268 AMERICAN HYMENOPTKRA. 



ish hairs on the sides. Venter mostly black, but the apical margins 

 of the apical segments fringed more or less with white or whitish 

 hairs. 



Wings. — Moderately stained with brown ; the fore pair variable, but 

 usually lightest across the middle and darkest about the anterior apical 

 portion of the radial cell. 



Legs. — Mostly dark ; the middle tibiae sometimes with a noticeable 

 amount of ferruginous pile on their hind sides, especially toward their 

 distal ends ; corbicular fringes always more or less strongly ferruginous. 



Worker. — Much like the queen, but the wings usually somewhat 

 lighter ; the scutellum at most with only a slight mixture of yellow 

 hairs with the black ; face usually mostly dark, without a very notice- 

 able amount of yellowish-ferruginous pile, and often entirely dark. 



Male. Head. — Shaped much like that of the females. Face bear- 

 ing a large amount of yellowish pile, sometimes pure and sometimes 

 mixed with black ; mostly dark above the bases of the antennae. Occi- 

 put sometimes with pure yellowish pile and sometimes with black hairs 

 admixed. Ventro-lateral portions of head often with a noticeable 

 amount of brownish yellow pile ; the cheeks otherwise dark. Malar 

 space longer than its width at apex ; about one-fifth as long as the 

 eye. Clypeus usually mostly covered up with pile. Flagellum of an- 

 tenna about two and one-half times as long as the scape ; third and 

 fifth antennal segments subequal in length, the fourth shorter than 

 either. 



Thorax. — Coloration much as in the queen and with about the same 

 variation, but the mesopleura often with the yellow pile extending 

 down from the dorsum, in a rather narrow line, nearly to the bases of 

 the legs and occasionally entirely covered with yellow pile to the bases 

 of the legs. 



Abdomen. — Dorsum: The first four segments entirely black ; the last 

 three entirely covered with white or whitish pile, often with a more or 

 less strong ferruginous tinge. Venter colored much as in the females, 

 but usually with somewhat more light pile. 



Genitalia. — As already described for the group. See figs. 119 and 

 120. 



Wings. — About as in the worker ; subhyaline. 



Legs. — Sometimes with little or no light pile, but the coxae and tro- 

 chanters usually, and the bases of the femora often, with considerable 

 yellowish or brownish yellow pile on their lower sides and sometimes 

 the femora largely clothed with light pile even to their tips ; the hind 

 sides of the middle tibiae usually and often also the anterior tibiae, 

 bearing a considerable amount of ferruginous pile ; outer faces of hind 

 tibiae slightly convex, naked, smooth and shining ; the corbicular 

 fringes usually strongly ferruginous ; posterior metatarsi without long 

 hind fringes. 



