A medium-sized greyish black species with an oblong black 

 frontal callus which has a linear extension, five faint grey stripes on 

 the thorax, three series of yellowish grey spots on the abdomen, and the 

 first posterior cell of the wings closed with a rather long petiole. 



Female. Head a little broader than the thorax, short, and 

 moderately arched. Frontal stripe pale yellowish brown or yellowish 

 grey, paler on the upper part but rather distinctly darker at the vertex, 

 contracting from the vertex to the front eye-angles but in a species 

 from Taihoku took by Mr. T. Sugimoto parallel-sided and rather 

 broad, and about four and a half or five times as long as its broadest 

 part or wholly seven times as long as its narrowest part ; pubescence 

 on the frontal stripe mainly black with a very few scattered inconspicu- 

 ous yellowish hairs intermixed on the lower part, the black pubescence 

 being suberect on the mostly part but irregularity curved on about 

 the middle part where is seems as if it bears rather dense black pubes- 

 cence, on the vertex more numerous and rather depressed but at its 

 sides rather erect ; frontal callus long and slender, not reaching the 

 eye-margine and separated from the frontal triangle by a narrow 

 straight transverse greyish stripe, gradually but slightly narrowed at 

 the top where it has a long (about one and a half times as long as 

 the callus proper) linear extension, blackish and shining but usually 

 reddish about the lower extremity, very slightly convex throughout 

 the whole length, with an irregular inconspicuous longitudinal fine 

 sulcus which does not extend up to the linear extension. Frontal 

 triangle broader than the length, covered with pale yellowish ashy-grey 

 tomentum, flat but very slightly raised just above the antennal fossae, 

 with a distinct but very fine longitudinal sulcus which is not some- 

 times extending up to the upper margin where there is an inconspicuous 

 transverse furrow, the lateral ends of this furrow sometimes being 

 brownish, the surface being irregularity sculptured by the oblique or 

 transverse depressions. Face ashy grey with very slight pale yellowish 

 tinge on the upper part, covered with very short and fine whitish 



