Leptididae. 135 



fomenfosus = Chrysopilus attratiis and E. lineola. In Syst. Antl. 

 1805 he enumerates Leptis vanellus = tringaria, Åtherix aurata and 

 tomentosa, both = Chrysopilus aurutus, and A. lineola = L. lineola. 

 According to this the species Ch. aurutus F. and L. lineola F. are 

 originally established on Danish specimens. Zetterstedt has in Dipt. 

 Scand. I, 1842, Leptis scolopacea, tringaria, annulata, lineola, Chryso- 

 pila atraia == anruia, Atherix crassicornis, Ibis and PtioUna nigru. 

 In VIII, 1849 he adds Chrysopila diudema = aurea, and in XII, 1855 

 he moreover adds PtioUna nigrina. Now Zetterstedt has with great 

 probability had only one species of PtioUna from Denmark, and this 

 is P. obscura Fall. (see under this species). Zetterstedt thus knew 

 nine Danish species in all. — In the present paper 15 species are 

 enumerated. 



Table of Subfamilies and Genera. 



1. Hind tibiæ with Iwo apical spurs, h'ont tarsi with some 

 long, delicate hairs ; eye-facets in the male of equal 

 size or slightly different, without any dividing line ... 1. Leptidinae. 



— Hind tihiæ with one apical spur, front tarsi without 

 long haiis ; eye-fa(;ets in the male of different size, the 



dividing line sharp 2. Chrysopilinae. 



1. Leptidinae. 



1. Third joint of antennæ produced downwards, reniform; 



anal cell closed 1 . Atherix. 



— Third joint of antennæ bulb-formed ; anal cell open . . 2. Leptis. 



2. Chrysopilinae. 



1 . Third joint of antennæ bulb-formed ; palpi directed up- 



wards ; anal cell closed 3. Chrysopilus. 



— Third joint of antennæ not bulb-formed : palpi not 

 directed upwards 2. 



2. Third joint of antennæ produced downwards, reniform; 



anal cell narrowly open 4. Symphoromyia. 



— Third joint of antennæ oval, compressed, with au apical, 



slender style; anal cell closed o. PtioUna. 



1. Atherix Meig. 



Species of middle size or smallish, generally with spotted wings. 

 Head somewhat small, as broad as thorax or almost so, somewhat 

 semiglobular but flattened on the upper front side. Antennæ inserted 

 below the middle; yowls only slightly descending below the eyes, the 

 epistoma strongly impressed. Antennæ short, three-jointed, the two 

 basal joints of equal length, the third produced downwards, somewhat 



