156 W. A. SANDS 



from sides of head. Pilosity very fine and sparse with very few more prominent setae, three over 

 each eye, two pairs on vertex and one pair on postclypeus. Pronotum, sides converging pos- 

 teriorly, length less than two-thirds width. 



Soldier. Monomorphic. Nose thin, cylindrical, tapering to fine point. Vestigial mandibles 

 without points, labrum with regular rounded anterior margin. Head capsule scarcely con- 

 stricted behind antennae, weakly humped at base of nose. Antennae 12 segmented. Head 

 setae confined to bilaterally placed pair on vertex, one or two pairs near base of nose, and few at 

 nose tip. Abdominal tergites with scattered short setae one-third length of longer setae on 

 posterior margins, sternites with scattered short setae longer than on tergites and half length 

 of longer setae on posterior margins. 



Worker. Left mandible with apical tooth much longer than first marginal, distance between 

 them, nearly three times that from first to third marginals (left mandible index 2-63), cutting 

 edge between the latter entire, concave, gap between third marginal and molar prominence 

 very narrow ; right mandible, apical and first marginal as left, second marginal absent, molar 

 plate with weak basal indentation of outline, weak anterior and strong posterior rounded flanges, 

 and no ridges. 



Emerson (i960) considered this genus to have been derived from close to Afro- 

 subulitermes and I agree with this, particularly since the recently discovered imago of 

 the latter shows close similarities of shape and appearance to Postsubuliterm.es. The 

 imago and worker mandibles of Postsubulitermes are more specialized, and the soldier 

 has an evenly rounded labrum, which is a further reduction of the tri-lobed shape seen 

 in the more primitive members of the group, such as Eutermellus. The other genera 

 are distinguishable by many characters, and are unlikely to be confused with 

 Postsubulitermes. 



Postsubulitermes parviconstrictus Emerson 

 (Text-figs. 412, 413, 437-439. 464-466, 489 ; Map 31) 



Postsubulitermes parviconstrictus Emerson, i960 : 13. Type locality : Congo, Yangambi. 



Material. Congo : Yangambi, o° 47' N., 24 ° 23' E., 20. v. 1948 (A. E. Emerson), 

 holotype and paratype soldiers and morphotype queen ; Camp Putnam, 1° 24' N., 

 28 36' E., 13.V.1948, 4km. N. of Camp Putnam 19 and 20. v. 1948 (A. E. Emerson), 

 paratype soldiers, A.M.N. H. and B.M.(N.H.). 



VERR UCOSITERMES Emerson 



Verrucositermes Emerson, i960 : 3. Type-species by original designation, Verrucositermes 

 tuberosus Emerson, i960. 



Imago. The morphotype king of V. tuberosus is unique and the mandibles have not been 

 dissected. The worker mandibles in this group are particularly closely similar to the imago and 

 are described below. Postclypeus moderately inflated, width 2-5 times length, anterior margin 

 concave, sinuate. Fontanelle a pale streak, tapering and slightly depressed posteriorly. Eyes 

 set slightly out from sides of head and undercut at rims. Pilosity of head fine and uniform with 

 a few more prominent setae. Pronotum, sides converging posteriorly, length less than two- 

 thirds width. 



Soldier. Monomorphic. Nose thin, cylindrical, tapering to fine point. Vestigial mandibles 

 without points but angular in outline, labrum with sinuate anterior margin. Head capsule 



