Dolichopodidae. 235 



lum shorter haired than in the male. Abdomen greeiiish or coppery, 

 whitish pruinose at the sides, especially towards the front corners of 

 the segments, without yellow spots, Femora yellovv, front femora 

 more or less blackish above, middle femora blackish at the base and 



Fig. 75. Antenna of A. diapliana 9, from the inside. X 55. 



hind femora at the apex; hind tibiæ not blackish at the base. The 

 femora mainly short-haired, only the front femora with longer hairs 

 on the posterior side, and below towards the apex; middle femora 

 with a distinct preapical bristle ; front metatarsi with short hairs below. 



Length 5,5 — 7 mm. 



A. diaphana is common in Denmark; at Copenhagen, Damhussø, 

 Charlottenlund, Ordrup Mose, Ermelund, Dyrehaven, Lyngby Mose, 

 Fure Sø, Hillerød, Tyvekrog and Præstevang at Hillerød, Roskilde, 

 Faxe Ladeplads, Nyraad at Vordingborg and on the little island Eg- 

 holm at Skelskør; on Langeland at Lohals; on Lolland at Maribo; in 

 Jutland at Silkeborg and Laven near Silkeborg. My dates are ^^h, — ^'i9. 

 It occurs on bushes and in low herbage on hum id piaces, especially 

 in fens and at the horders of streamlets and ditches. 



Geographical distribution : — Northern and middle Europe down 

 into Corsica; towards the north to middle Sweden, and in Finland. 



Remarks: Fabricius has in the last of his works, Syst. Antl. 

 1805, 270, 18, Dolichopus diaphanus, and gives as locality for it "in 

 Americae insulis", and according to this the species should occur in 

 America, but this is not so. It is curious to see that Fabricius in 

 his earlier works, Syst. Ent. 1775, Spec. Ins. 1781, Mantiss. Ins. 1787 

 and Ent. Syst. Suppl. 1798, gives either, as in the two fkst "Lipsiæ" 

 as locality, or, in the last "Europæ"; only in Mantiss. Ins. he gives no 

 locality; he evidently had not this in mind when in 1805 he gave 

 America as locality without mentioning its occurrence in Europe. Loew 

 has (Mon. of Dipt. of North Am. II, 126) already discussed this, and 

 he comes to the conclusion that Fabricius has either made a mere 

 mistake with the locality in Syst. Antl., or he confounded later an 

 American species with the European one; Loew thinks the first to 



