with narrow black bands, at the tip with a somewhat shorter 

 pubescence than usual ; femora black, with a green lustre, the extreme 

 tip of the four anterior femora and all tibiae yellow, the tip of the hind 

 tibiae and all tarsi brownish-black, still the first joint of the fore tarsi 

 yellow, the spur of the middle tibiae extremely long ; the first joint of 

 the middle tarsi rasp-like, being beset with crooked bristles. 



9. Abdomen without black bands; fore coxae, all femora and all tibiae 

 yellow ; the extreme tip of the hind tibiae and all tarsi brownish-black* 

 still the basis of the fore and middle tarsi yellow. Long. corp. 0.15— 

 0.16. Long. al. 0.15.— 0.16. 



Syn, Psilopus scobinator Loew, Neue Beitr. VIII, 91, 9. 



Male. Handsome shining, green, sometimes partly steel-blue. 

 Palpi black ; proboscis brownish-yellow. Face with a long whitish 

 pubescence and not very closely dusted with white. The second 

 joint of the antennae with moderately long bristles ; the arista 

 itself only of the usual length. The delicate scattered pubescence 

 of the front generally yellowish, more seldom whitish ; the usual 

 black bristles upon the ocellar tubercle and in the upper eye- 

 corner rather long. The bristles upon thorax and scutellum are 

 also rather long. The hind part of the abdomen is more pointed 

 in the shape of a cone than in most of the other species ; the black 

 bands at the basis of the segments of the abdomen are narrow, 

 broader only upon the segments. The short pubescence of the 

 abdomen is black; upon the first segment, as als*o on the anterior 

 part of the lateral margin and on the greater part of the venter it is, 



