116 
Psyche 
[April 
received a specimen from Pennsylvania referable to evecta with 
reddish pile on the third segment, which indicates that Williston 
probably had eastern specimens before him. Rufomaculata seems 
to be peculiar to the more elevated portions of the Rocky Moun- 
tains. 
Volucella bombylans arctica Johnson. 
V. bombylans from arctica Johns., Psyche, vol. 23, p. 163, 
1916. 
With only the American forms for comparison I would have 
considered this a distinct species, but it resembles so closely 
specimens in my collection from the Alai Mountains, Turkestan, 
received under the name V. hcemorrhoidalis Zett., that it seems 
best to consider it an arctic subspecies of this circumboreal 
species. Types from Rama and Nain, Labrador. 
Volucella bombylans evecta Walker. 
V. evecta Walker, Ins. Saund. Dipt., p. 251, 1856. 
Walker’s description calls for a form with — head black, an- 
tennae reddish, thorax thickly clothed with “tawny hairs,” 
abdomen with black hairs, with two bands of “tawny hairs, one 
band at base paler than the other which is near the tip.” Walker 
does not clearly define the difference between a light yellow and a 
reddish yellow so that the pile on the posterior segments of 
evecta may be either yellow or reddish. In actual use the word 
tawny covers many shades of color from pale ochre to swarthy 
brown. Evecta is the upper austral form extending through the 
transition zone. 
Volucella bombylans evecta var. americana Johnson. 
V. bombylans form americana Johns., Psyche, vol. 23, p. 162, 
1916. 
This is the more common form, the typical evecta being less 
frequently taken in New England. 
