E TillOI'IAX N ASTJ T I T E R M IT I N A E 



93 



Head width across eyes 

 Greatest diameter of eye 

 Ocellus 

 Ocellus to eye 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 

 Length of fore wing 



Range Mean 



178-203 . . i-88 



0-59-072 . . 065 



0-20-026 X O24-O34 . . 0-22 X O -' 7 



002-006 . . OO5 



1-60-1-89 • • I 76 



I OO- I l8 . . I IO 



2-43-2-80 . . 258 



17-90-21-90 . . I99O 



Soldiers. Major soldier : head capsule ferruginous orange to dark sepia brown, commonly 

 ferruginous to chestnut brown, nose chestnut brown to pitch black, with red tip. Pronotum 

 and antennae yellow-brown, meso- and metanota pale yellow -brown, legs yellow. Abdominal 

 tergites pale brown to sepia brown, sternites pale yellow. 



Head capsule in plan view short oval, circular, or slightly \\ Lder than length, nose conical. In 

 profile near straight to distinctly concave, with back of head rising from above antenna] socket, 

 and rounded ; nose equal in length to distinctly shorter than rest of head capsule, measuring 

 from hind margin of antennal socket, angle of nose cone, 8-22 degrees ; antennae 14 segmented, 

 proportions of basal segments somewhat variable with size, usually II and V subequal, 111 and IV 

 subequal and longer than II and V. Head setae confined to hairy nose tip ; dorsal surface of 

 head capsule without prominent setae. 



Middle abdominal tergites with scattered minute setae, distinctly visible in profile, posterior 

 tergites with longer setae. Sternites with short backwardly directed scattered setae, and longer 

 downward or slightly forward directed setae on posterior margins, arranged approximately in 

 longitudinal rows 3 on each side of mid-line of abdomen, longer setae about 2-3 times length of 

 shorter. 



Minor soldier : Colour as darker specimens of major soldier, antennae 13- 14 segmented, 

 proportions of basal segments variable. 



Measurements (Major soldiers, 57 specimens from 13 localities, minor soldiers, 8 specimens 

 from 5 localities). 



Range Mean 



2-172-64 .... 240 



1 17-173 . . . . i-45 



0-84-1-22 . . . . 1 02 



0-56-0- 75 .... 068 



0-25-0-36 .... 032 



1 -57-2-19 . . . . 1-84 



Range Mean 



1 -51-2-04 .... 170 



059-1 00 .... 075 



049-077 .... 060 



0-38-0-51 .... 0-47 



0-20-0-26 .... 023 



1-40-1-76 . . . . 1-59 



Variation. The full range of variation in colour and form in both imagos and soldiers is some- 

 times found within a comparatively restricted locality. On the other hand, specimens from the 

 extremes of the geographical range, over 3,000 miles apart, are clearly of the same species, and 

 no character clines have been detected, though a tendency has been noticed for specimens from 

 the moister parts of West Africa to be darker in colour. 



T. geminatus in some of its forms, very closely resembles its sympatric congeners, 

 T. oeconomus and T. trinervius. It is readily distinguishable from T. oeconomus in 

 the $ imago by the much smaller abdominal " scent " gland and the shorter cerci, 



Major Soldiers 



Head length to tip of nose 

 Head width . 

 Depth of head capsule 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



Minor Soldiers 



Head length to tip of nose 

 Head width . 

 Depth of head capsule 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



