^72 THE CANADIAN ENT0MOIX)OIST 



corners of the fifth more broadly reddish yellow. None of the bands reach 

 the lateral margins. Pile yellowish white or white on base of abdomen, rather 

 long: dusky along the margins, the apical half of thfrd to fifth segments with 

 blackish pile laterally; opaque areas, except the base, with shorter black pile; 

 yellow bands with yellow pile. Abdomen rather slender; only a little oval. 



Legs reddish yellow; basal half of the front four femora, and three- 

 fourths of the hind femora, an obscure ring on the apical third of the hind tibiae, 

 and the hind tarsi apically, reddish brown. Wings slightly tinged with luteous; 

 stigma and sub-costal cells luteous, and base of wings more or less so. Squamae 



bare. 



Holotype, male, Orillia, Ontario, May 30, 1**20, two paratypcs, same 

 date, taken by the author, poising above small maple tree in opening in deep 

 woods. Types in author's collection. 



Syrphus americanus var. vinelandi n. var. 



Length 9-lOmm. Differs from typical S. americanus as follows: 



The yellow bands in both sexes are narrower, being not wider than the 

 black. 



Female: Hind femora black at the base; front more broadly shining 

 black in the middle, and the width at the vertex apparently slightly less; fifth 

 abdominal segment more black. 



Male: The spots above the roots of the antennae are larger and darker 

 than in most specimens of americanus; the black of the cheeks is usually con- 

 nected to the black facial stripe along the oral margin by a brown or black 

 stripe. 



This variety seems to approach S. niicns much more closely than typical 

 americanus, as the bands are usually more emarginate behind. 



30 specimens from Ontario and four from Wisconsin. Types in the 

 Museum of the California Academy of Sciences. 



The great difference in the larvae of the typical species and the variety 

 would seem to indicate two distinct species, but it is impossible to distinguish 

 many males, and even some females have the base of the hind femora only 

 brownish. The larvae are green with an irregular brownish blotch on the dor- 

 sum, while in typical americanus they are yellowish brown or grayish brown 

 with very much more numerous small spines. 



Syrphus americanus var. pomus n. var. 



This variety is very similar to the above, but the size is only 7 to 8mm. 

 and the color is darker throughout. The abdominal bands are slightly narrower, 

 the oral margin is more broadly darker and the legs are darker. I can find no 

 good characters for separating the two varieties, but the larvae are very different. 



Larvae pale grayish yellow, the dorsum more brownish and with somewhat 

 fewer small spines than in typical americanus. The larvae are the only ones 

 I have observed living exposed to the sun. They feed upon Aphis porni but are 

 not abundant. 



Holotype and allotype in the author's collection. 



Syrphus ruhripleiiralis, new species. 

 Habitat, California. 



