specimen collected by the author at Noboribetsu, on the 23rd of 

 August, 19O4. This species is easily distinguished from any other 

 species of this genus, by its short and rather stout proboscis. 



III. Chrysops, Meigen. 

 Xouvelle Class., p, 23, 1800. 



Handsome middle-sized flies of mainly blackish colour, with 

 usually yellow abdominal markings, and with conspicuously banded 

 wings, and with long antennae. 



Head usually broader than the thorax. Face strongly convex 

 under the antennae, broad but extending only a little under the eyes, 

 and with large polished black or yellowish brown facial, oral, and 

 buccal callosities which sometimes more or less coalesce ; the side 

 of the middle part of the face bearing a deep pit below the facial 

 cell us ; face covering with sparse pubescence which is rather long. 

 Fro'ris of the male small, triangular, and quite bare but more or less 

 dusted near the antennae; of the female broad, usually becoming 

 broader towards the antennae, and bearing a large polished black 

 callus on the fore part ; vertex in the female elevated, in the male 

 usually prominent, in the both sexes bearing three distinct ocelli. 

 F.yes touching in the male for about the middle third of the distance 

 between the antennae and 1 cc'put, bare but sometimes inconspicuously 

 pubescent ; in life brilliant golden, bluish green, in the male with 

 purplish or rich brownish spots and hind margin, and these markings 

 distinguished from each species by their arrangements ; facets on the 

 upper part enlarged in the male, and usually equal in the female. 

 Antennae very long, usually about twice as long as the head ; first 

 joint usually very slightly dilated, and a little longer than the second 

 but sometimes as long as that ; second joint almost always with 

 inconspicuous annulations, sometimes about equal as broad as the first 

 joint ; two basal joints clothed with black hairs ; third joint somewhat 

 longer or shorter than the basal two joints together, somewhat subulate, 

 bare and more or less upturned at the tip, and with five fairly distinct 



