go Syrphidae. 



with fernora black with yellow apex; anterior tibiæ yellow with a 

 broad black ring nearest the apex, largest and most defined on middle 

 tibiæ; hind tibiæ black with the base soraewhat broadly and just the 

 apex yellow; tarsi yellow, middle metatarsi generally a little brownish 

 above, and hind tarsi more or less brownish above on all joints or 

 especially on the basal ones. Claws yellow with the tip black. Hind 

 femora not thickened; hind metatarsi somewhat thickened. The legs 

 are clothed with whitish or yellow hairs, long behind the anterior 

 femora and on the anterior side of the hind femora, and somewhat 

 long above the hind tibiæ; tarsi with short, adpressed, yellow pubes- 

 cence. Wings hyaline or slightly yellowish, sometimes darkened about 

 the middle; veins brownish black; stigma yellow. Squamulæ whitish. 

 Halteres yellowish white, the knob generally darker to brown. 



Female, Antennæ a little longer than in the male. Frons æneous 

 black, shining, with the side dust spots large but somewhat ill defined ; 

 the hairs on frons and epistoma yellow, only black above the antennæ. 

 Eyes short er-haired than in the male. Occiput puffed out and shining 

 above. Thorax with shorter pubescence than in the male. Abdomen 

 shining and more punctate, the pubescence shorter; the yellow spots 

 generally fully as large and paler. 



Length 7 — 9,5 mm, the female smallest, generally not above 

 7,5 mm, but sometimes reaching the male in length. 



This species is easily known trom the other Danish species by 

 the yellow anterior tarsi and the quite pale pubescence; also the shape 

 of the face in the male is characteristic, as it is broader and higher 

 than in other species. All my specimens have distinct yellow spots 

 on abdomen, but according to JMalm and Verrall (1. c.) the spots may 

 be very small and often quite wanting in the male. Malm mentions 

 a female specimen with four spots, as there were also a pair on third 

 segment. With regard to the question whether the species is identical 

 with festiva Meig. as suggested by Schiner an Verrall I can say 

 nothing. 



P. luteitarsis is rather rare in Denmark; besides three old speci- 

 mens in Stæger's Collection I possess nine specimens seven of which 

 1 have taken in a garden in Copenhagen, one in Ermelund, and one 

 in a garden in Hillerød. The dates are ^^In—^le. 



Geographical distribution: — Northern and middle Europe down 

 inlo Hungaria, towards the north to southern Sweden; should it 

 prove to be identical with festiva, the range goes much farther towards 

 the south. P. festiva is also, but somewhat doubtfully, recorded from 

 North America. 



