

W. A. 



SANDS 





Right mandible, second 



marginal to 







molar (R m ) 







005 



Mesonotum width (M) 







014-016 



Metanotum width (N) 







015-016 



216 



0146 



0157 



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

 inflated, Pcl/W, 0-27-0-31, Pcl/Ri, 2-20-275. Apical teeth of mandibles fairly long, La/Li, 

 0-69-073, R A /Ri, 0-82-0-88; subsidiary marginal tooth of left mandible just clear of molar 

 prominence in surface view, complex ratio, L A /Li.L m , 14-81-16-20; point of first marginal 

 tooth of right mandible, distinctly behind line of apical to second marginal, anterior edge of 

 first marginal much shorter than that of second, Rx/Ri-Rmi 20-50-20-70. Fore tibia moderately 

 swollen, Ti/T w , 3-61-3-78, third apical spur about half length of other two. Mesenteric overlap 

 with proctodeum rather more than four times as long as width of mesenteron at insertion of 

 malpighian tubules; enteric valve seating sessile on second pouch of proctodeum, without a 

 neck, very weakly two-lobed, dorsolateral in position in unopened abdomen ; internal cushions 

 of enteric valve all more or less equally developed, protruding slightly through valve opening, 

 surface scaly, scales in posterior one-third of length of cushion developed into small to pro- 

 nounced spines; membranous wall of valve between and beyond cushions with rather numerous 

 minute spicules. 



Measurements (two specimens from separate localities) in millimetres. 



Head width (W) . . . . 0-56 



Fore tibia width (T w ) . . . o-io 



Fore tibia length (Ti) . . . 0-38 



Postclypeus length (Pel) . . . 0-15-018 



Left mandible, apical to first marginal 



(L A ) 006 



Left mandible, first to third marginal 



(L,) 0-08 



Left mandible, third marginal to 



molar (L m ) ..... 0-05 



Right mandible, apical to first mar- 

 ginal (Ra) ..... 006 



Right mandible, first to second mar- 

 ginal (Ri) ..... 006-007 



Right mandible, second marginal to 



molar (R m ) ..... 0-04 



The smallest species of the genus, A. nanus has already been compared with all 

 the remaining members other than A. polyscolus. The latter species has longer 

 apical mandibular teeth in both castes, a more conspicuous fontanelle in the imago 

 and in the worker, the fully developed enteric valve armature with cushion position 3 

 elongated and armed with long pectinate spines. The abdomen of the worker 

 caste appears to be dehiscent in A. nanus. 



A lectotype is designated below from among the existing syntype material of 

 A. nanus (Sjostedt). 



Type-material. Eutermes nanus Sjostedt, LECTOTYPE $ imago, paralectotype 

 <$ and $ imagos, and workers from type-colony, Democratic Republic of Congo : 

 Mukumungu, ix.1904 (K. E. Latnan), in Naturhistoriska Riksmuseum, Stockholm; 

 other paralectotypes in AMNH. 



Other material. Democratic Republic of Congo: Camp Putnam, Epulu 

 River, 17.V.1948 (^4. E. Emerson) in AMNH. 



