2 PSYCHE [February 



Description of the Worker [Plate I, Fig. 1]. 



Head black or verv dark brown; with the mandibles (except a narrow margin), 

 the clypeus (except a large arrow-shaped mark in the middle), a somewhat triangular 

 spot on front, the sinus and the space above and behind the eye yellow [in some 

 cases the yellow has a brownish tinge]. Antennae black, with the scape yellow in 

 front and the flagellum sometimes slightly brownish beneath. Thorax dark-brown 

 to black; with the posterior border of the prothorax, a more or less narrow line in 

 front, two longitudinal stripes on the mesothorax, the borders of the tegulae, the 

 scutellum (except a median line) a transverse line on the post-scutellum, two large 

 irregular sjiots on the metathorax, a broad band on the mesopleura, two spots on the 

 metapleura yellow. Al)donien black or a very dark l)rown, with a narrow transverse 

 band on the posterior border of each segment, a narrow transverse band on the 

 anterior border of the first segment, and a narrow transverse band across the second 

 segment, a transverse band across the posterior margin of the ventral side of each 

 segment and large blotches on the ^ent^al side of the second segment yellow. The 

 transverse band across the middle of the dorsal surface of the second segment is 

 slightly ferruginous and is interrupted in the middle; legs yellow, more or less tinged 

 with ferruginous, anterior border of femur brown to black, wings smoky with nervures 

 brown. 



The length of the Avorkers of this nest ranged from thirteen to fifteen millimeters. 

 The length of the head was 2 mm., the width from 4 mm. to 5 mm., the height from 

 3.5 mm. to 4 mm. The length of the thorax was from 4 mm. to 5 mm., the width 

 4 mm., the height 4 mm. The length of the abdomen was 7 mm. to 9 mm., the wndth 

 from 4 mm. to ry mm., the height 3.5 mm. to 4 mm. 



Description or the ^Iale [Fig. 6]. 



The coloration of the head is similar to that of the worker, but the dark blotch is 

 absent from the clypeus. The coloration of the thorax is similar to that of the 

 worker, but the yellow is absent from the metathorax. From the dorsal aspect the 

 coloration of the abdomen is similar to that of the worker. The coloration of the 

 ventral side of the abdomen is similar to that of the worker but the ground plan is 

 more reddish and the yellow markings less distinct. Indeed throughout the yellow 

 is more indistinct on the male than on the female. 



