136 W. A. SANDS 



of molar prominence in surface view, complex ratio, La/LiLhii 10-41-12-04. Points of apical 

 and marginal teeth of right mandible in line, anterior edge of first marginal longer than that of 

 second. Meso- and metanota narrow at constriction, M/W, 0-21-0-24, transverse dark sutures 

 absent. 



Worker. Large, \V, 0-86-0-94. Fore tibia scarcely swollen, Ti/T w , 5-00-5-53, with three 

 apical spurs, third about one-third length of other two. Apical teeth of mandibles very long, 

 La/Li, 0-97-1-00, Ra/Ri, 1-25-1-29; subsidiary tooth of left mandible with proximal end level 

 with edge of molar prominence in surface view, complex ratio, La/Li. Lm, 25-81-26-66; points 

 of apical and marginal teeth of right mandible in line, anterior edge of first marginal longer 

 than that of second, complex ratio, R A /RiRm, 25-40-30-25. Mesenteric overlap at junction 

 with proctodeum twice width of mesenteron at insertion of malpighian tubules or a little more, 

 proximal end of proctodeum within malpighian knot, towards left side. Enteric valve seating 

 with two very weak lobes, connected to second pouch of proctodeum by very short neck, 

 ventral in position in unopened abdomen ; internal cushions of enteric valve without armature, 

 surface scaly. 



This is again a monotypic genus, slightly related to Adynatotermes, and perhaps 

 to some species of Astalotermes, but readily recognizable by its long mandibular 

 apical teeth. In this respect it resembles the next genus, Acholotermes, but the 

 meso- and metanota of the imago are narrower, and the ocelli much more distant 

 from the compound eyes. In the worker, the enteric valve seating has a much 

 shorter neck, and is more ventral in the unopened abdomen. The only other genera 

 with equally long apical teeth are Asagarotermes and Amicotermes. In the imagos 

 these have the left subsidiary marginal tooth clear of the molar prominence, the 

 ocellus closer to the eye, and a more inflated postclypeus. The workers of these 

 genera each have uniquely characteristic enteric valve armature. In the results 

 of the analysis of the similarity matrix, the principal co-ordinates place Agano- 

 termes near the rather large, loose cloud of points that form the genus Astalotermes, 

 and fairly close to Adynatotermes. The cluster analyses both bring it out very late, 

 remaining independent in the single linkage down to the 78% phenon level, joining 

 after Astalotermes obstructus and before another monotypic genus, Amicotermes. 

 When clustered by median sorting, it remains unattached until the last five places, 

 four of which form monotypic genera, at the 70% phenon line. In the canonical 

 variates analysis based on measurements alone, Aganotermes is one of the most 

 isolated genera. 



Aganotermes oryctes sp. n. 



(Text-figs 327-33 6 ; PI- 2 - n g- I2 ) 



Imago. Head capsule sepia-brown to very dark sepia-brown, definitely darker above ocelli, 

 dark often extending as tapering streaks converging to fontanelle; fontanelle very small, oval, 

 depressed, coloured as head capsule; medial spot as large as or larger than fontanelle, oval, 

 paler than head capsule, raised on distinct bump; postclypeus, slightly paler than head capsnle, 

 labrum, yellow-brown to brown, frontal marks semicircular, flat, paler than head; antennae 

 yellow-brown to sepia-brown. Pronotum, brown to dark sepia-brown, meso- and metanota 

 brown; femora pale yellow-brown to brown, tibiae paler, tarsi yellow. Abdominal tergites 

 brown to sepia-brown, dorsal stigmata darker, sternites brown, paler in mid-line, stigmata 

 darker; cerci very pale brown. 



Posterior margin of head capsule not quite evenly rounded, slightly undulating ; ocelli rather 

 small, separated from compound eyes by much more than own least diameter; postclypeus 



