ancc are, however, sufficient to clearly locate our Japanese species. 



This is still an enormous submenus, even after separating off 

 Therioplectes and Atylotus, and many species are exceedingly 

 difficult to distinguish. In our species, it is, however, somewhat easy 

 to find the distinctions between allied species. Up to the present time, 

 we have 36 species throughout our Islands from north to south, as 

 tabulated below : 



Key for Spedes. 

 A. Frontal calli two, never connected. 



1. Thorax and scutellum same colour. 



2. Abdomen with no bands or spots or almost so. 

 3. Blackish species. 



4. Thorax and abdomen same colour 



kotoshoensis, Shir. (n. sp.) 



44. Thorax and abdomen different colour, abdomen reddish 



brown with the apex blackish arisanus. Shir. (n. sp.) 



33. Yellow species sapporocnsis, Shir. (n. sp.) 



22. Abdomen with bands or spots. 



3. Frontal stripe veiy broad with two quite separated broad 



calli ; abdomen with three rows of small yellowish grey 



spots on the second to sixth segments ... cordiger, Meigen. 



33. Frontal stripe not very broad with a band and a narrow 



calli ; abdomen with a continuous yellowish median stripe 



and narrow yellowish segmentations 



fiilvimedioidis, Shir. (n. sp.). 



II. Thorax and scutellum not same colour, scutellum covered with 

 white or yellowish hairs. 



2. Dark brown species with yellowish-haired scutellum and yellow- 



haired band on abdomen. 

 3. Abdomen reddish brown about the base with six narrow 



yellowish bands .fulvicinctus Ricardo. 



33. Abdomen blackish brown with no reddish base. 



