127 
Now the question about the names arises; which of these two 
species is maculaia Meig., and is the other species new, or is it 
to be found among the synonyms under maculaia? With regard 
to the first question Becker, who had examined Meigen’s type, 
expressly States, that maculata Meig. has three bristles on the 
hind tibiæ, we may therefore, I think, take it for granted that this 
species is maculata Meig. The other question is solved still more 
easily and with full certainty, for in our collection we have the 
types to notata Zett., just the male and the female mentioned by 
the author as sent him under this name from Stæger (and there¬ 
fore Becker (p. 73) did not find it in Zetterstedt’s collection), and 
these types are identical with my species, the species with four 
bristles on hind tibiæ ; this species thus gets the name no¬ 
tata Zett. 
It will, I think, in most cases not be possible to make out the 
synonymi of these two species without examining the types, yet 
some of the more important synonyms may, I think, be given with 
some certainty. It was stated, that Becker has shown, that the 
species with three bristles on hind tibiæ may be taken for macu¬ 
lata Meig.; helicivora Léon Duf. is, according to the figure of 
the puparium, likewise maculata . Zetterstedt’s maculata is, ac¬ 
cording to specimens from his collection which I have examined, 
identical with notata; he says about the hind tibiæ „tri-spinosæ M , 
but he continues „hæ apice sub 4-calcaratæ“, and this latter ex- 
pression declares, I think, that he describes them as three-spined 1 ); 
his maculata and notata are thus the same species, so that it is 
easily understood that he says under the latter „Vix nisi varietas 
maculatæ u . As Wood says about his maculata , that it has four 
bristles on hind tibiæ, his species is no doubt notata. Keilin’s 
puparium No. 2 is according to the above nolata , and his No. 1 
is maculata , and Schmitz’s determination of his maculata is cor- 
rect. We can then at present give the following synonymi (but 
it must be born in mind, that there is the possibility, that by some 
of the authors both species may be mixed in their material): 
l ) For the rest the earlier authors’ statements about the bristles are not 
always correct; thus Zetterstedt describes the middle tibiæ as two-brist- 
led, and Becker says, that the middle tibiæ have only one apical spur; 
both statements are incorrect. 
