288 THE CANADIAN ENTOMOLOGIST. 



1. 9lh tergite bread and thin, at its apex deeply . notched ; two 



chitinized teeth at the base of the pleura on the ventral 



side • 2. 



9th tergite pn \ided with two chitinized hcoks 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 

 tl-,e base] (Japan) asymmetrica, sp. n. 



2. T^ase 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 en sides; apex merely notched. 



(Europe) maculata Meigen. 



Base of pleura on sternal side i^rcvided with a small chitinized 

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

 long ard wiilely separated (Japan) incongruens, sp. n. 



Erioplera (Acyphona) incongruens, sp. n. 



Small species; light brown, with narrow dark brown pleural 

 >tripes; wings thickly spotted with brown. 



Male. — Length, 5 mm. 



Male. — Rostrum and pah)! brown. .Antenna- long, segment 

 t r.c bn wnish-yel!< w; segments two tc eight light yellow; remainder 

 with increasing anc unts < f brown at their tips, the apical segments 

 all bn wnish. Front, vertex and occiput dark brown. 



Thoracic pronotum brownish-yellow, brown on tiie sides. 

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

 humeral region brighter yellow; sides of the sclerite darkened; 

 scutum, sculcllum and postnotum brown. Pleura? reddish-brown 

 with narrow dark-brown lines, the most dorsal one continuing from 

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

 second beginning on the mesosternum running abo\e the middle 

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

 halter; the last stripe on the meta.sternum ever the hind co.xa. 

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

 yellow. (The legs arc all detached and loose in the vials; most of 

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

 yellowish; a post n.odian \el!<w ring, tip u;.uall>- \\\\v. tibia- and 



