HENRY J. FRANKLIN. 271 



Male Color Variants. — Like the typical form, but with more or less 

 yellow pile on the third dorsal abdominal segment. Three specimens 

 from Colorado and New Mexico. 



Male Color Variant 6. — Like Male Color Variant 5, but with the 

 fourth dorsal abdominal segment entirely covered with white pile. 

 One specimen, from New Mexico. 



Male Color Variant 7 . — {howardii Cress.). Like Male Color Vari- 

 ant 5, but with the third dorsal abdominal segment entirely covered 

 with yellow pile and the apical margin of the second segment bearing 

 pile of the same color. Three specimens, from Colorado, California 

 and British Columbia. 



Male Color Variant <?.— Like Male Color Variant 7, but with the 

 sides of the second dorsal segment bearing yellow pile. Several speci- 

 mens from Colorado and Idaho. 



Male Color Variant 9.— Like Male Color Variant 8, but with both 

 the second and third dorsal abdominal segments entirely covered with 

 yellow pile. Several specimens, from California, Colorado and Idaho. 



Subspecies nigroscutatus subsp. nov. — In most respects like 

 subspecies occidentalis : 



Queen. — Dorsum of abdomen with segment one black ; segment two 

 with apical margin and sides yellow, the rest black ; segment three 

 entirely covered with yellow pile ; segment four entirely black ; seg- 

 ment five entirely covered with ferruginous-whitish pile ; segment six 

 either entirely black or with more or less ferrugino-whitish pile on the 

 sides. Scutellum at most with no very great amount of yellow pile 

 and usually entirely black or nearly so. 



Worker, — Like the queen in most respects ; the yellow often of a 

 whitish shade ; the wings usually lighter than those of the queen ; the 

 sixth dorsal abdominal segment always with ferrugino-whitish pile on 

 the sides ; the scutellum always entirely, or almost entirely, dark ; 

 the face darker than that of the queen, at most with no very noticeable 

 amount of light pile. 



Male. — Much like Male Color Variant 8 of the subspecies occiden- 

 talis, but with the pile on the three apical dorsal segments more ferru- 

 ginous. 



Described from nine queens, eighteen workers and eleven 

 males. Cotypes all from California and deposited in the col- 

 lection of the United States National Museum, the collec- 

 tion of Leland Stanford Jr. University, the collection of the 

 American Entomological Society and the collection of the 

 Massachusetts Agricultural College. 



Color Variant 1. — Queen like the typical subspecies queen, but with 

 the second dorsal abdominal segment at most bearing yellow pile only 



TRANS. AM. ENT. SOC, XXXVIII. 



