190 



the frontal groove ; eyes moderately large, situated a little behind 

 the middle of the sides of the head ; no ocelli ; antennae 12-jointed, 

 scape stout, not reaching the top of the head, club of flagelluin 

 formed of the apical three joints and a little shorter than the rest 

 of the flagellum, apical joint nearly equal in length to the pre- 

 ceding two united. Thorax : the pronotuin anteriorly produced 

 into a collar or neck, behind which it is abruptly enlarged and 

 raised, margined anteriorly, with the lateral angles prominent ; above 

 it is flat, strongly constricted posteriorly and obtusely margined at 

 the sides ; the mesonotum narrower than pronotum, with a semi- 

 circular depression between the two, arid laterally in front with 

 two obtuse prominent tubercles ; meso-metanotal suture very 

 distinct, the thorax constricted at that point ; the metanotum also 

 has two large lateral tubercles placed opposite to those on the 

 mesonotum; behind the tubercles the metanotum is obliquely 

 sloped and armed posteriorly with a long acute divergent spine on 

 each side, the spines directed backwards and a little arched at their 

 base ; legs stout, destitute of all tibial calcaria. Pedicel : the 1 st 

 node flat above, seen from the side cuneiform, seen from above a 

 little longer than broad, semicircularly or angularly enlarged on 

 the sides, posteriorly terminating in two stout divergent teeth on 

 the same level as top of node, and pointing backwards ; 2nd node 

 transverse, rounded above, slightly dilated at its anterior angles. 

 Abdomen oval, truncate at base, the 1st segment covering three- 

 fourths of its whole length. (After Andre.) 



222. Atopomyrmex ceylonicus. Emery, Detdscli. ent. Zeit. (1901), 

 p. 114, $. 



$ . Eeddish yellow, the mandibles deeper in colour, the abdo- 

 men with a broad deep brown transverse band ill-defined at the 



Fig. 69. Atopomyrmex ceylonicus, 5 n. Head from front. 



margins, the legs yellow, the articulations ferruginous, the masti- 

 catory margins of the mandibles dark brown ; head, thorax, 

 except the pronotum and apical face of metanotum, nodes of the 

 pedicel above and extreme base of the abdomen regularly but 



