30 THE CANADIAN ENTOMOLOGIST 



Tribe Pedicini. 

 Genus Tricyphona Zctterstedt. 

 Tricyphona autumnalis, sp. n. 



Allied to T. calcar O. S. ; female with the wings semi-atrophied 

 and the valves of the ovipositor straight: male with the hypopygium 

 provided with conspicuous long hairs. 



Male. — Length 13.5-15 mm.; wing 13.5-14 mm. 



Female. — Length 20 mm.; wing 9.6 mm. 



Male. — Rostrum dull yellow, the palpi dark brown. An- 

 tennae with the scapal segments dull, brownish yellow, the five or 

 six basal segments of the flagellum yellowish, thence passing into 

 dark brown at the tip of the organ. Head light gray, indistinctly 

 darker medially, the frontal tubercle blackish ; vertex with long 

 yellowish hairs inserted in black punctures. 



Mesonotal praescutum yellowish with three indistinct, reddish 

 yellow stripes; scutellum and postnotum whitish yellow. Pleura 

 whitish yellow. Halteres yellow, the knobs brown. Legs with the 

 coxae and trochanters light yellow; femora yellow, passing into 

 brownish at the tips; tibiae yellow, narrowly dark brown at the 

 tips; tarsi dark brown. Wings yellowish subhyaline, the costal 

 region more saturate yellow; stigma brown; veins brown. Vena- 

 tion: vein R 4+5 forked, the petiole very short, subequal to the 

 r-m cross-vein. 



Abdominal tergites dark brown, a little paler caudally; basal 

 sternites yellowish, terminal sternites brown, the segments narrowly 

 ringed with paler on the caudal margins. Hypopygium with the 

 pleurites and appendages dark brown, densely long-hairy. 



Female. — Similar to the cf but the antennae shorter; wings 

 relatively very small, semi-atrophied; femora and tibiae with the 

 dark apices less distinct; valves of the ovipositor powerful, almost 

 straight. 



Habitat. — Northeastern United States and Eastern Canada. 



Holotype, cf, Woodworth's Lake, Fulton Co., New York; 

 altitude 1,600 feet ; September 2, 1916 (Alexander). 



Allotype, 9 , with the type. 



Paratopotypes, 25 cf 9 ; paratypes, cf , Meach Lake, Quebec, 

 Sept. 2, 1903 (J as. Fletcher); cf, Rostrevor, Quebec, Sept. 2, 1907 

 (A. Gibson); cf 9 , Katahdin, Piscataquis Co., Maine, Aug. 22, 



