474 CLAUDE rULLER. 



numbei'. of joints and a similar pattern to tliose of tlie major 

 soldier. Joints II and XVII often as long as tliese joints of 

 the major soldier antenna. Joint III often sub-equal to II, 

 but generall}' longer. Joint V generally shorter than II. 



Major Worker. 



Measurements. — Total length 7 to 9" 5 mm. ; head- width 

 2-1 to 2-6 mm. 



Head. — Dark brown or dai'k red-brown, somewhat mar- 

 morate ; occipital region and genas paler, stem of Y-suture 

 pale, with a bright white or bright pale yellow spot in fork of 

 suture ; eye-spots pale, translucent yellow ; clypeo-frontal 

 suture darkened; clypeus paler than frons with a median 

 brown stripe ; epistome white with brown diffuse stripes. 

 Labrum-epipharynx translucent, brown or tinged with green. 



Mandibles at base pale yellow-brown merging thi'ough 

 diffuse brown to the black teeth. 



Dorsal outline U-shaped; vertex polished. Frons with 

 a small circular pit in fork of Y-suture and with an oblong 

 transvei'se depression posterior to clypeus. Clypeus elliptical 

 oval ; epistome with distal edge brace-shaped. 



Antennas dark brown to smoky-black, ringed with white ; 

 XVII or XVIII-jointed ; in XVIII-jointed form III and IV 

 sub-equal and V always larger than VI; in XVII-jointed form 

 III is longer than IV and V smaller than VI. 



Thorax. — Sordid, yellow-brown. Pronotuin narrower 

 than head ; (quartered by a median and a transverse pale line. 

 Mesonotum half the length of pronotum and narrower. 

 Metanotum wider than mesonotum, but not longer. 



Legs pallid ; apex of tibia and claws pale red-brown. 



Abdomen. — White, transparent contents visible. 



Minor Worker. 



Measurements. — Total length, 5 to 6 mm. ; head-width, 

 1"5 mm. 



Like major worker but paler; with ocellus-like, pale, oval 

 spots near cephalo-lateral extremities of arms of Y-suture. 



