Dolichopodidae. 161 



Wesenberg Lund found the cocoons in the sand at the border of 

 Fure Sø on ^^Is and bred one of them in the Danish hydrobiological 

 Station; the imago came on^^/s; he found the cocoons in some num- 

 ber, but bred only one specimen, the other cocoons being already 

 empty; the number of the cocoons would indicate that the species 

 is not specially rare, but it is not sure that the other cocoons be- 

 longed to this species, as the other two species were present on the 

 same place, but these have not been bred, The somewhat late time 

 of the year on which the species was bred seems to indicate a second 

 brood, and the presence of such is also suggested by Verral (Entom. 

 Month. Mag. XV, 1904, 243). 



Geographical distribution: — Europe and down into North Africa; 

 it perhaps does not go farther north than Denmark, as insignis by 

 Zetterstedt is probably ripicola (see the remarks). 



Remarks: In Kat. palåarkt. Dipt. is plumipes Macq. (Soc. Se. 

 Lille, Dolich. 1827, 68, 20, and Suit. å Buff. 1835, II, 662, 36) placed 

 as synonym to consobrinus Walk., while insignis Stæg. is correctly 

 placed under this species; but as Stæger 1. c. has stated correctly, 

 Macquart has confused more than one species under his plumipes, 

 and at all events insignis v^as included in it, for he had sent a 

 male of his plumipes to Stæger, and it is just the one male, which 

 Stæger describes (insignis had at that time not yet been found in 

 Denmark), and that it is insignis is proved by its yellow epistoma. 

 Maquart also in 1827 terms the epistoma in the male "blanc argenté", 

 but in 1835 in Suit. å Buff. he calls it "jaune". 



I have not included Zetterstedt's insignis in the synonymy, as 

 I have two specimens from Bohuslån, collected by A. Malm and determined 

 as insignis, but they belong to ripicola Loew ; it is therefore very pro- 

 bable that Zetterstedt's species is also ripicola, especially as his speci- 

 mens were likewise taken in Bohuslån. 



7. Poecilobotlipus Mik. 



Species of somewhat large size and of bright metallic colour. 

 The genus is in most respects similar to Dolichopus and especially to 

 Hercostomus, with which latter it is nearly related, and from Avhich 

 it was separated in 1878 by Mik (Dipt. Unters. Jahresb. d. k. k. akad. 

 Gymnas. Wien, 1878, 3.). Head as in Dolichopus, epistoma somewhat 

 narrow in the male, broad in the female; the clypeus not reaching to 

 the lower margin of the eyes. Eyes hairy, metallic green in the 

 living specimens; the facets very slightly enlarged towards the epi- 

 stoma in the male. The bristles surrounding the oral aperture 



11 



