314 The Philippine Journal of Science 1923 



{McGregor) ; 3 females from Los Baiios (Baker) and 1 from 

 Culasi, Panay (McGregor). Since writing my notes on this 

 species in the paper referred to above, I have examined Wiede- 

 mann's types of Musca sorbens, humilis, latifrons, mediana, and 

 spectanda and find they are all identical; sorbens, being the 

 oldest name, must, I regret to say, replace the well-known name 

 humilis. I have also examined the types of Musca angustifrons 

 and bivittata, and am now able to confirm Stein's determination; 

 but the type of niviesquama Thomson is not sorbens but vetus- 

 tissima Walker. Professor Bezzi tells me he has examined the 

 type of scapularis Rondani and that it is identical with sorbens. 

 Musca sordissima, the type of which I have examined, is also 

 this species. I wish here to correct a mistake made in the deter- 

 mination of Walker's types of conducens and praecox. A re- 

 examination clearly shows that they are not sorbens but the 

 Oriental species known as lineata Brunetti, which name now 

 becomes a synonym of conducens. 



Musca sorbens is a very variable species, and these specimens 

 from the Philippines are darker than most of the Oriental and 

 Ethiopian specimens, and the apparent first abdominal segment 

 of the male is dark brown. However, I have in my collection 

 from India a long series of bred and caught specimens which 

 exhibit variations from the light first abdominal segment to the 

 dark brown type as seen in the Philippine specimens; many of 

 the African specimens also exhibit this variation in color. In 

 all other respects the present specimens are typical. 



The width of the frons of the male of Musca sorbens is also 

 very variable, as has already been pointed out by Stein. The 

 females do not vary much, either in color or in structural char- 

 acters ; the Philippine specimens are typical. 

 Musca vetustissima Walker. 



Musca pumila Pattern (nee Macquart). 



Musca minor Patton (nee Macquart). 



Musca humilis Stein and authors (nee Wiedemann). 



Musca corvina Froggatt (nee Fabricius). 



Musca niviesquama Thomson (nee Stein). 



The collection contains 1 male from Los Baiios (Baker), and 

 5 females from Alabang, Rizal Province, and Culasi, Panay 

 (McGregor), also from Baguio and Los Baiios (Baker). In 

 my notes on the Oriental species of the genus, in the paper 

 mentioned above, I have recorded this species under the name 

 Musca pumila Macquart, but as I have been unable to find any 



