272 AMERICAN HYMENOPTERA. 



on its apical margin and sometimes entirely black ; scutellum some- 

 times entirely yellow and even the black interalar band with an ad- 

 mixture of yellow hairs. Three specimens, from California and British 

 Columbia. 



Color Variant 2. — Queen and worker like the typical subspecies queen 

 and worker, but with the second dorsal abdominal segment, except 

 the very basal middle, entirely covered with light yellow pile. Two 

 specimens, from California and Montana. 



Male, Color Variant i.— Like the typical subspecies male, but with 

 the second, as well as the third, dorsal abdominal segment nearly or 

 entirely covered with yellow pile ; the femora often largely clothed with 

 light pile to their tips. Several specimens from California. 



Male Color Variant 2. — Like Male Color Variant 1, but with the 

 first abdominal segment bearing some yellow hair ; face and occiput 

 bearing mostly light yellow pile ; ventro-lateral portions of the head 

 with much yellow pile ; thorax entirely covered with yellow, except for 

 some dark pile in the middle between the bases of the wings and the 

 dark metapleura and median segment ; venter and femora largely 

 clothed with light pile ; the second dorsal abdominal segment entirely 

 covered with yellow pile. Several specimens from California and 

 Colorado. 



The males and workers of this subspecies are by no means 

 always distinguishable from those of the subspecies occiden- 

 talis, but as a rule they have more strongly ferruginous pile 

 on the apical abdominal segments than do the males and 

 workers of that subspecies. 



The subspecies nigroscutatus is for occidentalis a variation in 

 the direction of B. terricola, but the two species seem to me 

 to be quite distinct, though it is not impossible that they 

 should be considered as subspecies of the same species, as 

 Handlirsch has considered them. They are certainly very 

 closely allied. 



Habitat. — This species ranges through at least the greater 

 portion of Alaska(mouth of Dall River, Seldovia, Eagle and 

 Nushagak River) and Yukon Territory, through the greater 

 part of British Columbia (including Vancouver Island), 

 through at least the western part of Alberta, through Wash- 

 ington, Oregon, Idaho and at least the western part of Mon- 

 tana, through the greater part of California, through the 

 greater portion of Nevada, through Utah and all except the 

 extreme eastern portion of Colorado, through the greater 



