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



Limnophila aleutica, sp. n. 



General coloration dark brown, sparsely pruinose; legs dark brown, 

 the femoral bases yellow; wings yellow, Rs long, about equal to R2, r 

 at the tip of Ri; cell Mi present. 



Male. — Length, 10.5 mm.; wing, 10 mm. 



Rostrum dark browTi; palpi black. Antennae short; first scapal 

 segment black, sparsely pruinose; basal segments of the flagelliun 

 brown, rather enlarged, oval, the distal segments darker and more 

 elongated. Head greyish brown. 



Thorax dark brown, shiny, sparsely brownish pollinose, the post- 

 notum with a gray pruinosity. Pleura gray. Halteres rather long, pale, 

 the knobs brown. Legs with the coxae yellow, the fore and middle coxae 

 brownish basally; trochanters pale; femora dark brown, the bases 

 narrowly yellowish, broadest on the posterior femora, narrowest on the 

 fore femora; tibiae pale brown, passing into dark brown at the tips; 

 tarsi dark brown. Wings with a strong yellowish tinge, the subcostal 

 cell even more saturated; stigma conspicuous, dark browm; a faint 

 brown cloud at the end of Rs; veins dark brown. Venation: Rs long 

 strongly arcuated to slightly angulated at origin, subequal to R2; R2+3 

 but little longer than the basal deflection of R4+5; r at the tip of Ri and 

 on R2 at about two-fifths its length; cell Mi longer than its petiole; 

 basal deflection of Cui at or slightly before midlength of cell 1st M2. 



Abdomen dark brown, sparsely yellowish pollinose. Male hypo- 

 pygium rather large and conspicuous; ninth tergite produced medially 

 into a rather large, tumid, subquadrate lobe that is gently concave 

 apically; pleurites short and stout; outer pleiu-al appendage slender, 

 ■chitinized, expanded distally into a flattened blade; inner appendage 

 bent strongly cephalad a short distance beyond the base. 



Habitat. — Alaska. 



Holotype, d^, Katmai, June 10, 1919 (Jas. S. Hine). 



Paratopotypes, 3 d^'s. 



Limnophila aleutica may be placed temporarily in the sub- 

 genus Phylidorea Bigot which includes L. ferrugmea, L. adust a 

 and others. In this group it approaches most nearly L. similis, 

 L. terrce-novcB and other dark colored species from which it is 

 readily told by the elongate radial sector. 



Tribe Pediciini. 



Genus Tricyphona Zetterstedt. 



Tricyphona frigida Alexander. 



1919 Tricyphona frigida Alexander; Rept. Canadian Arctic Exped., 1913-18. 

 Vol. 3C, pp. 7c, 8c. 



This species was taken at Katmai, June 10, 1919. 



