236 



W. A. SANDS 



medial spot, dark sepia-brown, oval, flat, equal in size or larger than fontanelle; postclypeus 

 sepia-brown, labrum yellow-brown; frontal marks indistinct, flat, coloured as head; antennae, 

 pale brown, pronotum, sepia-brown, meso- and metanota pale brown, without dark sutures; 

 legs, femora and tibiae pale brown, tarsi, yellowish-white. Abdominal tergites, sepia-brown, 

 dorsal stigmata yellowish white; sternites, brown laterally, very pale brown in middle, ventral 

 stigmata, as dorsal, cerci, yellowish white. 



Posterior margin of head capsule slightly unevenly rounded; ocelli medium-sized, separated 

 from compound eyes by about two-thirds own least diameter; postclypeus large and moderately 

 inflated, Pcl/W index, 0-25-030, hind margin evenly rounded, median suture distinct. 



Pilosity of head capsule uneven with many long setae, not forming a pelt, brown. 



Measurements (13 specimens from seven localities) in millimetres. 



Range Mean ± S.D. 



084-1 01 0922 ± 0061 



006-009 X 009-013 0076 ± o-on x o-ioi ± 0012 



Head width across eyes (W) 

 Ocellus (O w xOi). 

 Ocellus to eye (O-E) . . 0-04-0-06 



Postclypeus length (Pel) . 0-21-0-30 



Antennal article III . . 0-01-0-03 



Antennal article IV . . 004-005 



Antennal article V . . 0-03-0-04 



Left mandible, apical to first 



marginal (L A ) . . . 006-010 



Left mandible, first to third 



marginal (Li) . . . 0-14-0-17 



Left mandible, third marginal 



to molar (L m ) . . . 0-06-0-08 



Right mandible, apical to first 



marginal (Ra) ■ • • 0-07-0-10 



Right mandible, first to second 



marginal (Ri) . . . 0-01-0-13 



Right mandible, second mar- 

 ginal to molar (R m ) . . 0-06-0-08 

 Mesonotum width (M) . . 0-14-0-19 

 Metanotum width (N) . . 0-15-0-22 



0-052 ± 0006 

 0264 ± 0028 

 0-017 i 0004 

 0042 ± 0-003 

 0039 ± 0003 



OO79 ^ 0-OI2 



0157 4_: OOI2 



0-072 4j- 0-007 



0-086 ± 001 1 



o-iio ^ o-on 



0-074 ± 0-005 

 0-162 J- 0016 



0-183 ± 0-022 



Worker. Head capsule yellowish white, setae fine short, yellow. Postclypeus moderately in- 

 flated, Pcl/Ri, 2-14-2-94. Pcl/W, 0-27-0-34; left mandible with proximal end of subsidiary 

 marginal tooth just clear of molar prominence. Fore tibia strongly inflated, Ti/T w , 333-370. 

 Mixed segment of gut length 3-4 times width of mesenteron at insertion of malpighian tubules ; 

 enteric valve seating sessile on second pouch of proctodeum, weakly three lobed; internal 

 cushions, proximally weakly scaly, distally reticulated, sometimes with very small marginal 

 points; membrane beyond cushions with sparse rows of minute spicules. 



Measurements (six specimens from six 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 m ) 





Range 



Mean ± S.D. 





0-69-0-75 



O-729 ± 0-022 





0-14-0-15 



OI49 ± OOO3 





050-053 



0514 ± OOI 3 





0-19-0-25 



0-231 4_: 0-023 





0-06-0-08 



0-070 4j 0006 





0-11-0-13 



0-120 4j 0005 





— 



0-051 ± 0-002 





0-06-0-08 



0-071 4_; 0-006 





— 



0-088 ± 0003 



m ) 



— 



0050 ± 0002 



