THE SOLD1ERLESS TERMITES OF AFRICA 



^33 



Measurements (25 specimens from 14 localities) in millimetres. 



Range 

 0-71-0-96 

 -009 x 008-012 

 003-006 

 0-18-0-25 

 001-003 

 003-005 

 002-004 



Head width across eyes (\V) . 



Ocellus (O w x Oi) . . . 006 



Ocellus to eye (O-E) 



Postclypeus length (Pel) 



Antennal article III 



Antennal article IV 



Antennal article V. 



Left mandible, apical to first 



marginal (La) • . • 005-0-08 



Left mandible, first to third 



marginal (Li) . . . 009-015 



Left mandible, third marginal 



to molar (L m ) . . . 005-007 



Right mandible, apical to first 



marginal (Ra) • • • 0-05-0-08 



Right mandible, first to second 



marginal (R|) . . 0-07-0-10 



Right mandible, second mar- 

 ginal to molar (R m ) • • 005-008 



Mesonotum width (M) . . 0-13-0-21 



Metanotum width (N) . . 0-14-0-21 



Mean ± S.D. 

 0-872 ± 0-063 

 0-072 i 0-007 x °"°95 ± o-oio 

 0044 ± 0009 

 0-222 ± 0021 

 0-015 i 0-004 

 0032 ± 0006 

 0030 ± 0006 



0067 ± 0009 



0-131 ± 0016 



0061 i 0006 



0073 i 0009 



0091 ± 0010 



0065 ± 0007 

 0176 ± 0024 

 0182 i 0020 



Worker. Head capsule white, pilosity short and fine, pale yellow. Postclypeus moderately 

 inflated, Pcl/Ri, 2-50-3-40, Pcl/W, 0-27-0-34; left mandible with proximal end of subsidiary 

 marginal tooth just clear of molar prominence. Fore tibia inflated, Ti/T w# 3-54-4-00. Mixed 

 segment of gut very long, length 7-8 times width of mesentcron at insertion of malpighian 

 tubules; enteric valve seating a sessile circular rim on second pouch of proctodeum, completely 

 hidden under folds of rectum in dorsal view of abdomen ; internal cushions smooth with no trace 

 of scales or reticulations, membrane beyond cushions with vestigial spicules. 



Measurements (nine specimens from nine localities) in millimetres. 



Head width (W) . 



Fore tibia width (T w ) . 



Fore tibia length (Ti) 



Postclypeus length (Pel) 



Left mandible, apical to first marginal (La) 



Left mandible, first to third marginal (Li) 



Left mandible, third marginal to molar (L m ) 



Right mandible, apical to first marginal (Ra) 



Right mandible, first to second marginal (Ri) 



Right mandible, second marginal to molar (R 



Adaiphrotermes choanensis shows a remarkable degree of variation in the imago 

 caste, such that it was at first divided into two species. However, intermediates 

 between the forms were found and it became clear that the differences were associated 

 with collections made in different years. It happened that the greater part of the 

 material available for study was collected in batches of a number of nest-series from 

 various localities in the years 1955, 1959, i960 and 1962. There was a steady 

 increase in size from the earlier to the later collections, coupled with an enlarging 





Range 



Mean ± S.D. 



• 0-59-0-73 



0627 ± 0-049 





0-12-014 



0129 ± 0006 





0-44-0-53 



0-488 ± 0027 





0-18-0-24 



0-202 ± 0-021 





005-007 



OO59 ± OOO7 





009-01 1 



OI02 i OOO7 





004-005 



0-044 i 0-004 





004-007 



0-059 ± 0008 





0-06-0-08 



0-067 ± 0-005 



a) 



004-006 



0048 i 0-005 



