20 Platypezidae. 



and præhypopygial segment and hypopygium likewise grey. Hypo- 

 pygiiim small, with small, yellow end claws. Abdomen with erect, 

 black, not specially long hairs. Anterior legs yellow or a little brownish, 

 tarsi blackish towards end, hind legs brown or blackish; hind tibiæ 

 a little dilated oiitwards, hind metatarsus very dilated and second 

 joint a little dilated. The legs sparingly black-haired and femora 

 only slightly fringed, only hind femora and tibiæ above with a little 

 longer fringe; the special bristles as in Fallent^ but middle tibiæ 

 without distinct dorsal bristle, and middle metatarsi with two bristles 

 beside each other near base below; the posteroventral bristle at 

 apex on front tibiæ yellow. Wings clear but yellow; veins black. 

 Sqiiamulæ blackish brown. Halteres with the pedimcle yellow, the 

 knob velvet black. 



Female. I have not seen the female; according to the descriptions 

 it has the frons grey. Thorax black, but greyish at front and sides 

 and somewhat brownish behind. Abdomen with the three basal 

 segments yellow with indication of a narrow dusky middle line, the 

 rest black, apex silvery. Hind legs less dilated. Wings not yellow. 



Length 3 mm. 



A. elegantula is very rare in Denmark, I have taken only one 

 specimen, a male, in Geel Skov on leaves of Acer, ^^s 1918. 



Geographical distribution: — Scandinavia and England, towards 

 the north to middle Sweden, and in Finland. 



Remarks: I have seen the species in Zetterstedt's collection, 

 it is fully agreeing with my specimens. 



3. A. antennata Zett. 



1819. Zett. Vet. Acad. Handl. 79, 32 {Callom.yza) et 1844. Dipt. Scand. 

 III, 921, 12 (Calhmyia). — 1824. Meig. Svst. Beschr. IV, 15, 7 {CaUomyia). — 

 1826. Fall. Dipt. Suec. Suppl. 4, 3 {Callomyza). — 1862. Schin. F. A. I, 240 

 {CaUomyia). — 1901. Verr. Brit. FI. VIII, 31, 1, fig. 53. — 1907. Kat. palåarkt. 

 Dipt. III, 185. — 1910. Walilgr. Entom. Tidsskr. 232, 1. 



Male. Vertex, frons and face black. Occiput black with black 

 hairs below. Antennæ black, third joint elongated and evenly tapering, 

 about three times as long as broad, but rather varying in this respect 

 and sometimes not much more than twice as long as broad. Palpi 

 blackish. Thorax velvet black with the usual bristles. Pleura black, 

 mesopleura velvet above. Abdomen all velvet black, apical margin 

 of sixth segment and genitalia black but not velvet, or a little greyish. 

 Hypopygium small, with small yellowish end claws. Abdomen with 



