Occasional Papers of the Miiseinn of Zoology 9 



Bombus ternarius Say var. expallidus n. var. 



Female (queen) with liair of first four segments of ab- 

 domen reddish tawny, without any bright ferruginous ; the first 

 and fourth segments are tawny hke the second and third, not 

 clear pale yellow as in the typical form. 



P'loodwood, Schoolcraft Co.. July 20, on"e female (Gaige 

 22). Franklin speaks of the red color of Bombus "fading 

 out," producing pallid forms. Experimental evidence on this 

 point is wanting, but I believe that the pale varieties, which 

 seem to occur in almost all tlie species with bright red hair, 

 are true varieties, probably recessive to the normal forms. 

 Thus in the present collection there is one expallidus, among 

 a great number of ternarius, which do not present various 

 degrees of "fading out." In other localities the pale forms 

 occur in some numbers, and appear to be practically uniform. 

 Thus yir. Kenoyer took four examples of B. edzvardsii v. 

 kenoyeri Ckll., a variety entirely analogous with expallidus, at 

 Tolland, Colorado, along with typical examples of the form 

 having red hair (bifarius Cresson). It must also be noted 

 tliat the first and fourth regments of expallidus have a redder 

 shade than the typical form, and this cannot well be due to 

 fading. 



i". Hair of face and front all black; yellozv hair of scutelluni 



not divided. 

 j\ Hair of abdomen tawny yclloiv on first four segments, 



black beyond. Malar space long. 



Bombus fervidus (Fabricius). 



Whitefish Point, Chippewa Co., June ,27, one queen (An- 

 drews i). 



j-. Hair of abdomen yellozu {not tazvny) on first tzvo seg- 

 ments, black beyond. 



