334 MEDICAL ENTOMOLOGY 



either side of the central black stripe on the third segment, and a similar 

 white patch at the sides of the second and third segments. Length 

 5'8 to 6*5 mm. 



Female (Plate XLIII, tig. 1). Ground colour lighter than the male. 

 Thorax yellowish grey, with four dark bands similar to those in the 

 male ; scutellum olive grey. Abdomen lemon yellow with darker patches ; 

 first segment with a central black longitudinal stripe. Second segment 

 also with a central stripe, and two somewhat indistinct triangular brown 

 bands at the sides; the intervening areas are silvery grey and rectangular 

 in shape. Third segment with markings very similar to those of the 

 second, the lateral bands narrower and pointed towards their anterior 

 ends ; fourth segment olive grey, with two narrow converging lateral 

 brown bands. Length 6*5 to 7'5 mm. 



Musca nebulo, Fabr. Male. Thorax, ground colour dark grey to 

 bluish grey with four black longitudinal stripes ; scutellum dark grey. 

 Abdomen yellowish throughout with a somewhat narrow black central 

 longitudinal stripe ; fourth segment with a small indistinct olive grey 

 patch at its centre. Length 5 to 5'5 mm. 



Taken as a whole the male nebulo is considerably smaller and darker 

 than the male dotnestica ; the thoracic bands are narrower, and the 

 fourth abdominal segment is much lighter in colour. 



Female (Plate XLIII, fig. 2). Thorax, ground colour yellowish grey, 

 with four clove brown longitudinal stripes ; scutellum light grey. 

 Abdomen yellow, with a black median longitudinal stripe on the second 

 and third segments, and an incomplete stripe on the first and fourth ; 

 lateral borders of second and third segments with a faint brown stripe, 

 and shimmering patches at the sides. Length 5 to 6 mm. 



Musca nebulo is the common house fly of South India, and breeds 

 in night soil trenches, but can be easily reared in horse dung, and in the 

 contents of the intestines of goats, which are to be found collected outside 

 slaughter houses in India. Its puparium is of a dark mahogany colour. 

 It is probably much more widely distributed in India than is at present 

 believed ; it occurs in Bombay, and in parts of Gujarat. 



Musca sp. incert. Male. Frons very narrow, much narrower than 

 that of the male nebulo. Thorax, ground colour dark grey to bluish grey, 

 with four black longitudinal stripes, broader than those of nebulo ; scu- 

 lellum black in the centre, and greyish at the sides. Abdomen dark 

 orange with a broad black central longitudinal stripe on the second to 

 the fourth segments inclusive, narrowest on the last ; on each side of 

 this median band there is a well-defined silvery stripe, and two similar 



