BV GERALD F. HILL. 455 



on rostrum, rt-iiuiinder of head almost bare. Antennae (Fig. 53) very long (3.10) 

 and slender. 15-jointed (rarely 14-jointed), 1st joint more than twice as°long as 

 2nd, 2nd shortest, 3rd and 4th generally subequal, or 3rd sometimes markedly 

 longer than 4th, 5th a little longer than 4th, slightly turbinate like succeeding 

 joints, 6th longer than 5th, 7th and 8th longer, subequal, 9th, 10th, 11th and 

 12th longest of all, twice as long as 2nd, 13th and 14th shorter, subecjual, equal 

 to 6th, 15th shorter than 14th, as long as 4th, 16th shorter than 15th, bluntly 

 rounded at apex. 



Thorax with shining, minutely-wrinkled surface, clothed vei-y sparsely with 

 very small setae invisible under hand lens. Pronotum: Saddle-shaped anterior 

 margin with a few minute setae, othei-wise bare ; antei-ior margin bent up sharply, 

 bilobed in front, very dark in colour, antero-lateral angles rounded, sides sloping 

 to the nearly round posterior margin; posterior half broadly margined with 

 mummy brown, median suture and small spot in middle pale. Mesonotum 

 reniform, a little narrower than pronotum. half as long as wide. Metanotum 

 much wider but shorter than mesonotum. nearly tliree times as wide as long. 



Legs very long and slender, almost cylindrical, as dark as thorax when 

 viewed from above, sparsely clothed with short fine setae. 



Abdomen very little contracted at base and not markedly wide in middle, 

 rounded at apex; apices of tergites with a few short fine setae, remainder 

 clothed with minute setae. Cerei very long and slender. 

 Measurements : 



Total length 4.50. 



Head, long 1.88; wide 0.987. 



Pronotum, long 0.330; wide 0.564. 



Tibia i. 1.410; ii. 1.457; iii. 2.021. 



Abdomen, wide 1.175. 



Worker. (Fig-s. 54-56.) 



Colour: Head sepia, with clear median suture extending from the posterior 

 margin to the fontanelle, where it divides in the shape of the letter "U," each 

 arm extending laterally across the head to a clear area lying midway between 

 tlie posterior margin of the antennal fossae and the fontanelle; clypeus buffy 

 brown; labruni yellow, thorax and abdomen slightly paler than in soldier; legs 

 whitish. 



Head (Fig. 54) moderately large, almost hairless, rounded behind and on 

 the sides, widest in front, flat on the summit. Clypeus twice as wide as long, 

 strongly convex behind, truncate in front, with obscure median suture. Ante- 

 clypeus hardly visible. Labrum narrow at base, swollen on tlie sides, truncate in 

 front, not quite covering the apical teeth of mandibles. Mandibles (Fig. 55). 

 Antennae (Fig. 56) long and slender, 17-jointed, 3rd joint shortest of all, 4th 

 and 5th subequal, 6th much longer. 



Thorax very similar to that of soldier, a little paler in colour. 

 Legs long and slender, with sparse clothing of fine setae. 

 Abdomen sliort and narrow, with dark tergites, as in soldier. Cerei of 

 moderate length. 

 MeasHrements: 

 Total leng-th 5.50. 



Head from base to posterior margin of clypeus, long 1.269; wide 1.504. 

 Pronotum, long 0.517; wide 0.799. 

 Tibia i. 1.316; ii. 1.410; iii. 2.068. 

 Abdomen, wide 1.05. 



