A NEW ORIENTAL SPECIES OF THE GENUS MUSCA 



WITH A NOTE ON THE OCCURRENCE OF MUSCA DASYOPS STEIN IN 



CHINA AND A REVISED LIST OF THE ORIENTAL SPECIES OF 



THE GENUS MUSCA LINNAEUS 



By W. S. Patton 

 Lecturer on Entomology and Parasitology, Edinburgh University 



In a large collection of Muscidae from Java, Amboina, Bor- 

 neo, and Honolulu recently sent me by Mr. J. F. Illingworth 

 there are four specimens of a species of Musca which I believe 

 is new to science. It is described below under the name Musca 

 illingworthi, in honor of Mr. Illingworth, who has done much 

 to advance our knowledge of the higher Diptera of the Oriental 

 and Australasian Regions. 

 Musca illingworthi sp. nov. 



MaZe.—Average length of two specimens, 7.5 millimeters. 

 Eyes bare and nearly meeting in the middle line; frons a 

 narrow black line, pinched in the middle; parafrontals, para- 

 facials, and cheeks silvery; third antennal segment mouse gray; 

 palps black and proboscis normal. 



Thorax, ground color grayish blue with four broad black 

 stripes meeting at the anterior end of the thorax and not in- 

 terrupted at the suture; scutellum black in the middle and 

 bluish gray at the sides. Two well-marked presutural dorso- 

 central bristles, presutural acrostical bristles wanting. Abdo- 

 men with apparent first segment dark brown or black anteriorly 

 and at the sides, and a rather diffuse dark brown patch in the 

 middle line, which in one specimen forms a partial dark basal 

 band; the anterolateral and ventral sides of the tergite dark 

 orange; apparent second segment with a broad median black 

 stripe widening out anteriorly, and in the darker specimen 

 fusing with the dark patch on the postero-median area of the 

 first tergite; in addition, there is a broad silvery stripe on each 

 side of it, and a large silvery spot at the extreme margin of 

 the tergite ; the intervening space is dark orange. The apparent 

 third and fourth segments are similar to the second, the ad- 

 median brown stripes tending to form a narrow dark posterior 



