292 THE CANADIAN ENTOMOLOGIST 



behind the pseudosuture, broaden out behind and fuse with the 

 median stripe near the transverse suture; scutum, lobes brown, 

 median Hne paler; scutellum lighter colored, yellowish medially, 

 brown on the sides; postnotum brown. Pleurae brown except 

 dorsally, where there is a pale band running from the pronotum 

 back to the wing basis. Halteres light yellow. Legs: coxae and 

 trochanters pale yellow, femora short, incrassated beyond the base, 

 brown, paler basally; tibiae and tarsi brown. Wings slightly tinged 

 with yellowish-grey; veins yellow. Venation (see fig. 11, plate III). 



Abdomen, tergites dark brown; sternites rather lighter brown, 

 extreme apices of the sclerites pale. Hypopygium (see figs. 3 and 4, 

 plate X) ; 9th tergite and sternite completely fused so that no pleural 

 suture remains; viewed from beneath, the 9th sternite projects 

 backward, its caudal margin rather squarely truncated; the outer 

 ventral pleural arm is straight, fleshy, rather thickly covered with 

 long hairs; just entad of the outer arm and nearer to the base of the 

 pleurite, arises the inner ventral pleural arm, which is elongate, 

 slender, its tip strongly chitinized and denticulated at the extreme 

 end and bent inward; the guard of the penis is a pointed, chitinized 

 organ, nearly as long as the outer pleural arm. Viewed from the 

 side, outer ventral arm of the pleurite directed caudad ; inner ven- 

 tral arm with the tips conspicuously arcuated and bent ventrad; 

 just above the base of the inner arm arises the dorsal pleural ap- 

 pendage, very broad at the base, its tip chitinized and directed 

 slightly dorsad, on the dorsum of the pleurite are two protuber- 

 ences clothed with long hairs. Viewed from above, the pleurites 

 are very broad, 'so that the space between them on the median line 

 is narrow; about midway of their length, on the inner face, is a 

 strong protuberance, directed inward; it is strongly chitinized and 

 almost touches its mate of the opposite side. 



Female. — Similar, but larger ; the abdomen is dark brown . the 

 genital segment much brighter, yellowish-brown. 

 Vial No. 19.— Tokio, Japan; June 25, 1912; 1 9 . 

 Vial No. 20.— Tokio, Japan; June 25, 1912; 1 9 . 

 Vial No. K.— Tokio, Japan; Aug. 1912; 1 cf • 

 Holotype.— 1 c^, Vial K. 

 Allotype.— 1 9 , Vial 20. 

 Paratype. — 1 9 Vial 19. 



