72 E. Brunetti : Notes on Oriental S^'rphidee. [Vol. II, 



The species sculptatus of V. d. Wulp seems to be separated from 

 crassus, F., only b}- the absence of the large red-and-black spine 

 on the underside of the hind femora, and the abnormal width of 

 the 2nd abdominal segment, which the author says forms the major 

 part of the abdomen^ whereas in the common crassus it is of normal 

 width. 



Table of Oriental species 0/ Megaspis. 



A Basal half of wing entirely quite black. 

 B Hind femora bright tawny red, with 

 black tips. 



Hind femora untoothed below ; 2nd 

 abdominal segment abnormally 

 wide .. .. Long. II mm. sculptatus^Y. Wulp 



Hind femora with distinct black- 

 and-red tooth below, near tip ; 

 2nd abdominal segment normal. 



Long. 12-15 mm. crassus, F. 

 BB Hind femora wholly black. Long. 15 mm. chrysopygus, Wied. 

 AA Basal half of wing not black ; only 

 normally a little tawn}' brown. 



1. Hind femora, basal half tawn}', rest 

 blackish brown with soft yellow hair. 

 Thorax almost wholly occupied by an 



ill-defined blackish square dorsal 



spot, with a tendency to be divi- 

 ded transversely from each side by 



a light, very narrow cross-band. 

 Abdomen (more or less tenax-like), 



with a large black triangular spot 



on the posterior border of each 



segment, barely reaching the sides. 

 Wings pale yellow, without distinct 



suffusion, merely the mediastinal 



cell tawnyish, also base of wings. 

 Face, seen from above, pinkish tawny 



( cr' ) ; greyish with black hair ( 5 ) 



Long. I0-T2 mm. errans, F.' 



2. Femora ipiicolorous, but varying 

 from light brown to blackish ; hind 

 pair never with tawny basal half and 

 dark apical half. 



Thorax with a wide, well-defined, 

 quite black uninterrupted trans- 

 verse band, occupying one-third 

 the vertical length of the dorsum. 



I Tn the accompanying diagram of the thorax of this species the dorsal 

 dark marks are shown mnch more distinct than they really are : the shape of the 

 markings will, however, clearly distinguish the species, 



