368 Syrphidae. 



legs gives no sure distinction, as it is varying. The female is only 

 distinguished by tiie entire black middle stripe on the frons. 



B. obscuripennis is about as common in Denmark as the preceding 

 species; Copenhagen in a garden, Charlottenlund, Ordrup Mose, Erme- 

 kind, Lyngby Mose, Geel Skov, Trørød, Tisvilde, Faxe Ladeplads, 

 Skelskør; on Lolland in Dødemose west of Nysted; on Langeland at 

 Lohals; on Funen at Odense and Strib; in Jutland in Vejle Nørreskov 

 and Greisdal, at Horsens, Hald and at Rebbild near Skørping. My 

 dates are ^Vs — ^^/g. It occurs in the same way as elongata and also 

 in Company with it. The larva (as far as could be determined of 

 this species) was found in Lyngby Mose in flood refuse on '^''U, it 

 pupated on ^^U and the imago came on i''/5 (Schlick), 



Geographical distribution: — Europe down intoltaly; towards the 

 north to middle Sweden, and in Finland. 



Remarks : The two species of Baccha are, as seen, rather similar, 

 and the distinguishing characters, especially for the females, slight; 

 Verrall records both species, but he is not sure, and says that there 

 is perhaps only one, variable European species. I think, however, 

 the species are distinct, but I do not feel quite sure, Strobl describes 

 three species, as he takes nigripennis Meig. as distinct, but of this 

 species he knew only the male; the characters he gives I cannot use 

 on my material, and I can quite agree with Verrall when he says 

 that "it will be quite time enough to accept these so-called species 

 when long series in both sexes can be contrasted and clearly differ- 

 entiated" ; especially I think that copulated pairs will be necessary for 

 a sure judgement. 



24. Spliegina Meig. 



Species of somewhat small size and of a slender, elongate shape ; 

 the colour is black with somewhat obscure reddish markings on ab- 

 domen, sometimes quite wanting. The genus is somewhat allied to 

 Baccha, but differing from it in many respects. Head somewhat semi- 

 globular, broader than high and a little broader than thorax ; it is not 

 excavated behind but flat or a Uttle arched, only in the upper third 

 there is a somewhat sudden excavation. Eyes separated in both sexes, 

 in the female a little more than in the male ; vertex, frons and epistoma 

 are equally wide. The eyes are bare; the facets just in front, towards 

 the margin, are a little enlarged in the male. Antennæ inserted a 

 little above the middle; they are short, the third joint slightly longer 

 than broad, broadest towards the end; arista rather long, a little 

 pubescent. Epistoma considerably hollowed below the antennæ, with- 



