318 The Philippine Journal of Science ms 



root vein ; they are, however, difficult to distinguish. The male 

 of bakeri can be distinguished from the male of hervei by the 

 portions of the tergites adjoining the sternites being brown, 

 whereas in hervei they are black; and in hervei there are no 

 bristles along the lower border of vein R 4+5 . Although I have 

 seen the female of hervei in Doctor Villeneuve's collection, I 

 have not studied it sufficiently closely to note how it differs 

 from bakeri. 



Several of the specimens of Musca bakeri in the collection 

 show evidences of "having ingested blood, suggesting clearly the 

 habits of this species. I have no doubt it is the species referred 

 to by Mitzmain in his work on surra. It would be interesting to 

 know whether or not this species is larviparous. 



The types and most of the cotypes have been returned to 

 Professor Bezzi ; I have several cotypes in my collection for 

 further study. 



SPECIES OF GROUP III 



(Walker). 



Musca praecox Walker. 



Pristirhynchomyia (Philaematomyia) lineata Brunetti. 

 Musca humilis Patton (nee Wiedemann). 

 The collection contains 8 males from Los Banos and Mount 

 Maquiling {Baker) and from Batbatan {McGregor) and 17 fe- 

 males from Los Banos and Mount Maquiling {Baker) and from 

 Culasi, Panay {McGregor). The males are typical specimens 

 of this small, very variable species, but the females are darker 

 and have broader abdominal bands. In my paper on the Oriental 

 species of the genus, referred to above, I stated that the types 

 of Musca conducens and M. praecox were small examples of 

 M. sorbens, but on reexamining them and comparing them with 

 some fresh material from India I now see that they are the 

 species described by Brunetti under the name lineata. It is 

 important to note that the thoracic stripes of the males of this 

 species are often so close together as to appear to be united. 

 These specimens can easily be mistaken for small examples of 

 M. sorbens Wiedemann. 



Musca conducens belongs to both the second and the third 

 groups and links the two together. It is hamiatophagous and, 

 though unable to draw blood, has well-developed prestomal teeth 

 which are reduced in number and are certainly capable of 

 scratching off a small scab or clot of blood. 



