18 Platypezidae. 



4. Hind legs scarcely dilated 3. antennata. 



— Hind legs well dilated 4. viduella. 



5. Abdomen yellow on basal half, black on apical balf .... 2. elegantula. 

 ■ — Abdomen black with yellow side spots on three first seg- 

 ments 5. cinerea. 



6. Thorax velvet black 7. 



— Thorax grey 8. 



7. Abdomen with basal half yellow, apical half black 2. elegantula. 



— Abdomen quite black 4. viduella. 



8. Abdomen grey and black 3. antennata. 



— Abdomen with basal half yellow 5. cinerea. 



1. A. Falleni Zett. 



1819. Zett. Vet. Acad. Handl. 77, 30. {Callomyza) et 1844. Dipt. Scand. 

 III, 919, 10 {Callomyia). — 1823. Fall. Dipt. Suec. Suppl. 3, {Callomyza). — 

 1824. Meig. Syst. Beschr. IV, 16, 9 {Calloniyia). — 1862. Schin. F. A. I, 240 

 (Callomyia). — 1900. Verr. Cat. eur. Platyp. 4. — 1907. Kat. palåarkt. Dipt. 

 III, 186. — 1910. Wahlgr. Entom. Tidsskr. 32 et 232, 9. — Callomyia Megerlei 

 Meig. 1824. 1. c. IV, 16, 10. 



Male. Vertex black; frons and face grey. Occiput grey with 

 black hairs below. Antennæ yellow, apex of third joint and arista 

 blackish; third joint about twice as long as broad, oval, but with. 

 the apical part attenuated and styliform. Palpi yellow. Thorax 

 greyish brown or brown to dark brown, with the usual rows of black 

 bristles. Pleura bright grey. Abdomen yellow, with more or less 

 dark brown lateral spots on second to fifth segment, small in front, 

 but being large backwards; sixth segment for the greater part grey 

 or blackish, Abdomen with long erect hairs, nearly all yellow on 

 first and second segment, black on the rest. Hypopygium about 

 triangular in profile, the apical claws thin, nearly styliform; below 

 a pair of claw-like appendages with the apex hook-like, bent ven- 

 trally. Bristles at ventral base of hypopygium strong. Legs yellow, 

 tarsi somewhat darkened towards apex; hind femora a little dilated, 

 hind tibiæ rather dilated outwards, hind metatarsus strongly dilated 

 and the two following joints somewhat dilated. The legs have short 

 black hairs, rather dense on hind metatarsus; front femora cihated 

 on posteroventral side and front and middle femora a little ciliated 

 posteriorly above in outer half; hind femora long-fringed above 

 and below and hind tibiæ above; the front femora have the usual 

 peculiar bristle at base and tibiæ a posteroventral bristle above apex; 

 middle tibiæ have two dorsal bristles above middle and an apical 

 spur, and middle metatarsus has a bristle at base below and three 



