436 Syrphidae. 



with a broad, black, shining middle stripe and the mouth edge and 

 lower lateral parts black and shining; jowls black. Vertex black- 

 haired, frons with yellow and epistoma with pale yellow hairs; epi- 

 stoma slightly hollowed below the antennæ and somewhat retreating 

 below the central knob and a little descending. Occiput silvery pruinose 

 along the eye-margin to above the middle, above blackish, slightly 

 pruinose ; the hairs whitish below, yellow above and at the upper 

 eye margin a row of long, black hairs. Eyes with brownish hairs. 

 Antennæ with the basal joints blackish, the third brownish or pale 

 brown, sonietimes darker above ; it is roundish square, rounded at the 

 end; arista pale brown, rather long plumose on nearly the basal two 

 thirds, the rays a little longer above than below. Thorax brownish 

 black, somewhat shining, the front half part very slightly and in- 

 distinctly pruinose or almost not; thorax is clothed with yellow hairs. 

 Scutellum yellowish to dark brownish, the hairs yellow, generally 

 black on the middle. Pleura with long, yellow hairs. Abdomen black, 

 second segment dull, third and fourth shining with the front and hind 

 margins dull; on the second segment are two inwardly triangular, 

 yellow side spots, at the sides generally occupying the whole length 

 of the segment, and on third segment there are small or a little 

 larger, transverse basal corner spots, generally confluent at the margin 

 with those on second segment, but sometimes separated and some- 

 times rather obscured; the spots are dull; the hind margins of the 

 segments yellow, rather narrow ; abdomen is clothed with yellow hairs, 

 pale just at the base ; at the hind margin of second segment are black 

 hairs, generally reaching to the sides, in rare cases there are also 



Fig. 155. Wing of E. horticola cf. 



black hairs in the middle at the hind margin of third segment. Venter 

 grey with long, pale hairs, the basal segments often pale with dark 

 middle spots. Legs with the femora black with yellow apex, hind 

 femora with the base more or less yellow; front and hind tibiæ with 



