180 W. A. SANDS 



Worker. Head capsule pale yellow, pilosity sparse, yellow. Postclypeus moderately 

 inflated, Pcl/W, 0-27. Apical teeth of mandibles fairly long, L A /Li, 0-74, R A /Ri, 093; subsidiary 

 marginal tooth of left mandible with proximal end just clear of molar prominence in surface 

 view, complex ratio, LA/Li.L m , 14-41; point of first marginal tooth of right mandible distinctly 

 behind line of apical to second marginal, anterior edge of first marginal slightly shorter than 

 that of second, Ra/RiRiti, 1480. Fore tibia scarcely swollen, Ti/T w , 5-05, third apical spur 

 short, about one-quarter length of other two. Mesenteric junction with proctodeum distinctly 

 longer than diagonal; enteric valve nearly sessile on second pouch of proctodeum, dorsolateral 

 in unopened abdomen; enteric valve cushion in position 1 sclerotized throughout its length, 

 half of which protrudes beyond tips of spines of other positions, dilated end fringed with 25-28 

 (average 267) elongated spines, outer half of shaft, and concave surface of dilated end with 

 scattered small spines, base of shaft wrinkled transversely; cushions in other positions with 

 3-8 (average 5-3) elongated slender slightly curved spines, hooked at tips, but not with com- 

 pletely recurved hooks, and smaller spines on rest of length ; membranous wall of valve between 

 and beyond cushions without detectable spicules. 



460 



Figs 454-461. Ateuchotermes, imago mandibles, 454, 455, A. retifaciens; 456, 457, 

 A. sentosus; 458, 459, A. spinulatus; 460, 461, A. tranquillus. 



