Blaesoxypha. 207 



Of this species I know only the female. The male will, however^ 

 be known at once as it has both præhypopygial segment and hypo- 

 pygiiim red. Female. Frons about as broad as the eye; orbits as 

 broad as frontal stripe. Orbits and face bluish grey. Bristles on cheeks 

 few, not strong. Antennæ with third joint not much longer than 

 second, not reaching lower margin of the eye. Palpi black. Thorax 

 bluish grey pruinose, the middle black stripe narrower than the 

 lateral; three præsutural and a pair of præscutellar acrostichals. 

 Abdomen grey or yellowish grey pruinose, with black tessellations, 

 a middle stripe and oblique lateral spots somewhat constant; third 

 segment with a pair of quite weak marginal bristles. The apical 

 segment and the ovipositor bright red, the latter strong, claw-Iike^ 

 curved forwards in under venter and deeply hollowed on dorsal side. 



Length 5,5 mm, but recorded to 10,5 mm. 



The species will be easily known by the red genitalia in both 

 sexes and the forwards curved ovipositor in the female. 



B. erythrura seems to be very rare in Denmark, we have only 

 one female specimen without particular locality. 



Geographical distribution: — Europe down into Italy; towards 

 the north to middle Sweden. 



2. B. grylloctona Loew. 



1861. Loew, Wien. ent. Monatschr. V, 386. — 1907. Kat. palåarkt. Dipt. 

 III, 493. — 1911. Kram. Abhandl. Nat. Geseli. Gorlitz, 27, 34, Tab. II, Fig. 8. 

 — 1924. Stein. Arch. f. Naturgesch. 90, 6, 202, 3. — S. gladiatrix Pand. p. p. 

 Villen. Ann. Soc. Ent. de Fr. LXXVI, 397. 



Male. Frons narrow, about one fiftli of the eye. Orbits and face 

 yellowish or brownish grey. Bristles on cheeks of moderate size, in 

 one row. Antennæ with third joint a little longer than second, not 

 reaching lower margin of the eye. Palpi black. Thorax greyish or 

 brownish grey pruinose, the middle black stripe a little narrower 

 than the lateral; some pairs of præ- and postsutural acrostichals. 

 Abdomen brownish grey pruinose, with three black, rather constant 

 lines; third segment with a pair of marginal bristles. Præhypopygial 

 segment grey, with not strong marginal bristles. Hypopygium black; 

 upper forceps slender, reddish, curved slightly ventrally, pointed. 

 Claspers of about equal length. Penis with a short forwards bent end 

 and a lobe above it. Legs with long bristles; hind femora with antero- 

 dorsal, anterior and anteroventral bristles. Wings a little tinged^ 

 veins black. 



