GO DIPTERA OF NORTH AMERICA. [PART II. 



when it is seen from above or below. The first joint of the hind 

 tarsi with only two thorn-like bristles. Cilia of the tegulae black. 

 Wings grayish-hyaline ; the last segment of the fourth longitudinal 

 vein is inflected before its middle but not broken. The wings of 

 the J* are somewhat narrower than those of the 9, and have be- 

 fore the anal angle a very remarkable large bisinuated excision, 

 so that the angle assumes the shape of an independent lobe-like 

 appendage. Lamella? of the hypopygium of moderate size, 

 rounded-ovate, whitish, with a rather broad black border, on the 

 upper and apical margin jagged and fringed with black bristles. 

 Hub. Sitka. (Sahlberg.) 



29. D. plumipes Scop. % and ¥• — Viridis, humeris coircoldribus, 



antennis rufis, articulo tertio praeter basim nigro, facie aurea, ciliis ocu- 

 lorum inferioribus flavis, tegularuni ciliis nigris, pedibus flavis, articulo 

 tarsorum intermedioruni primo maris setulis nigris pennato, alarum 

 vena longitudinali quarta non fracta. 



Green, including the humeral callosity ; third joint of the red antennas 

 with the exception of its basis, black ; face golden-yellow ; cilia of the 

 inferior orbit yellow ; cilia of the tegulae black ; feet yellow ; first joint 

 of the middle tarsi of the £ feathered with black bristles ; fourth lon- 

 gitudinal vein not broken. Long. corp. 0.17—0.16. Long. al. 0.18. 



Syn. Musca plumipes Scopoli, Ent. Carn. 334, 895. 



Dolichopus pennitarsis, Fallen, Dolich. 11, 16. — Meigen, Zweifl. IV, 



90, 29.— Macquart, Suites, I, 4-46, 34.— Stannius, Isis, 1831, 63, 14. 



Zetterstedt, Ins. Lapp., 709, 9. — Staeger, Kroyer's Tidsskr. 30, 



21. — Zetterstedt, Dipt. Scand. II, 541, 35. 

 Dolichopus plumipes Walker, Dipt. Brit. I, 162, 16. 



Metallic-green, sometimes somewhat coppery. Antennae yel- 

 lowish-red, third joint, excepting its basis, blackened ; that of the 

 J* ovate, with a rather sharp angle at the end ; that of the 9 

 shorter. Front metallic-green. The face reaches lower here than 

 in most other species of Dolichopus ; that of the £ is rather nar- 

 row and golden-yellowish ; that of the 9 is broad and pale-gray- 

 ish, dusted with whitish-yellow. Palpi yellow. Cilia of the in- 

 ferior orbit yellow. Fore coxae yellow, with a black pubescence 

 anteriorly ; middle and hind coxae blackish, the extreme tip and 

 the trochanter yellow. Feet yellow. Hind femora with a bristle 

 before the tip. The middle tibiae are but slightly infuscated near 

 the tip ; the tip of the hind tibiae is somewhat blackish, this color 

 occupying but a narrow extent. Fore and hind tibiae plain in 



