196 The Ohio Journal of Science [Vol. XX, No. 6, 



Erioptera katmai is closely related to E. a?tgustipennis 

 Alexander (North-western Canada), from which it is readily told 

 by the almost normal wings. Both of these species, as well as 

 the forms belonging to the microcellula group, deviate from the 

 characters of the subgenus Erioptera in the straight 2nd Anal 

 vein. 



Genus Ormosia Rondani. 



Ormosia subnubila, sp. n. 



Related to O. nubila Osten Sacken; patches of dark hairs on the 

 wings not forming transverse clouds; cell 1st M2 broader, strongly 

 widened distally. 



Female. — Length 6 mm.; wing, 8.2 mm. 



Rostrum and palpi brownish black. Antennas black, the flagellar 

 segments oval, the distal segments more elongated. Head gray. 



Thorax dark brown, dusted with brownish gray, the pronotal 

 scutellum 3'ellowish on the sides. Pleura gray pruinose with sparse 

 yellowish hairs arranged in patches; mesostemum with yellowish hairs. 

 Haltees light yellow, the extreme base of the stem darkened. Legs with 

 the coxag and trochanters gray pruinose, provided with conspicuous yel- 

 low hairs; remainder of the legs dark brown. Wings broad, grayish 

 ■subhyaline, with faint dark clouds along the cord and some of the 

 longitudinal veins beyond the cord; stigma conspicuous, dark brown; 

 veins dark brown ; a more nearly hyaline area before the stigma cephalad 

 of the end of the sector. Venation: Sc2 a little before midlength of the 

 distance between the origin of Rs and the end of Sci; cell 1st M2 closed, 

 much broader than in 0. nubila, strongly widened distally; m and 

 the outer deflection of Ms subequal; Anal veins convergent. 



Abdomen black, sparsely pruinose and with appressed yellowish 

 hairs. Ovipositor with the tergal valves horn-colored but very dark at 

 the base, the valves strongly upcurved to the acute tips; sternal valves 

 much shorter, straight, the tips subacute. • 



Habitat. — Alaska. 



Holotype, 9 , Savonoski, Naknek Lake, July, 1919 (Jas. 

 S. Hine). 



Genus Helobia St. Fargeau et Serville. 



Helobia hybrida (Meigen). 



1804 Limonia hybrida Meigen; Klass. Beschr. Eur. Zweifl. Ins., p. 57. 



A few males and females from Savonoski, Naknek Lake, 

 June, 1919. 



