288 THE CANADIAN ENTOMOLOGIST, 



1. 9th tcrgite broad and thin, at its apex deeply notched; two 



chitinized teeth at the base of the pleura on the ventral 

 side 2. 



9th tergite provided with two chitinized hooks at its apex; no 

 chitinized teeth at the base of the pleura on the ventral side; 

 [horns of the second gonapophyses long, widely separated at 

 the base] (Japan) asymmetrica, sp. n. 



2. Base of pleura on sternal side provided with a chitinized plate 



which is bidentate, the proximal tooth free, the distal one 

 joined to the pleura; 2nd gonapophyses short, chitinized at 

 tip and on sides; apex merely notched. 

 (Europe) maculata Meigen. 



Base of pleura on sternal side provided with a small chitinized 

 tooth, minutely denticulate; 2nd gonapophyses long, the tips 

 long and widely separated (Japan) incongniens, sp. n. 



Erioptera {Acy phono) incongrnens, sp. n. 



Small species; light brown, with narrow dark brown pleural 

 stripes; wings thickly spotted with brown. 

 Male. — Length, 5 mm. 



Male. — Rostrum and palpi brown. Antennae long, segment 

 one brownish-yellow; segments two to eight light yellow; remainder 

 with increasing am.ounts of brown at their tips, the apical segments 

 all brownish. Frcnt, vertex and occiput dark brown. 



Thoracic pronotum brc'wnish-yellow, brown on the sides. 

 Praescutum reddish-brown, with a double median brown stripe; 

 humeral region brighter yellow; sides of the sclerite darkened; 

 scutum, scutellum and postnotum brown. Pleurae reddish-brown 

 with narrow dark-brown lines, the m.ost dorsal one continuing from 

 behind the fore coxa underneath the wing to the postnotum; the 

 second beginning on the mesosternum running above the middle 

 coxa, becoming very narrow and indistinct before the root of the 

 halter; the last stripe on the metasternum over the hind coxa. 

 Halteres light yellow. Legs: coxa .brown; trochanters brownish- 

 yellow. (The legs are all detached and loose in the vials; m.ost of 

 there have the femora largely brown, basal third mostly paler, 

 yellowish; a post n:edian yellow ring, tip usually pale; tibiae and 



