192 W. A. SANDS 



All the necessary comparisons of the single species are made under the generic 

 heading. It only remains to add that there is no sign of the abdomen being dehiscent 

 in this genus. 



Holotype queen, paratype king, and worker from type-colony, Democratic 

 Republic of Congo: Katanga, Keyberg, near Elizabethville, 23.lv. 1948 {A. E. 

 Emerson), in American Museum of Natural History. 



Other paratype material. Locality as above: 22. iv. 1948 (A. E. Emerson), queen 

 and workers, in AMNH. 



These nest-series were both collected from Cubitermes mounds in seasonally 

 flooded areas 'Dambo' in the typical Brachystegia-Isoberlinia woodland of the area. 



ANENTEOTERMES gen. n. 



(An — 'without', enteon, Gr., 'fighting gear') 



Type-species: Anenteotermes disluctans sp. n. 



Imago. Very small, to medium sized, W, 065-1 06. Fore tibia with three apical spurs, 

 third well developed. Apical teeth of mandibles short to moderately long, La/Lj, 0-42-076, 

 Ra/Ri, 062-1 00; subsidiary marginal tooth of left mandible with proximal end just clear to 

 distinctly clear of molar prominence in surface view, complex ratio, La/Li. L m , 6-73-15-92. 

 Right mandible with points of apical and marginal teeth in line, or first marginal retracted 

 behind line from apical to second marginal; anterior edge of first marginal longer than that of 

 second, equal to it, or shorter. Meso- and metanota narrow to fairly wide at constriction, 

 only one species wider, M/W, 0-19-0-31 (0-26), transverse dark sutures usually present but not 

 strongly developed; complex ratio of mandible and notal measurements, Lj/M.N, 1-70 (3-11)- 

 5-51 (figures in parentheses represent limits of range excluding single 'unusual' species). 



Worker. Very small to medium sized, W, 0-56-0-84. Fore tibia moderately to scarcely 

 swollen, Ti/T w , 358-500 with three apical spurs, third smaller than other two, vestigial in 

 only one species. Apical teeth of mandibles short to moderately long, L A /Li, 0-46-0-73, R A /Ri, 

 0-54-0-89; subsidiary marginal tooth of left mandible with proximal end just clear of molar 

 prominence to widely separated in surface view, complex ratio, La/Li. L m , 9-15-18-52. Right 

 mandible with point of first marginal slightly to distinctly behind line from apical to second 

 marginal ; anterior edge of first marginal equal to or shorter than that of second, usually shorter, 

 complex ratio, Ra/Ri Rm, 11-61-21-60. Mesenteric junction with proctodeum overlapping, 

 elongated to form a distinct mixed segment, proximal end of proctodeum well to left of mal- 

 pighian knot. Enteric valve seating weakly two- or three-lobed, third usually smaller, sessile 

 or with short neck connecting it to second pouch of proctodeum, lateral to dorsolateral in 

 unopened abdomen; internal cushions of enteric valve retracted or produced through valve 

 opening, sometimes elongated and sclerotized, surfaces scaly or armed with small to elongated 

 spines, the latter sometimes pectinate. 



The most important distinguishing feature of this genus is the mixed segment 

 of the worker gut. This character is only found in this highly developed form in 

 two other genera, namely Aderitotermes and Adaiphrotermes. In the latter case 

 the swollen termination of the mesenteron and lack of a third spur on the fore tibia 

 are diagnostic. Aderitotermes is larger, and the mixed segment is longer. The 

 enteric valve seating has three prominent and equal lobes and is far dorsal in position 

 in the unopened abdomen. Nevertheless, there is probably a distinct relationship 



