300 AMERICAN HYMENOPTERA. 



ning, in a very indefinite band (of varying width), across its middle or 

 apical portion (sometimes this segment is almost entirely black and 

 sometimes it has so much yellow pile that only traces of the black are 

 noticeable) ; segment four sometimes with some black pile at its base, 

 but usually entirely covered with ferruginous-yellow pile ; segment five 

 entirely covered with ferruginous-yellow pile ; segment six more or less 

 ferruginous-yellow. Venter sparsely clothed with dark brown or black 

 pile, with very little or no admixture of light hairs. Hypopygium 

 without a median carina. 



Wings. — Subhyaline, only very slightly stained with brown ; the 

 veins of the fore pair noticeably darker than their membranes, and their 

 general color lightest in the region beyond the veins, often in this por- 

 tion being clear hyaline. 



Legs. — Coxae, trochanters, femora and tibise bearing little or no pile 

 of a color other than dark brown or black ; the corbicular fringes some- 

 times slightly ferruginous tipped. The corbicular areas comparatively 

 very flat. 



Worker. — Much like the queen, but with the mesopleura often 

 covered with light yellow pile nearly or quite to the bases of the legs. 



Male Head. — Face with a patch of pale yellow and black hairs 

 mixed, between and below the bases of the antennae and reaching down 

 over the clypeus, but not approaching the inner margin of the eye on 

 either side ; occiput with a triangular patch of pale yellow pile ; cheeks 

 mostly dark. Malar space distinctly longer than its width at apex; 

 fully one-third as long as the eye. Clypeus usually mostly covered 

 with pile. Third and fourth antennal segments sebequal in length, 

 the fifth much longer than either. 



Thorax. — Dorsum covered with yellow pile, except for a wide, but 

 more or less indefinite, black interalar band, there being usually at 

 least a slight admixture of pale hairs with the dark pile ; pleura light 

 or dark, according to the specimen. 



Abdomen. — Dorsum with coloration of pile much like that of the 

 queen, but the third segment sometimes entirely yellow and the apical 

 segments always entirely covered with ferruginous-yellow pile (of 

 greatly varying shade) ; some specimens with all the first five segments 

 entirely covered with yellow, and the two apical ones with light ferru- 

 ginous-yellow pile. Venter clothed with dark brown and pale yellow 

 pile quite evenly mixed over all the segments, but in greatly varying 

 proportions on different specimens. 

 Wings. — Mostly hyaline. 



Legs. — Coxse, trochanters and femora, all bearing a considerable 

 amount of yellow pile ; fore tibiae mostly dark ; middle tibiae with con- 

 siderable ferruginous pile on their hind sides ; hind tibiae with outer 

 faces somewhat convex and mostly bare on their distal halves, their 

 fringes long and strongly ferruginous or ferruginous-yellow ; hind 

 metatarsi with rather long ferruginous-yellow hind fringes. 



