340 DIPTERA OF NORTH AMERICA. [PART II. 



Genl XX. PORPHIROPS. 



.5. P. longipes Loew. % . — Viridis, facie alba, coxis ex viridi nigris, 

 pedibus anterioribus flavis, ultimis tarsorum articulis nigris, pedibus 

 posticis nigris, femorum basi tibiisque supra (basi tamen excepta) 

 testaceis, apice barum tarsisque fuscis, exterioribus bypopygii appen- 

 dicibus filiformibus, bipartitis. 



Green ; face wbite ; cox^e black-green ; tbe four anterior feet yellow, the 

 last joints of tbe tarsi black ; tbe basis of tbe femora and tbe upper side 

 of tbe tibiae, witb tbe exception of tbe tip, brownisb-yellow, tbe tip of tbe 

 tibiae and tbe tarsi brown ; tbe exterior appendages of tbe bypopygium 

 linear, bipartite. 



Long. corp. 0.26. Long. al. 0.21. 



Syn. Porphyrops longipes Loew, Berl. Ent. Zeitscbr. VIII, 95, 92. 



Dark green, shining ; thorax with two narrow approximated 

 dark streaks. Front covered with white dust. Antennas black ; 

 the third joint lanceolate; the arista a little shorter than the 

 antennas. The narrow face white. The lower part of the occiput 

 clothed with dense yellowish hair. Abdomen above with black, 

 on the sides with yellowish-white hairs. The exterior appendages 

 of the hypopygium dusky yellowish, linear, bipartite, and beset 

 with delicate whitish hairs. Fore feet yellow ;-'the two last joints 

 of the tarsi black ; the tip of the preceding joint black-brown ; 

 the fore femora upon the latter part of the upper side, blackened ; 

 the tip of the first joint of the fore tarsi incrassated, almost denti- 

 form on the under side. Hind femora black with brownish-yellow 

 basis. Hind tibiae and hind tarsi comparatively stout ; the tibia? 

 black, on the upper side, with the exception of the tip, brownish- 

 yellow or yellow, the tip brown ; the tarsi brown, thejr tips black. 

 All the feet longer than in most of the other species of Porphyrops. 

 All the coxae greenish-black with a pale pubescence ; the middle 

 ones, at their tips, with black, approximated bristles, forming a 

 tuft, not unlike a thorn. Tegulaa yellowish, with whitish cilia. 

 "Wings tinged with brownish-gray and with blackish-brown veins ; 

 the end of the third longitudinal vein gently curved downwards : 

 the last segment of the fourth longitudinal vein inflected. 



Hab. White Mountains, New Hampshire. (Osten-Sacken.) 



