56 E. Brunetti : Notes on Oriental Syrphidse. [Vol. IT, 



of the tarsi being a little browner. The anterior femora bear a 

 little pale hair on their under side, but the black hairs on the hind 

 pair extend almost to the tip below, the upper apical part being 

 bare. All the tibiae bear ver}^ short golden yellow pubescence 

 the hind pair having a row of short black bristles on the outer 

 side. 



Wings pale yellowish grey, slightly tawny on the basal and 

 anterior parts. Halteres orange. TegulcC bright orange-yellow with 

 concolorous fringe. 



Described from four & rf and two 9 5 (one, a melanic $ des- 

 cribed below) all from vSikkim and in the Indian Museum collection 

 in good condition. 



One specimen (a melanic ? ) has the antennae almost entirely 

 black (another characteristic of Didea), the abdomen black with a 

 dark blue sub-metallic reflection, beset with short black hairs, the 

 only marks being a transverse band across the centre of the 2nd 

 segment, composed of two narrow straight oblong spots, extending 

 to the distinct ridged edge which runs round the entire abdomen ; 

 some yellow hair on the 2nd segment. Belly black, but with the 

 two pale yellow spots at the base of the 2nd, 3rd and 4th segment 

 exactly resembling those in the typical* form ; posterior edge of 

 segments narrowly yellow, showing a tendency to spread at the sides 

 on the 2nd segment. 



N.B. — I had some hesitation before deciding to establish a 

 new genus for the reception of this welbmarked species, but probably 

 if I had not done so, some other author would. It appears 

 to be intermediate between Didea and Sy r pirns ^ having the broad 

 ovate and ridged abdomen of the former genus, but differing in the 

 straight 3rd longitudinal vein and pubescent eyes. 



The pubescence of the eyes, and the dip of the 3rd longitudinal 

 vein are neither of them conclusive characters, and as Syrphus 

 contains species some with bare and others with hairy eyes, and 

 also species with straight and dipped cubital veins, I think Didea 

 might well do the same, and I would have kept the species in that 

 genus, except for the reason given above. 



ERIOZONA. 



E. ruficauda, milii, sp. nov. (PI. xi, fig. 2.) 

 9 . Sikkim. T^ong. 13 mm. 



Face promiiient, bright yellow, shining, with minute yellow 

 pubescence, smooth ; cheeks and lower part of face black with 

 very inconspicuous black hairs. Front above antennae to vertex 

 blackish with black hairs, with a pale irregularly-shaped yellow spot 

 immediately over the antennae, which are black. Uyes pubescent, 

 wide apart, frontal space graduall}^ widening from vertex to cheeks. 



Thorax quadrate, blackish above, sides dark brown with brown- 

 ish yellow hairs, hair on dorsum less thick ; scutellum brown with 

 yellowish hairs. 



