Empididae. ] 25 



what coinpressed ; posterior femora pennate on both sides, the hairs 

 only slightly broad, especially on the middle femora; the tibiæ short 

 ciliated on both sides, most densely on the dorsal side of the middle 

 tibiæ and the hairs here very sh'ghtly broadened, the hind tibiæ with 

 a few short, bristly hairs on the dorsal side. Wings greyish hyaline, 

 slightly brownish towards the base; veins brownish. 



Length 2,8—3,2 mm. 



This species resembles prodromus but is easily distinguished by 

 its black-haired abdomen; also in the hairiness of the legs there are 

 many characters, f. inst. the posterior femora in the female are pennate 

 on both sides, in prodromus only above. From chioptera it is like- 

 wise distinguished by the black-haired abdomen and also by the 

 smaller size. Finally it is distinguished from both by the four scutellar 

 bristles. 



E. candatida does not seem to be rare in Denmark, but it has 

 hitherto only been taken on Sealand and Langeland, and tirst in 

 somewhat recent time, the first specimens were taken in 1884; Copen- 

 hagen in a garden. Amager, Damhusmosen, Ermelund, Ørholm, Frederiks- 

 sund (the author), at iVemmetofte and Skelskør (H. J. Hansen) and on 

 Langeland at Lohals (the author). My dates are ^Vs — •'•/t. It occurs 

 in low herbage and especially in grass. It is somewhat interesting, 

 that I have taken most of my specimens on Amager and also some 

 in Ermelund, for both localities were much visited by Stæger, and 

 yet the species was not known to him and it is not found in his 

 collection, It would seem as if it has first later appeared in our 

 country. 



Geographical distribution : — Northern and middle Europe down 

 into France; it seems to have its northern limit in Denmark; it 

 occurs also in England. 



22. E. aestiva Loew. 



1867. Loew, Berl. ent. Zeitschr. XI, 39 et 54, 11. — 1903. Kat. palaarkt. 

 Dipt. II, 232. — Empis volucris (non Meig.) : 1842. Zett. Dipt. Scand. I, 

 387, 24. — ? Empis volucris: 1862. Schin. F. A. I, 109. 



Male. Eyes contiguous; epistoma blackish. Occiput black, with 

 black hairs. Labrum a little longer than the head is high; palpi 

 black, with a few hairs at the apex. Antennæ shorter than the head, 

 black. Thorax black, shining. The dorsocentral and acrostichal bristles 

 short, biserial, black, the former somewhat longer and uniserial behind. 

 Further a humeral bristle, a posthumeral, about three notopleural, a 

 supraalar and a postalar bristle, all black; they are not very distinct 

 between other hairs present, especially inwards to the humeri. Scutellum 



