Aphiochaeta. 



395 



what distinct. Wings yellowish, in the darkest forms clear or nearly; 

 veins paler or darker brown; costa about 0,33 of the wing-length, 

 costal divisions about as 4 — 1 — 1, but varying, and I have f. inst. 

 measured about 22 — 7 — 6 so that 1 is not always double 2+3; 

 third vein a little thick and thus the outer branch of the fork much 

 thicker than the inner, the outer branch a little angulated; costal 

 cilia short, but a little varying; fourth vein very slightly curved and 

 generally a little abrupted at the base. Halteres yellow. 



Fig. 114. Wing of A. pygmaea $. 



Female. Similar; the third abdominal tergite narrowed, much 

 narrower than the second, roundly excised at the sides and with the 

 hind margin narrower than the front margin ; also 

 the following segments a little narrowed, the 

 fourth rectangular in shape (fig. 115); hind femora 

 with the hairs below as in the male. 



Length 1,3 to about 2 mm. 



Remarks: I have studied Zetterstedt's types 

 and found them identical with the present species; 

 there are several specimens of both sexes, labelled 

 "Smoland", and the female shows the same shape 

 of the abdominal tergites as described above; 

 besides there were at the end three specimens 

 which did not belong here, one, labelled "Bjørnst.", 

 was indeterminable, the second, labelled "Abus.", 

 seemed to be angelicae, and fmally the last was a 

 large specimen, not at all similar to pygmaea and 

 with four scutellar bristles; this latter specimen 

 is perhaps the one mentioned by Zetterstedt 



Schmitz remarks (Entom. Ber. Nederl. Ent. 



Fig. 115. 



A. pygmaea $, 



abdomen. 



under Obs. 



Ver. V, 1919, 187) 

 that pygmaea and branchyneiira Egg. must be different species, as the 

 female of brachyneiira does not show the curious constriction of the 



