Blaesoxypha. 205 



withoiit particular locality; the dates are ^^/g — ^Z,, the copulated 

 pairs taken on ^^/g and ^"/e- 



Geographical distribution: — Europe, in both varieties; not 

 known north of Denmark. According to Bottcher the var. with bare 

 subcostal vein is more common in moimtain districts. 



26. Blaesoxyplia Loew. 



Medium sized or smallish species of greyish colour with dark 

 markings on abdomen, which are somewhat fixed, but, however, 

 shifting according to view to some degree. Head a little broader 

 than thorax, a little convex behind and a little puffed out below; 

 higher than long. Frons in male narrow, about one fifth to one third 

 of the eye, in female broader, very slightly protruding. Cheeks some- 

 what narrow; jowls about one third of the height of the eye, some- 

 what horizontal. In male fme ocellar and inner vertical bristles 

 present, in female the ocellar stronger and outer vertical and two 

 orbitals also present. Occiput with black hairs above, white below. 

 Frontal bristles reaching about to the middle of second antennal 

 joint, the rows diverging below; in male the two upper are reclinate, 

 the hindmost directed more or less outwards, in female the upper- 

 most directed somewhat outwards. Cheeks with fme hairs, longer 

 and in one row below. Vibrissæ slightly ascending. Epistoma not 

 or slightly retreating, slightly reflected downwards. Antennæ inserted 

 at the middle of the eye, third joint not twice as long as second; 

 arista long plumose in basal half. Thorax rectangular; three post- 

 sutural dorsocentrals; three præsutural and a præscutellar pair or 

 still more postsutural acrostichals; a præsutural intraalar bristle 

 generally present; two large and two small notopleural bristles. 

 Scutellum in male with three marginal bristles on each side, the 

 apical small, in female no apical. Three sternopleural bristles in one 

 row. Postalar declivity with more or fewer hairs. Abdomen elongated 

 conical; excavation on second segment reaching hind margin in male, 

 small and only basal in female. Only marginal bristles present, none 

 on second segment, third with or without, fourth and fifth with a 

 row. All sternites with erect hairs. Fifth sternite excised to base. 

 Genitalia small; upper forceps slender, cleft to base; lower forceps 

 small, not elongated; abdomen in female in most species ending 

 with a pointed ovipositor, wanting in lineata and some others. Legs 



