38 DIPTERA OP NORTH AMERICA. [PART II. 



the length of the tibiae; their three first joints are style-like, 

 very attenuated, generally brownish-yellow ; their two last joints 

 are black, flattened from the side, the penultimate but little, the 

 last joint on the contrary very much enlarged. The fore tarsi of 

 the 9 are plain, blackish from the tip of the first joint. Middle 

 tarsi of both sexes plain, black from the tip of the first joint ; upon 

 the second half of the upper side of their first joint a single stronger 

 bristle is inserted. Hind tarsi always altogether black. Cilia of 

 the tegulse black. Wings of the g somewhat less grayish than 

 those of the 9 , proportionally somewhat shorter and more pointed, 

 with a strong swelling of the costa near the tip of the first longi- 

 tudinal vein. The hind transverse vein almost perpendicular ; 

 the last portion of the fourth longitudinal vein not broken. 



Hob. Fort Resolution, Hudson's Bay Territory. (Kennicott) 

 Observation. The identity of Mr. Kennicott's specimens with 

 the European D. brevipennis may be considered as doubtless, 

 after the most careful comparison. 



B. Cilia of the inferior orbit pale. 



A. Cilia of the tegulse pale. 

 1. Antennae black, at the utmost the larger portion of the first joint red. 



11. D. longimamilS LOEW. and f . Aeneo-viridis, facie rnaris 

 pallide ochracea, fceminse ex flavo cinerascente, antennis nigris, ciliis 

 oculorum inferioribus tegtilarumque ciliis flavicantibus, coxarum anti- 

 carum dimidio basali obscuro, pedibus flavis, tarsi's posticis totis nigris ; 

 maris ultimo tarsor-um anticomm articulo valde dilatato feinoribnsque 

 posticis ciliatis. 



Metallic green; the face of the pale ochre-yellowish, that of the 9 yel- 

 lowish-gray ; antennse black ; cilia of the inferior orbit and of the tegulse 

 yellowish ; basal half of the fore coxae dark ; feet yellow with entirely 

 black hind tarsi, last joints of the fore tarsi enlarged and hind 

 femora ciliated. Long. corp. 0.26 0.27. Long. al. 0.27 0.28. 



SYN. Dolichopus longimanus LOEW, Neue Beitr. VIII, 14, 7. 



Bronze-green, rather bright. Face of the J* narrow, pale 

 ochre-yellow; face of the 9 rather broad, light yellow-grayish. 

 AntennaB entirely black, lower corner of the third joint with a 

 scarcely perceptible lighter coloring; third joint of the antennas 

 in the short ovate, in the 9 almost round. Front bright, 

 green or blue-green. The cilia of the inferior orbit yellow. 



