480 Observations on Habits and Parasites of Common Flies 
Length. 9 mm.; span of wings 20 mm. 
Head. In the male eyes separated by 0-2 mm., in female by 1-25 mm. Frontal 
stripe black; the frontal margin of the eyes and face white. Antennae black 
and arista feathered on both sides except near tip. 
Thorax. Four broad black bands run backwards to middle of thorax, and a black 
diamond-shaped mark stretches over the posterior part of the thorax and base 
of the scutellum. 
Wings. Clear with fourth longitudinal vein curved upwards towards the third. 
Squama white. 
Legs. Dark grey. 
Abdomen. Grey and black with distinct chequered appearance. 
Muscina pabulorurn Fin. 
Resembling M. stabulans in appearance, but larger and with more 
distinctly defined dark markings on the thorax and abdomen. The 
legs.also are dark. 
Mydaea lucorum Fin. 
A brown fly rather larger than the house-fly, M. domestica. 
Length. 7 mm.; span of wings 16 mm. 
Head. Eyes in the male almost touching, in the female separated by 1 mm. Frontal 
stripe in female grey, and frontal margins of eyes white. Antennae black. 
Arista feathered above and below. 
Thorax. Brown with irregular and ill-defined dark stripes and markings. 
Wings. Clear, but anterior and posterior cross veins have diffuse brown areas 
around them. The fourth longitudinal vein passes straight outwards to the 
edge of the wing. Squama yellow. 
Legs. Dark brown. 
Abdomen. Brown with dark spots. 
Polietes lard aria Fab. 
A very large, grey fly, bearing a superficial resemblance to S. carnaria. 
Length. 10 mm.; span of wings 24 mm. 
Head. Eyes in male almost touching, in female separated by 1-25 mm. Frontal 
stripe is black, and the frontal margins of the eyes and face pale yellow. 
Antennae dark grey and arista feathered above and below. 
Thorax. Grey wdth dark longitudinal stripes, well-defined in front, but less well- 
defined further back. 
Wings. Clear and large. Fourth longitudinal vein runs straight out to the margin 
of the wings. Squama white. 
Legs. Dark grey. 
Abdomen. Grey and black wdth distinct chequered appearance. 
