478 Observations on Habits and Parasites of Common Flies 
The writer 1 has published short descriptions with enlarged drawings 
of several of these species,, namely C. erythrocephala, C. vomitoria, L. 
caesar, M. domestica, P. rudis, M. stabulans, S. calcitrans, F. canicu- 
laris, S. carnaria, S. stercoraria, to which the reader is referred 
Of the other species figured in Plate XXVII short descriptions are 
given in the following pages. 
Phormia groenlandica Ztt. 
A large, strongly built, shining, dark blue fly, nearly as large as the 
blow-fly, but not so stout. 
Length. 10 mm.; span of wings 22 mm. 
Head. The eyes are dark red, and separated, in the male by a distance of 0-5 mm., 
in the female by T25 mm. The frontal region and cheeks are black. Antennae 
dark; arista feathered on both sides except the terminal fourth. Palps yellow. 
Thorax. Dark blue with some very poorly marked longitudinal stripes. Dorso- 
central bristles absent. The mesonotum is distinctly flattened just behind the 
transverse suture. 
Wings. Clear, with fourth longitudinal vein curved up towards the third. Squama 
yellow. 
Legs. Black. 
Abdomen. Blue. 
Protocalli'pliora azurea Fin., a much rarer fly, closely resembles 
P. groenlandica in size and appearance, but the eyes on the male 
are closer together (separation 0-25 mm.) and the bristles on the thorax 
are strongly developed. Only two males and two females of this species 
were caught during the season. 
Pyrellia eriophthalma Mcq. 
A rather large, dull-green fly, slightly smaller than Lucilia. 
Length. 9 mm.; span of wings 18 mm. 
Head. Eyes in the male very close, in female separated by 1 mm. Frontal region 
and cheeks dark. Antennae black. Arista feathered above and below from 
tip to one-third from proximal end, where the lower feathers cease. 
Thorax. Dark dull green with grey stripes in anterior portion. Inner post-sutural 
dorso-central bristles, one near abdomen; outer dorso-central, four. 
Wings. Slightly yellow, with fourth longitudinal vein curved up towards the third. 
Squama yellow. 
Legs. Black. 
Abdomen. Dark green. 
1 Graham-Smith, G. S. (1914). Flies in relation to disease. Non-bloodsucking flies. 
Cambridge University Press. 
