CHARLES P. ALEXANDER 25 



yellow; a faint brown spot adjoining the inner margin of the ej^es behind 

 the antennal bases; occipital area small, brown, faintly shiny. 



Pronotum yellow, the lateral portions only slightly darker. Mesonotal 

 praescutum yellow with three shiny black stripes; laterad of the anterior 

 ends of the lateral stripes a faint isolated opaque black spot; scutum with the 

 lobes reddish black, the median area sulphur yellow; scutellum and post- 

 notum mostly sulphur yellow, the latter with a pair of large rounded black 

 spots along the caudal margin. Pleura yellow, the mesosternum between 

 the fore and middle and middle and hind coxae and a spot before the halteres 

 reddish brown or blackish. Halteres light brown, the ends of the knobs 

 sulphur j^ellow. Legs with the coxae and trochanters orange-3'ellow ; femora 

 reddish yellow, the tips indistinctly darker on the outer face; tibiae brownish 

 yellow, the tips darkened; tarsi dark browTi. Wings with a pale brow-nish 

 j-ellow tinge, the costal and subcostal cells and the stigma a little more strongly 

 yellow; veins dark brown. Venation: cell Mi narrowly sessile; basal de- 

 flection of Cih at the fork of M. 



Abdomen reddish yellow, the tergites trivittate with black, the stripes 

 very narrow, interrupted at the bases of the segments; segments of the ab- 

 domen clothed with conspicuous yellow hairs. Male hj^^opj'gium with the 

 ninth tergite nearly as in N. repanda, outer pleural lobes convex, scoop-like, 

 the tips broadly rounded. Ovipositor with the tergal valves straight, slender. 



Habitat. — Japan. Holotype, d' , Ichikawa, Chiba-ken, May 17, 

 1919, (R. Takahashi). Allotopotype, 9. 



N ephrotoma xjeminata is closely related to N. /ja^/om (Coquillett), 

 but differs considerably from this latter species in the details 

 of structure and coloration. 



Nephrotoma bifusca new species 



Antennae with the basal segments pale; mesonotum j'ellow, the prae- 

 scutum with three broad black stripes; scutellum and postnotum yellow, 

 blackish laterally; pleura dull yellow, the mesosternum browTiish black; 

 wings ])ale yellow, with a brown band at the cord and the tip largely brown; 

 abdominal tergites trivittate with black. 



Female. — Length, about 18 mm.; wing, 13.2 mm. 



Frontal prolongation of the head dull yellow, the dorsum shiny brown; 

 nasus slender; palpi brown, the two intermediate segments dull yellow. An- 

 tennae with the basal segments dull yellow, on the fifth and succeeding seg- 

 ments with the basal enlargement brown producing an indistinct bicolorous 

 effect. Head orange-yellow, the shiny occipital area small and pale brown. 



Pronotum dull yellow. Mesonotal praescutum yellow with three very 

 broad black stripes, the interspaces very narrow; an oval velvety black spot 

 laterad of the anterior ends of the lateral stripes; ends of the suture velvety 

 black; scutum black with orly the narrow median area yellow; scutellum 

 dull yellow, brownish black laterally; postnotum yellow medially, the lateral 

 and posterior portions broadly black. Pleura dull yellow, the mesosternum 



TRAXS. A.M. EXT. SOC, XLVI. 



