202 [September, 



species with hcemorrhoidalis, Fall., as a synonym, and uain^' the name 

 hcemorrJioidalis for Schiner's species, which they consider the same as 

 Meigen's iKsmorrlioidalis and Rondani's impudicus. Now I am unable 

 to decide from the mere descriptions what species Fallen and Mei;j;en had 

 before them, but accepting B. and 13. 's interpretations, which certainly 

 seem to me to be the most likely ones (and I have carefully read all 

 the descriptions), then the name hcemorrhoidalis, which was Fallen's 

 original name, must remain for his and Kondani's species, and pictus, 

 Meig. and Sch., must sink as a synonym ; while for the other species 

 Eoudaui's name impudicus must stand ; 1 therefore work out the 

 synonomy in brief of the two species as follows : — 



Hwmorrhoidalis^ Fallen, Rondani, non Meig., Schiner, = pictus, 



Meigen, and Schiner ; 

 Impudicus, Kondani, = hcemorrkoidalis, Meig , Schiner ; 

 and our species will then be hcemorrhoidalis. 



JRcBselia. I think 1 have also been able to clear up certain 

 doubts regarding the species in this small genus. Fallen, in his 

 Diptera Suecise " Muscides," p. 22, described the original species 

 pallipes, which had a complete 4th longitudinal vein, that is to say, 

 the apical portion which turns up to meet the 3rd longitudinal vein 

 was present, and fully developed. He referred to what he called 

 '• Var. ji ? . Monsfrosa," which had this apical portion of the 4th 

 vein missing, so that the vein ceased just before reaching the angle of 

 the upward bend. Meigen, in his " System. Beschreib. der bek. 

 europ. zweifliig. Insekten," vol. iv, pp. 411 — 2, copies Fallen's descrip- 

 tion of pallipes, and raises the var. to specific rank under the name 

 antiqua. He evidently knew the form with the restricted 4th vein 

 well, and did not know the other one at all. Since then most authors 

 seem to have believed that there was only one species (owing to the 

 fact that they have perhaps only met with one), but with so simple a 

 history it is singular how many mistakes have been made in the 

 synonomy. Kondani had it right, but Zetterstedt seems to have 

 started the mistakes, as in the Diptera Scand., p. 1050, he sinks the 

 earlier name pallipes under the later name antiqua, giving, however, 

 the correct references ; Schiner follows his example in the Fauna 

 Austriaca I, p. 516 : in his " Catalogue of European Diptera " he, 

 however, omits the name pallipes altogether, and actually assigns the 

 later name antiqua to Fallen. This mistake has been repeated by 

 Brauer and von Bergenstamm, who in the before-mentioned work, 

 vol. V, p. 410, in the list of the species of Tachinidce known to them, 



