Petina. 



539 



Orbits with only f ew fine hairs, cheeks a little more distinctly hairy and 

 with a row of bristles from the frontals to near lower end of the eye ; 

 jowls with a few bristly hairs behind. Occiput grey, with only few pale 

 hairs below, for the rest with rows of black hairs. Antennæ black; arista 

 short, thickened to some- 

 what near apex, but evenly 

 tapering. Palpi black. Thorax 

 black, bluish grey pruinose 

 almost withoiit stripes, only 

 in front with indication of 

 two quite fme stripes; scii- 

 tellum coloured as thorax. 

 Thorax has rather scattered 

 black hairs. Abdomen black, 

 shining, slightly white prui- 

 nose on front part of third 

 and fourth segment, leaving 

 broad hind margins and a 

 middle stripe black; abdomen 



is black-haired, with marginal bristles, forming a row on second, 

 third and fourth segment, and a double row on fifth; the middle 

 pair in each row is placed somewhat inwards but are not real discals; 

 the bristles strong. Legs black, bristles strong. Wings with anterior 

 part more or less strongly brown; veins yellow to brown. Squamulæ 

 whitish. Balteres dark yellow. 



Female. Quite similar; frons of about same breadth. Pruinosity 

 on abdomen almost or quite wanting. 



Length 7—8,5 mm. 



P. erinaceus is not rare in Denmark; Dyrehaven, Lyngby, 

 Hillerød, Grib Skov, Rørvig; on Lolland in Dødemose near Nysted, 

 and in Jutland at Sønderborg, Hardeshøj and Albøge on Djursland; 

 the dates are ^^/e — ^^/g- It is parasitic on Cucullia asteris, Plusia gamma 

 and on a Trypetid, Zonosema alternata in hips. — I have examined 

 Fabricius's type, which is in our collection. 



Geographical distribution : — Europe down into France ; tow^ards 

 the north to middle Sweden, and in Finland. 



Fig. 114. Head of P. erinaceus ^. 



