Dolichopodidae. 17 



Bhaphimn nasutum is probably Porphyrops spinicoxa (see under this 

 species), the number known to him is in reality 98. In XI, 185i2 he 

 further mentions Herc. chaerophylU, but this is certainly erroneous, 

 the species being no doubt germanus (see under this species). Still 

 four Danish species are mentioned by Loew, viz. Porphyrops spinicoxa 

 (Stett. Ent. Zeitg. XI, 1850, 101), Spitormon pumilus {longiseta) (ibid. 

 119), Xiphandrium appendiculatiim (ibid. 133) and finally i)o/. 1/ee^em 

 (Neue Beitr. V, 1857, 11); of these only Syntormon pumilus (longiseta) 

 and Xiphandrium appendiculatum were mentioned as Danish by 

 Zetterstedt, the number of species recorded from Denmark up to 1857 

 thus being 100. Schiner mentions (F. A. I, 1862, 214, nota) Dol. 

 Falleni from Denmark, but this species was already recorded by 

 Zetterstedt (nigripes). In the present work 172 species are enumerated. 



The subdivision of the family of Dolichopodidæ in subfamilies is 

 at present not satisfactory, at all events with regard to the palæarctic 

 fauna. In the Kat. palåarkt. Dipt. the family is divided into four 

 subfamilies. With regard to the American fauna Aldrich (A cat. of 

 North Am. Dipt. Smiths. Miscell. Coll. XLVI, 1905) has divided the 

 family into not less than twelve subfamilies; these are, I think, good 

 and natural, but the author has given no diagnoses of them. As I 

 have only examined the Danish genera and species more closely, I 

 have thought it most advisable at present to keep the subfamilies 

 given in the Kat. palåarkt. Dipt., though I am well avare, that some 

 of them are no doubt somewhat heterogenous. I have only made the 

 few alterations, that I have placed Thrypticus and Acropsilus, both in 

 the Gatalogue included in the Diaphorinae, to the Hydrophorinae, the 

 former near Medeterus, the latter near Tinophilus and Schoenophiliis. 

 The experienced Dipterologist Mr. Th. Becker in Liegnitz, to whom I 

 am indebted for many valuable hints, works at present with the 

 Dolichopodidae, and we may hope soon to have from his hånd a new 

 and more satisfactory arrangement of the family in subfamilies. 



Table of Subfamilies. 



1. Acrostichal bristles present and biserial, or when not 

 biserial, the second antennal joint inserted thumb-like 

 into the third; {Achalcus, Thrypticus and Medeterus 

 of the second division have also biserial acrostichal 

 bristles, but the two first are known by the wanting 

 anal vein, and all three have a flat or concave, 



declining area on the thorax in front of the scutellum) 2. 



2 



