\Q Orthorrhapha lirachycera. 



similar behaviour of D.plumipes; the male of this species also hovering 

 over the female, and then trying copulation, and I have myself often 

 observed the same with regard to Herc. germanus, the females sitting 

 on flowers of Umbellifers, the males hovering a short time above the 

 female, and then trying to copulate. In nearly all cases, also in my 

 own observations, copulation was never gained; only Dahl mentions 

 that the male succeeded after repeated attempts. In the mentioned 

 cases the authors think, that the ornamented legs, or, in the Hygro- 

 celeuthus, the antennæ, are of use for the male in attracting the 

 female; I can say nothing about this, only I raay remark, that in fJe re. 

 germamis no ornamentations are found. Gopulated pairs of Dolicho- 

 podids of various genera have otherwise been observed by several 

 authors. 



From the palæarctic region about 586 species of Dolichopodids 

 are known, and from North America about 526; I find 10 to be 

 recorded as common to both regions. 



No case of Hymenoptera parasitic on Dolichopodids is recorded. 



DoUchopodidae earlier recorded from Denmark. — Kramer (Specim. 

 Insectol. Dan. 1760) has no Dolichopodid in his list ofDiptera. Briin- 

 niche (Prodrom. Insectol. Siælland. 1761) has one species, Musca 

 tingulata, and in 1763 (Pontoppidan, Dansk Atl. I) he has the same. 

 O. F. Muller (Faun. Fridrichsd. 1764) has likewise only the same. 

 It can only be said about this, that the species is probably a Doli- 

 chopiis, or no doubt whatever DolicJiopus or similar species, that has 

 come into the hånds of these authors. Miiller's new^ species, Musca 

 squamata seems to be the male of some DoUchopus. Fabricius has 

 in 1775 (Systema Entomologiæ) only one species, Musca rostrata {Me- 

 deterus diadema L.), for which Denmark is given as locality, and only 

 the same is again enumerated in Species Insectorum, II, 1781, Ento- 

 mologia systematica, IV, 1794, and as DoUchopus rostratus in Systema 

 Antliatorum, 1805. Stæger gives in 1842 (Krøyer's Tidsskr. IV, 1) a 

 work over the Danish species of the group he termed DoUchopodes 

 lamelliferæ i. e. Hijgroceleuthus, DoUchopus., Tachytrechus, Poecilobo- 

 thrus, Hercostomus and HypophyUus. He enumerates 46 species, which 

 are enumerated again by Zetterstedt; one ofthem, by Stæger described 

 as Dol. ciUefemoratus Macq., which species it cannot be, remains still 

 unidentified, as Stæger's specimens are lost. Zetterstedt enumerates 

 in 1843 (Dipt. Scand. II) 73 species, and in VIII, 1849 he has further 

 26 species, thus in all 99 species. As he does not mention Hypo- 

 phyUus discipes (patellatus by Zetterstedt) from Denmark, the number 

 of species then known would be 100, but as Zetterstedt mentions 

 Argyra argyria both as D. argentatus and argentellus, and as his 



