I 



colouring" near the basal corners ; the hindmargin of each segment very 

 narrowly whitish except on the basal segment ; pubescence rather 

 dense all over, very short, greyish white, which is conspicuously inter- 

 mixed with some long, erect, stout, and black hairs on the seventh 

 segment. 



Length : I 2 mm. 



Described from only one specimen of female, from Giodeichi 

 (2nd. Oct. 19 1 4), collected by Mr. A. Nohira. 



This species is very closely allied to Iqtistriatus, Brauer, and 

 fulvus Meigen. The species descrived above is not quite indentical 

 with Norwayan species as it differs from that, by its antennal dorsal 

 hump near the base, by its comparatively broader frontal stripe, by its 

 colouring of the legs, and by its two not bowed (but nearly parallel 

 and outwardly dentate) blackish dorsal stripes on the abdomen. How- 

 ever, as the species is practically identical in many important points as 

 being same to rusticus, Linn.. I venture to take it as such ; but it is 

 easily distinguished from fulvus, Meig., by the absence of the conspicu- 

 ous golden or orange hue, which is so characteristic of that species 

 (especially in life), by the blackish grey abdomen which has no 

 conspicuous fulvus basal markings, by the blackish legs, and by the 

 comparatively narrow parallel-sided frontal stripe ; while from latistria- 

 tus, Brauer, by the absence of the fulvus markings on the abdomen, 

 by the parallel-sided narrower frontal stripe, by the paler antennae 

 which bear much fewer tiny black pubescence, and by the other minor 

 characteristes that as I have already described. These characters 

 distinguishing it from latistrialus , may be somewhat invalid, and it 

 seems quite possible that the present species may prove to be a variety 

 of the latter, in spite of the apparent discrepancies in the colouration of 

 the abdomen, but I venture to separate it from that as the species is 

 distinguished in many of important points. 



One may think this Japanese species may be an intermediate form 

 between mstiats and latistriatus . T do not know about its habits yet. 



