CHARLES P. ALEXANDER 23 



Nephrotoma virgata is apparently the commonest species of 

 the genus in Japan. Specimens are before me from the following 

 unrecorded stations: 



Kioto, May 31 to July, (Akio Nohira). 



:\reguro, Tokio, x\pril 24 to May 2, 1919, (R. Takahashi). 



Saitama, May 29, 1919, (R. Takahashi). 



Nephrotoma contrasta new species 



General coloration yellow, the occiput with a large black spot; mesonotal 

 praescutum with three black stripes; scutal lobes black; scutellum and post- 

 notum mostly yellow; pleura heavily marked \\ith black; wings yellow, a 

 grayish brown seam at the end of Rs and another at the wing-tip; abdominal 

 tergites trivittate with black. 



Male. — Length, about 11 mm.; wing, 13.2 mm. 



Female. — Length, 16.5 mm.; wing, 15.8 mm. 



Frontal prolongation of the head yellow, the dorsum black; palpi pale 

 brown, the terminal segments darker. Antennae with the first segment 

 short, reddish brown; second segment dark brown; flagellum brownish black 

 throughout, the segments rather deeply incised beyond the basal swelling. 

 Front light yellow with a small brownish median spot ; vertex orange-yellow, 

 a small dark brown spot adjoining the inner margin of the eye; occiput with 

 a very large rounded black mark which passes caudad to the cervical sclerites 

 and ventrad upon the genae. 



Pronotum light yellow, the sides broadly black. Mesonotal praescutum 

 yellow with three black stripes, at the anterior end of the lateral stripes with 

 an opaque velvety-black spot; suture black, this mark extended cephalad 

 along the lateral margin of the praescutum, reaching to almost opposite 

 the anterior end of the lateral stripes; scutum yellow, the lobes very exten- 

 sively black; scutellum yellowish testaceous; postnotum yellow, the caudal 

 margin with a pair of rounded black spots. Pleura yellow, heavily spotted 

 with black, the largest marks on the mesosterna and meso pleura. Halteres 

 brown, the knobs yellow. Legs with the fore coxae largely blackish on the 

 outer face, the other coxae pale with a large basal black mark; trochanters 

 dull yellow; femora brownish yellow, the tips indistinctly darker; in the 

 female the femoral tips are broadly black, especially those of the fore legs 

 where only the base of the segment is pale; tibiae pale brown, the tips broadly 

 blackened; tarsi black. Wings with a strong yellowish tinge, the costal and 

 subcostal cells yellow, the anal cells more grayish; stigma oval, dark brown; 

 wing-tip and a cloud on the basal deflection of i?4+6 and r-m grayish brown; 

 veins dark brown. Venation: petiole of cell il/i short or punctiform. 



Abdominal tergites dull yellow with a broad black median stripe, on seg- 

 ments seven to nine suffusing the entire sclerites; sternites dull yellow. In the 

 female, the dorsal median stripe is very broad and the lateral margins are 

 distinctly blackish; sternites yellow with a dark brown median line, begin- 

 ning on the second sternite as a capillary line which widens out behind, on 

 the fifth and succeeding sclerites including most of the sternites. Hypopygium 



TR.\NS. AM. ENT. SOC, XLVI. 



