23,4 Patton: The Genus Musca Linnxus 317 



of the specimens a narrow, black, basal band; apparent fourth 

 segment exactly similar to the third. Sternites black, forming 

 a characteristic ventral black band which is lighter in the paler 

 specimens noted above. Wings clear, radio-medial root vein 

 normally with four long bristles, sometimes three or even two; 

 and a row of bristles on the lower surface of vein R 4+6 extending 

 well beyond the radio-medial cross vein. Squamae whitish 

 yellow and bare. 



Female — Twenty-six specimens from Baguio, Mount Maqui- 

 ling, Los Banos, Mount Banahao, Tacloban, Dapitan, and Zam- 

 boanga (Baker) , and from Culasi, Panay {McGregor) . Average 

 length of specimens, 8.5 millimeters. Frons more than half the 

 width of the eye ; frontal stripe narrow and about half the width 

 of the frons with straight edges ; paraf rontals wide, silvery gray, 

 with two rows of small bristles; vertex dark; cheeks silvery; 

 antennae, palpi, and proboscis as in male. 



Thorax more silvery and stripes a little narrower than in the 

 male. Abdomen grayish, and when rubbed brownish with black 

 stripes and bands. Apparent first segment black with bluish 

 gray admedian patches often extending almost the whole width 

 of the segment and forming a band; apparent second segment 

 gray with a broad median black stripe and two narrow lateral 

 ones which broaden out at the lower border of the segment 

 forming narrow black bands externally; in addition, a narrow 

 black band along the anterior border of the segment ; apparent 

 third segment exactly similar but without an anterior band; 

 apparent fourth segment yellowish gray with a broad median 

 stripe, and often narrow lateral ones. Characters of wings, 

 squamae, legs, etc., similar to those of the male. 



I have much pleasure in naming this striking species in honor 

 of Prof. C. F. Baker, who has contributed much to our knowledge 

 of the Diptera of these Islands. 



Musca bakeri is closely allied to M. bezzii Patton and Cragg 

 and M. hervei Villeneuve, recently described from Tonking and 

 China. The male differs from that of bezzii by its lighter-colored 

 thorax and narrower stripes ; by the markings of the apparent 

 first abdominal segment, which in bezzii always has a patch of 

 light brown along the lower border, and which does not extend to 

 the middle line ; by the fewer number of hairs on the radial root 

 vein (normally there are seven in bezzii) ; and by the black 

 sternites. The female differs from that of bezzii by its narrower 

 parafrontals, especially just above the level of the bases of the 

 antenna?, and by the fewer number of hairs on the radio-medial 



