m 



yellowish middle tibiae. ; 



Abdomen much broader, slightly longer than the head and 

 thorax (including the scutellum) together. Dorsum blackish and mo- 

 derately shining, with the large quadrate lateral orange yellow spots at 

 the base and a narrow orange yellow median stripe extended from the 

 posterior margin of the second segment to the fifth segment, as well 

 as two conspicuous small, round, reddish yellow spots on the third 

 segment ; the lateral quadrate yellow spots occupying about one-third 

 of the second segment leaving a narrow posterior black margin but 

 their outer borders narrowly extending from the anterior margin of the 

 first segment to the posterior margin of the second, bearing short 

 rather depressed yellow pubescence which becomes longer and much 

 erect at the side and is intermixed with a very few blackish hairs on 

 the first segment ; a small distinct spot on about the middle of the 

 lateral half of the third segment ; pubescence short, rather dense and 

 mostly suberect, blackish brown, intermixed with a few short depressed 

 yellowish hairs on both the hind part and yellow median stripe. 

 Ventre like in the female, but the first segment with a conspicuous 

 large triangular dull black spot expanded to just before the middle of 

 the second segment which has also a small well-defined same coloured 

 spot just below angle of the preceding spot and the third segment 

 bearing a narrow longitudinal black spot near its lateral margin. 



Length : 7-10.2 mm. 



This speces is easily distinguished from the other species of this 

 genus, by the large cross-band about uniformly coloured, and reaching 

 to the posterior margin, and varies but little in the Japanese specimen 

 I have seen, and as I have already described. The above description 

 of the male has been made from only one specimen, collected at Taka- 

 sago in Japan, by Prof. S. Matsumura, this being conspicuously distin- 

 guished from the female by the colouring of the abdomen, and by the 

 wing-marking. 



The rather large species, is very common in Hokkaido, and is 



