188 C. JR. Osten Sacken: Diptera 



to be considered as specific or not. I have attempted to construct a 

 Synopsis of these species, in using which it must be borne in mind 

 that it was based principally on descriptions; the division: scutellum 

 with, Or without a well-defined yellow margin, — especially, is somewhat 

 vague. This table will at least help to recognize my own species and 

 to indicate their affinities more clearly. 



Synoptic table of the species of Milesia from the Indo- 

 Malayan Archipelago and the Philippine Islands. 



Hind femora with a spine. 



Scutellum without a well-defined yellow posterior margin. 



Thorax with more or less distinct yellow or gray longitudinal 

 stripes. 

 Face silvery; thorax with distinct yellow longitudinal stripes 



Diardi Voll. 

 Face yellowish-sericeous; thorax with weak gray stripes 



Doriae Rond. 

 Thorax without longitudinal stripes. 



Wings unicolorous ff^gas Macq. 



Apical quarter of the wings brown . apicalis Voll. 



Scutellum with a well-defined yellow posterior margin. 



Thorax with transverse yellow bands (yellow margin of the 

 scutellum inconspicuous). 

 Three yellow crossbands on the abdomen 



Rehnvardtn W. 

 Only one yellow crossband on the abdomen 



Ritsemae n. sp. 

 Thorax with longitudinal lines. 



The prevaling color of face, front and legs is black 



limhipenms Macq. 



The prevaling color of face, front and legs is not black. 

 The two short longitudinal lines of the disc of the thorax 



are whitish fuscicosta Bigot. 



The two short longitudinal lines on the disc of the thorax 

 are yellow. 

 The three yellow abdominal crossbands are so broadly 

 interrupted, that they appear more like lateral spots 



maadaris W. 

 The three yellow abdominal crossbands are very little or 

 not interrupted conspicienda Wk. 



