4 ARKIV FÖR ZOOLOGI. BAND 13. NIO 6. 



preserved and further determination is impossible. Trimicra 

 reciproca (Walk.) is known from Uruguay and northern 

 Argentina and T. andensis Alex. from Ecuador and Peru. 



Tribe Limnophilini. 



Genus Limnophila Macquart. 



Subgenus Austrolimnophila, subg. n. 



Antennae elongate, 16-segmented; in the male sex, the 

 first segment moderately elongated, the second cyathiform; 

 flagellar segments elongate-cylindrical, gradually decreasing 

 in length from the basal to the outermost, the last segment 

 subequal to the penultimate, slightly enlarged distally; fla- 

 gellar segments clothed with an abundant erect, påle pube- 

 scence of moderate length, the intermediate segments with a 

 few verticils just before midlength. Thorax moderately high; 

 tuberculate pits lacking. Hal teres elongate, the clubs rather 

 large. Legs long and slender, the tibiae with long spurs; 

 claws small, simple. Wings with vein Se long, ending beyond 

 the fork of Rz+s, Sc2 at the extreme tip of Sci and longer 

 than it; Rs long, square at its origin, the angle spurred; 

 R2+3 short, about one-half longer than the basal deflection 

 of Cui; r about twiee its length removed from the tip of Ri; 

 cells R3, R5 and 1st M2 in alignment; cell 1st Mz long and 

 narrow, the basal deflection of Cui just beyond the middle 

 of its length; petiole of cell Mi very short, less than?n. Ab- 

 domen long and slender. Male hypopygium with the pleurites 

 stout, narrowed at the outer end, at the tip with two pleu- 

 ral appendages; outer appendage almost straight, the outer 

 face with numerous bairs, the tip suddenly narrowed into a 

 blackened apical spine; inner appendage bent at a right 

 angle near the base, at the bend provided with a few erect 

 hairs, the apex unchitinized, provided with a few tiny setae. 

 Gonapophyses in the form of chitinized horns whose acute 

 tips slightly diverge. 



Type of the subgenus. — Limnophila eutaeniata Bigot 

 (Tierra del Fuego). 



This new group is close to the subgenus Limnophilella 

 Alexander (Panama to Brazil) from which is most readily 



