Crane-flies 



Female. — Length, 5-5 mm.; wing, 6*8 mm. 



Rostrum and palpi black. Antenna' black, the basal flagellar segmerj 

 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 pruinoE 

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

 Legs with the coxae 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. Wingfi 

 nearly hyaline; stigma large, oval, brown; veins brown; venation (PI. I, fig. I 

 Sc 2 remote from the tip of Sci so that Sci alone is about equal to the basal 

 deflexion of Ctq; Sci ends just opposite the origin of Rs ; r at the tip ot R x ; 

 Rs about twice as long as the basal deflexion of /^.,+ 5 ; cell first M% closed; basal 

 deflexion of Cui 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. Johansen). 

 No. 78. 



In the elongate Sc\ this species suggests D. halterata 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; ISO".. 



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. Antennse 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 1- normal: membrane Blightly 

 suffused with brown; stigma indistinct; veins dark brown: venation (PI. 1. fig. 2 

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



Abdomen dull grey, the segment s 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 up-. 



Locality:" Holotype, <?, Bernard harbour. Dolphin ami Union -trait. North- 

 west Territories, August 1 7. L915 (F. Johansen). No. 1045. 



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

 narrow wings. The second anal vein is straighl as in the subgenus A cyph< 

 to which group the species may perhaps be better referred. 



« Canadian Entomologist, vol. 17. pp, 33] -332, fig.. October, 1915 



