Crane-flies 5 c 



FEMALE. Length, 5-5 mm.; wing, 6-8 mm. 



Rostrum and palpi black. Antennae black, the basal flagellar segments 

 enlarged, beyond the fifth oval, the last segment elongate. Head dark-coloured, 

 discoloured in the type. 



Thorax dark-coloured, discoloured in the type, probably grey pniiiioM-; 

 pleura grey pruinose. Halteres short, pale at the base, tin- remainder brown. 

 Legs with the coxa3 and trochanters yellow; femora dull yellow, the tips broadly 

 brown, narrowest on the fore femora, broader on the posterior femora: tibia- 

 and tarsi very light brown, the terminal segments of the latter darkened. \Ying> 

 nearly hyaline; stigma large, oval, brown; veins brown; venation ilM. I. iiu. I 

 c 2 'remote from the tip of Sc L so that 8c\ alone is about equal to tin- ba-al 

 deflexion of GUI; Sci ends just opposite the origin of Its ; r at the tip of 7^; 

 Rs about twice as long as the basal deflexion of #4+5; cell first M z closed; basal 

 deflexion of Cu\ at the fork of M. 



Abdomen dark brown, pruinose, the pleural integument and the valves of 

 the ovipositor yellowish. 



Locality: Holotype, 9, Nome, Alaska, August 24, 25, 1916 (F. Johai. 

 No. 78. 



In the elongate Sci this species suggests D. halter ata Osten-Sacken, but 

 this is about the only feature that the two species have in common. In other 

 respects it seems closer to D. aquita Dietz 1 from Taltson river, Mackenzie dis- 

 trict (not Rocker river as stated in the original description), but it is a much 

 smaller fly and the details of both colour 'and venation are different. 



Tribe ERIOPTERINI. 



Genus Erioptera Meigen. 

 Subgenus Erioptera Meigen. 

 Erioptera Meigen; Illiger's Magazine, vol. 2, p. 262; 1803. 



Erioptera (Erioptera) angustipennis, n. sp. 



General colouration dark brown with a grey pruinosity; wings very long 

 and narrow. 



MALE. Length, 4-4 mm.; wing, 5-4 mm. 



Rostrum and palpi black. Antennae black, the flagellar segments oval. 

 Head dark grey. 



Mesonotum brown, more greyish on the sides; pseudosutural fovese con- 

 spicuous, transverse, black. Pleura dull grey. Halteres rather elongate, brown. 

 Legs dark brownish black throughout. Wings very long and narrow showing 

 the first stages of atrophy although the venation is normal; membrane slightly 

 suffused with brown; stigma indistinct; veins dark brown; venation (PI. I, fig. 2) 

 the veins are all very elongated due to the great narrowing of the wing. 



Abdomen dull grey, the segments indistinctly paler caudally and here 

 with fringes of long golden hairs that are more sparse elsewhere on the surface; 

 male hypopygium with the pleural appendages slender, pointed at their tips. 



Locality: Holotype, <?, Bernard harbour, Dolphin and Union strait, North- 

 west Territories, August 1-7, 1915 (F. Johansen). No. 1045. 



Readily distinguished from all other members of the genus by the long, 

 narrow wings. The second anal vein is straight as in the subgenus Acyphona 

 to which group the species may perhaps be better referred. 



i Canadian Entomologist, vol. 47, pp. 331-332, fig., October, 1915. 



