290 THE CANADIAN ENTOMOLOGIST 



tergite broad and long with a cross-shaped mark; near its tip set 

 with two small, semicircular, chitinized pieces which are produced 

 into sharp points on the proximal ends. Pleurites short and stout, 

 at the base on the dorsal side, produced into a long, slender, chiti- 

 nized arm which is directed entad, two apical appendages, the more 

 ventrad being chitinized, especially at the tips, the dorsal apical 

 appendage fleshy. Between the tergite and the unarmed sternite, 

 nearly in the median plate, is a rectangular, subchitinized organ, 

 bearing at its outer angles chitinized hooks, bent ventrad and in- 

 ward, these hooks minutely denticulated at tip. 



cf . — Length, 5.8 mm.; wing, 6.3 mm. 



9 . — Length, 6.4-7.1 mm. 



Holotype.— Vial 6, April 25, 1912; Tokio, Japan. 



Allotype.— Vial 6, April 25, 1912; Tokio, Japan. 



Paratypes.— Vial 6 and L; 4 9,2 d', April 25, 1912; Aug. 1912, 

 Tokio, Japan. 



Subgenus Erioptera, Meigen. 



Erioptera {Erioptera) elegantula, sp. n. 



Wings with brown spots. 



Male. — Length, 5.4 mm.; wing, 7.7-7.9 mm. 



Female. — Length, 6-6.5 mm.; wing, 7-8.3 mm. 



Male. — Rostrum and palpi dark brown, antennae with basal 

 segments brown, flagellar segments sV.ort, dark brown; front, ver- 

 tex and occiput dark brown. 



Pronotum dark brown above, lighter colored on the sides. Mes- 

 onotum dark brown, the region before the pseudosutural pits more 

 yellowish; scutum, scutellum and postnotum dark brown. Pleurae 

 dark brown. Halteres pale. Legs: coxae dark brown; trochanters 

 brown ; femora dark brown ; tibiae dark brown, a little paler at the ex- 

 treme base ; tarsi dark brown. Wings subhyaline with greyish-brown 

 marks, as follows :A large rounded spot at origin of Rs, a second at 

 Sc^, a third at end of Sc^ running down over cross- vein r; a fourth 

 spot at tip of R^ and a smaller one at tip of R-; cord broadly mar- 

 gined with the same color; less distinct clouds at ends of the other 

 veins and along most of these veins. Venation, (see fig. 3, plate IIL) 



Abdomen dark brown, densely clothed with long whitish hairs. 

 Hypopygium. 9th tergite broad at base, narrowed at the middle. 



