SARCOPHAGID FLIES FROM SOUTH-EASTERN QUEENSLAND. 71 



(Fig. 23). One of these males was submitted to Dr. J. M. 

 Aldrich of the United States National Museum, who determined 

 it as S. dux Thomson. These males cannot be distinguished 

 from S. subtuberosa, described from the Philippines and Guam 

 by Parker (1917). In a note to Dr. E. W. Ferguson of the 

 Health Department, Sydney, Dr. Parker referred to the latter 

 species as being s>Tionymous with *8'. dux Thomson. A female 

 specimen of S. dux from Honolulu, kindly lent us by Mr. Henry 

 Tryon, is indistinguishable from females determined by E. E. 

 Austen as S. misera. These forms agree so closely Avith Walker's 

 species that the differences are sufficiently recognised by placing 

 the flies under the nam? S. misera var. dux. 



The distribution of tliis variety is very wide. Thomson 

 described his material from Honolulu, where its presence has 

 also been referred to by Grimshaw and by Timberlake (1917). 

 Parker's specimens came from the Phihppines and Guam ; ours 

 were captured in Brisbane. Tliis variety is one which has 

 no doubt been included under 8. frontalis by Australian 

 authors, and is probably common in New South Wales. 



12. Sarcophaga aurifrons Macquart 1846 {nee Doleschall 

 1858) (Fig. 4). 

 Syns. : S. aurifera Brauer and Bergenstamm. 

 S. aurifrons Froggatt 1905, 1907, 1915. 

 S. aurifrons Tryon 1917. 

 S. aurifrons Johnston and Bancroft 1920. 

 S. aurifrons Mackinnon 1920. 



In general appearance a medium-sized greyish golden 

 fly, about 10 mm. in length. 



Male. — There is considerable variation in the shape of the 

 head. In some specimens the eyes are either flat in front or 

 (sometimes) slightly bent inwards giving the small frons a very 

 prominent appearance. In each form the frons at its 

 narrowest point is about one-third the width of eyes ; while 

 the frontal stripe is wide below, then becoming exceedingly 

 narrow (less than half the width of parafrontals), widening 

 again in the region of the ocelli. In other specimens the eyes 

 are more projecting, the front proportionally less prominent, 

 and the frontal stripe about two-thirds the width of an eye. 

 The two tjq^es may occur among forms bred from the same 

 parent. Eyes very dark red-brown. Parafrontals bright 



