FLIES FOUND IN HOUSES 2/ 



Length. 8 mm. ; span of wings i8 mm. 



Head. In the 3 the eyes ahnost meet, but are separated in the ? by an area equal to 



one-fourth of the diameter of the head. The frontal stripe is black and the frontal 



margins of the eyes and cheeks grey. Antennae with upper joints yellow and 



terminal joint dark grey. Arista black and feathered. 

 Thorax. Clothed with a thick layer of fine reddish yellow hair of considerable length 



giving it a velvety appearance. Numerous black bristles are also present. 

 Wings. Clear, with slight smoky tinge. Squama opaque and whitish. 

 Legs. Black. 

 Abdomen. Dark grey, with irregular lighter patches, altering with the angle of view. 



When at rest the wings are folded more closely together over the back than is the 



case with the house-fly. 



This fly frequents houses especially in the spring and autumn, 

 and is apt to collect in clusters in corners and crevices especially 

 in rooms seldom occupied. Owing to their slow movements 

 they are driven out of the house with difficulty, and are said to 

 emit an odour like honey when crushed. 



Very little seems to be known about the larvae of this fly. 

 Howard (p. 239) thinks they live in excreta and decomposing 

 matter, but Keilin states that they are parasitic in certain earth 

 worms. 



Miiscina iyCyrtoneiira) stabidans Fallen. 



A broad, stoutly built fly resembling the house-fly and 

 frequently mistaken for it. It is, however, larger and more 

 robust in appearance. General colour grey. (PI. V, fig. i.) 



Length. 8 mm. ; span of wings 16 mm. 



Head. The eyes in the 3 are close together, being separated by an area equal to one- 

 ninth of the diameter of the head. In the ? they are separated by an area equal 

 to one-third of the diameter of the head. Frontal stripe in S black, in ? blackish 

 brown. Ocellar triangle black with a lighter area round it. Frontal margins of 

 eyes white, and cheeks grey. Upper segments of antennse yellowish, terminal 

 segment black. Arista black with bristles above and below. The general colour 

 of the head is whitish grey, with a ' shot ' appearance. 



Thorax. Grey, marked with two median moderately distinct black stripes, and two 

 lateral indistinct stripes. Scutellum grey. The thorax bears marked bristles, 

 which are larger on the scutellum. 



Wings. Clear ; the 4th longitudinal vein gradually bends upwards towards the third. 

 Squama opaque, white. Halteres yellow. 



Legs. Rather slender and variable in colour ranging from "reddish gold to dirty 

 orange and black in colour." 



Abdomen. Very dark grey with lighter markings. 



