272 DIPTERA OF NORTH AMERICA. [PART II. 



13. P. calcaratias Loew. %. — Parvus, nitidissimus, viridis vel ex 

 viridi chalybeus, facie pilosa, alis immaculatis, anteriore venae longitu- 

 dinalis quartae raniulo arcuatim ducto, halteribus flavis. 



% . Abdomine fasciis nigris angustis ornato, femoribus nigris, viridi- 

 micantibus, summo femorum anteriorum apice tibiisque omnibus flavis, 

 tibiarum posticarum apice tarsisque omnibus ex fusco nigris, primo 

 tamen tarsorum anticorum articulo flavo, calcare tibiarum intermedia- 

 rum longissimo, primo tarsorum intermediorum articulo simplici. 



9 



Small, very sbining, green or greenisb-blue ; face hairy ; wings without 

 picture, the anterior branch of the fourth longitudinal vein arched ; 

 halteres yellow. 



% . Abdomen with narrow black bands ; femora black, with a greenish 

 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 plain. 



£> Long. corp. 0.15. Long, al, 0.15. 



Syn. Psilopus calcaratus Loew, Neue Beitr. VIII, 93, 10. 



I am unable to mention any difference from the male of the 

 P. scobinator, except that the middle tarsi are somewhat longer, 

 namely, as long as the tibiae, and that their first joint upon the 

 under side is not fringed rasp-like, with numerous, crooked bristles, 

 but has only a few scattered straight bristles. 



Hab. Carolina. (Zimmermann.) 



14. P. internals Loew. % . — 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 longiori- 

 bus nullis vestito, femoribus nigris, viridi-micantibus, summo femorum 

 anteriorum apice tibiisque omnibus flavis, apice tibiarum posticarum 

 extremo tarsisque omnibus ex fusco nigris, tarsorum anteriorum basi 

 tamen flava, calcare tibiarum intermediarum brevissimo, primo tarsorum 

 intermediorum articulo simplici. 



9 



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

 picture, the anterior branch of the fourth longitudinal vein arched ; 

 halteres yellow. 

 $ . Abdomen with narrow black bands, at the tip without hairs longer 

 than usual ; femora black, with greenish lustre, the extreme tip of the 

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

 t tibiae and all tarsi brownish-black, still the basis of the fore and middle 



