88 AMERICAN HYMENOPTERA. 



apex, about one-sixth as long as the eye. Clypeus, for most part, 

 moderately and rather finely punctate, coarsely punctate on anterior 

 corners. Third antennal segment somewhat longer than the fifth, the 

 fifth somewhat longer than the fourth. 



Thorax. — Dorsum covered with deep rich ferruginous pile, the very 

 center of the disc bare, smooth and shining. Mesopleura covered with 

 yellow pile to the bases of the legs. Metapleura mostly clothed with 

 yellow. Extreme sides of median segment usually with considerable 

 yellow pile. 



Abdomen. — Dorsum : segment one bright yellow ; segment two from 

 about one-third to one-half clothed with yellow pile, this yellow cover- 

 ing the middle portion of the segment in the form of a patch reaching 

 from the front to the hind border of the segment and somewhat wider 

 in front than behind, the sides of this segment rich fox-red ; segments 

 three, four and five all clothed with deep rich fox-red pile ; segment 

 six mostly dark. Venter mostly dark, but the apical fringes of most 

 of the segments ferruginous, at least toward the sides. 



^f^z«^5.— Rather light, only very moderately infuscate. 



Legs. — Coxae mostly dark, but sometimes with a little light pile near 

 their apices. Fore and hind trochanters usually mostly dark, but often 

 with some yellow hairs, and sometimes the hind pair with considerable 

 light pile on their lower sides ; middle trochanters usually with much 

 light pile on their lower sides. Femora very often entirely dark, but 

 the middle pair often with considerable yellowish pile on their lower 

 sides and the fore and hind pair sometimes with some light hair below. 

 Fore and middle tibiae usually entirely dark, the latter often with a 

 noticeable amount of ferruginous hair mingled with the black on their 

 outer sides, especially toward their distal ends. Hind tibiae with cor- 

 bicular fringes strongly ferruginous, i. e., with ferruginous hairs more 

 or less strongly intermixed with the black. Hind metatarsi with no 

 long fringes. 



Worker. Head. — Except for the fringes of the labrum and hairs on 

 the mandibles, with only dark pile. Malar space and antennae as 

 in queen. Clypeus apparently somewhat smoother and rather more 

 delicately punctate than that of the queen. 



Thorax. — Dorsum covered with black pile ; the very center of the 

 disc naked ; the very front part of the dorsum and the hind margin of 

 the scutellum sometimes with an inconspicuous admixture of light yel- 

 low hairs. Pleura and sides of median segment clothed as in queen. 



Abdomen. — Dorsum : segment one as in queen ; segment two as in 

 queen, but with the ferruginous pile replaced by black and the yellow 

 patch usually covering somewhat more than one-half of the segment ; 

 segment three usually entirely dark, but sometimes with a few yellow 

 hairs on the basal middle ; segments four, five and six all dark. Ven- 

 ter dark, sometimes with a few scattering yellow hairs. 



Wings.— Wevy light, transparent, only slightly infuscate. 



