296 AMERICAN HYMENOPTERA. 



Legs. — Black ; the tips of thecorbicular fringes slightly ferruginous; 

 a little ferruginous hair on the hind sides of the fore and middle tibise. 



Worker. — Like the queen, but with a narrower black interalar band 

 and the pleura, though shaded somewhat with black hairs, pretty 

 strongly yellow to the bases of the legs. 



Male. Head. — Face below the bases of the antennae and the cly- 

 peus bearing a distinct, but somewhat indefinite, tuft of yellow pile ; 

 occiput mostly dark, but with a strong sprinkling of yellow hairs ; 

 cheeks mostly dark, but with a few yellow hairs. Malar space between 

 one-third and one-half as long as the eye. Third, fourth and apical 

 antennal segments subequal in length, considerably shorter than any 

 of the rest except the pedicel. 



77!(3ra;tr. —Coloration of pile on the dorsum much like that of the 

 queen, but the black interalar band not nearly as definite as in that 

 caste, there being a strong admixture of yellow hairs with the black. 

 The pleura dark, but with a strong admixture of yellow hairs. 



Abdomen. — Dorsum: segments one and two yellow; the follow- 

 ing segments shaded with black hairs, but with light yellow hairs 

 admixed somewhat, especially on the side margins, and predominant 

 on the third segment ; the two apical segments with considerable 

 ferruginous hair. Venter with yellow hairs admixed with the black 

 considerably. 



Wings. — Hyaline, except the veins. 



Legs. — Trochanters and femora heavily covered with very dull yel- 

 low pile, mixed with black hairs ; fore and middle tibige with some 

 ferruginous hair ; hind tibiae with very long ferruginous fringes ; all 

 the metatarsi fringed considerably with ferruginous hairs, those on the 

 hind margins of the posterior pair being long. 



Dimensions . — Length : queen, about 21 mm. ; male, about 16 mm. 



Habitat. — Pribilof Islands. 



This species is apparently closely allied to both strenuus 

 and kirbyellus. The latter, however, has a longer malar 

 space in all its castes than does this species, and strenuus 

 has the first three dorsal abdominal segments evenly and 

 equally covered w^ith yellow pile and the apical segments of 

 the queen with considerable ferruginous hair. Polaris, an- 

 other close relative, may be separated from kincaidii by the 

 ferruginous-yellow pile of its apical dorsal segments and by 

 its usually less punctate clypeus. I think it not improbable, 

 however, that extensive collecting may prove that kincaidii 

 is only a color variant or subspecies of either strenuus or 

 polaris. 



