Wagneria. 545 



black and shining, along the margin below whitish; it is sparingly 

 whitish-haired, especially above, and has only few black hairs behind 

 postocular bristles. Antennæ black, second joint a little pale, third 

 joint scarcely twice as long as second; arista thickened only at base. 

 Palpi yellow. Thorax bluish black, shining; bristles as in nigrans, 

 but three postsutural acrostichals and a præsutural intraalar bristle. 

 Scutelliim with three marginal bristles on each side, and a pair of 

 præapical and some discai bristles. Two sternopleural bristles. Ab- 

 domen with excavation on second segment not reaching hind margin; 

 it is bluish black, shining, with black hairs and discai and marginal 

 bristles; on second segment no bristles, on third a pair of discai and 

 marginal and on fourth a pair of discai and a row of marginal. Legs 

 black ; front tarsi a little dilated, but less than in nigrans and without 

 special hairiness. Wings with the costal part brown and discai and 

 cubital vein and the cross-veins brownish seamed; vein sbrown; 

 first posterior cell somewhat long petiolate; discai angle a little obtuse, 

 apical cross-vein almost straight; bristles on cubital vein stretching 

 to medial cross-vein; costal spine distinct. Squamulæ whitish or 

 yellowish white. Halteres brown. 



Length 7 mm. 



W. costata is rare in Denmark, I know only two specimens, both 

 females ; North Sealand (Schlick) and in Jutland at Skeide (Wtistnei) ; 

 the dates are in June. As hosts for the species are known only the 

 none Danish Caradrina superstes and Plusia deaurata. 



Geographical distribution: — All Europe; towards the north 

 to middle Scandinavia and Finland. 



Remarks: Stein (1. c. 1924) thinks that lugens Meig. (= costata 

 Meig.) is not identical with costata Fall. as Zetterstedt says (under 

 ciinctans) that there are no discai bristles on third segment. I think, 

 however, that the species are identical; one of my two specimens 

 has no discai bristles on third segment but is in all respects similar 

 to the other. — Whether lugens in Stein is really this species is perhaps 

 doubtful. 



3. W. lentis Meig. 



1824. Meig. Syst. Beschr. IV, 317, 134 {Tachina) et 1838. VII, 208, 6 

 {Clista). - 1900. Stein, Ent. Nacliricht. XXVI, 142 (Clista). — 1900. Villen. 

 Bull. Soc. Ent. de Fr. 381, 1 et 1906. Wien. Ent. Zeitg. XXV, 248 (Clista). — 

 1907. Kat. palåarkt. Dipt. III, 375. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 



35 



