584 Syrphidae. 



Female. Similar; vertex and frons much broader and with the 

 horders almost not angular, nearly parallel. Abdomen with three 

 golden or silvery bands besides the apex. 



Length 8— 10,5mm. 



Fig. 198. Wing of M. mutabilis d*. 



M. mutabilis is rare in Denmark; Ordrup (Stæger), Dyrehaven 

 (Drewsen, H. J. Hansen), at Sorø (Schlick); on Lolland at Nysted 

 (L. Jørgensen), and in Jutland at Horsens (O. G. Jensen). The dates 

 are ^^k — ^^/e. 



Geographical distribution : — Europe down into Italy ; towards 

 the north to southern Sweden, and in Finland; it is also reeorded 

 from Siberia. 



2. M. devius L. 



1761. Linn. Fn. Suec. 1808 et 1767. Syst. Nat. XII, 2, 985, 41 {Musca). — 

 1775. Fabr. Syst. Entom. 767, 25 (Stjrphus) et 1805. Syst. Antl. 185, 5 

 {Millid). — 1856. Loew, Verh. zool. bot. Geseli. Wien, VI, 600. — 1862. 

 Schin. F. A. I, 251. — 1899. Mik, Wien. ent. Zeilg. XVIII, 139. — 1901. 

 Verr. Brit. Fl. VIII, 662, 2, fig. 454. — 1907. Kat. palåarkt. Dipt. III, 154. — 

 M. micans Meig. 1822. Syst. Beschr. III, 165,3. — M. anthinus Meig. 1822. 

 1. c. III, 165, 4 Tab. XXVI, Fig. 34. — M. apiformis Curt. (nec De G.) 

 1824. Brit. Entom. 70. — 1843. Zett. Dipt. Scand. II, 641, 1. 



Male. This species is very similar to the preceding one; the hairs 

 on vertex, frons and epistoma pale yellow to whitish, about the ocelli 

 more or fewer black hairs. Antennæ with the third joint a little 

 longer, more than twice as long as the second; arista longer, about 

 as long as third joint. Thorax rather green, the hairs pale yellow, 

 on the middle between the wing-roots is a patch of black hairs. 

 Scutellum æneous green with pale yellow hairs, less dense than in 

 7nutabilis; just the spines on scutellum may be reddish. Pleura with 

 the bare, wedge-shaped space above the front coxæ quite polished as 

 in mutabilis. Abdomen greenish black, haired as in mutabilis but the 

 pale hairs always silvery or pale brassy, and distinctly shorter than 



