186 INSECUTOR INSCITI^ MENSTRUUS 



Rostrum and palpi brown. Antennae short, pale brown. 

 Head dark brown, sparsely dusted with gray, more conspicuous 

 adjoining the margins of the eyes; vertical tubercle low. 



Mesonotum black, very sparsely pollinose, the scutellum and 

 postnotum with an appressed microscopic pubescence. Pleura 

 dark brown with a sparse microscopic pubescence. Halteres 

 brown, the knobs darker. Legs with the coxae concolorous with 

 the pleura ; remainder of the legs dark brown, the femora 

 slightly paler at base. Wings with a strong blackish sufifusion ; 

 veins dark brown. Venation : Sc long, Sc^ ending opposite the 

 fork of Rs, Sc^ a little more than its length from the tip of 

 Sc^ ; r on i?2 ^t or just beyond the base, sometimes atrophied ; 

 i?2+3 about two-thirds the length of Ro ; basal deflection of 

 Cmi at the fork of M. 



Abdomen brownish black. 



Holotype, male, Gifu, September 5, 1921 (K. Takeuchi). 



AUotopotype, female. 



Paratopotype, male. 



Tricyphona confluens, new species. 



Female. — Length, 19 mm.; wing, 16.5 mm. 



Rostrum and palpi dark brown. Antennae with the scape 

 and first flagellar segment obscure yellow, the remainder of 

 the flagellum brown ; fourteen flagellar segments, the basal 

 ones crowded. Head black, dusted with gray. 



Mesonotal praescutum obscure yellow with a very broad and 

 conspicuous median brown stripe and much less conspicuous 

 lateral stripes ; scutum yellow, the lobes conspicuously darkened ; 

 median area of scutum at suture and posteriorly with narrow, 

 darker brown marks ; scutellum and postnotum pale brown, 

 sparsely dusted. Plevtra pale tawny, the sternites slightly in- 

 fuscated. Halteres elongate, yellow. Legs with the coxae and 

 trochanters yellow ; femora dark brown, the bases narrowly but 

 conspicuously yellow ; tibiae pale brown, the tips darkened ; 

 tarsi dark brown. Wings with a strong yellowish tinge, cells 

 C and Sc more saturated ; stigma large, yellow, faintly out- 

 lined with brown ; narrow brown seams at Sc^, origin of Rs 



