Lucilia. 



14a 



— Hypopygium small, mainly densely fine-haired; upper for- 

 ceps with the dorsal margin not curved inwards; arms of 

 lower forceps blade-shaped, not pointed 6. flavipennis. 



1. L. silvarum Meig. 



1826. Meig. Syst. Beschr. V, 53, 4 (Musca). — 1845. Zett. Dipt. Scand. 

 IV, 1318, 7. — 1862. Schin. F. A. I, 591. — 1896. Pand. Rev. Entom. XV, 

 219, 17 {CalUphora). — 1907. Kat. palåarkt. Dipt. III, 541. — 1911. Kram. 

 Abhandl. Nat. Geseli. Gorlitz, 27, 42, Tab. III, Fig. 7. — 1924. Stein, Arch. f. 

 Naturgesch. 90, 6, 263, 6. 



Male. Frons narrow above but orbits not touching, a narrow 

 frontal stripe present. Orbits blackish above, downwards together 

 with cheeks and jowls silvery; frontal stripe 

 black. Orbits with few, fme black hairs, jowls 

 black-haired. Occipiit black, downwards along 

 the eye margin whitish grey, with all black 

 hairs. Antennæ black, third joint about three 

 times as long as second. Palpi black, some- 

 times paler to yellowish with dark apex. Thorax 

 black-haired; three postsutural acrostichals. 

 Abdomen black-haired; third segment with a 

 pair or more of marginal bristles. Upper forceps 

 straight, cleft to above the middle, the arms 

 thin; the arms of lower forceps of a similar 

 shape, tapering into a long apex, likewise 

 straight and of the same length as upper for- 

 ceps; both pairs obtuse at end, the upper with 

 a little knob. Legs black. Wings hyaline or 

 slightly tinged, more at base; squamular piece 

 at base of costa black; subcostal sclerite without bristles. Squamulse 

 whitish, the lower more or less brownish fumigated. Halters blackish 

 or brownish. 



Female. Similar; frons about as broad as the eye. Squamulæ- 

 whitish. 



Length 5,5 to fully 8 mm. 



L. silvarum is not specially common in Denmark; Lersø, Ordrup, 

 Geel Skov, Birkerød, Hillerød, at Sorø; on Lolland at Nysted and in 

 Jutland at Sønderborg, Made Skov, Skeide, Høruphav and Graa- 

 sten; the dates are ^^/^ — 22^^ 



Geographical distribution: — All Europe; towards the north to 

 middle Sweden, and in Finland ; it is also recorded from North America. 



Fig. 25. L. silvarum, 

 forceps in profile. 



