60 HYMENOPTERA. 



8. POLYRHACHIS LACTEIPENNIS. PI. IV. fig. 40. B.M. 



Female. Length 3^ lines.— Opake-black, the wings milky- 

 white. The clypeus eraarginate in front, with a smooth shining 

 line down the centre ; a similar line runs upwards from the base 

 of the clypeus, not quite extending to the anterior stemma. 

 Thorax ovate, with the lateral angles of the prothorax acute ; 

 the metathorax armed at the lateral angles with a short stout 

 acute tooth ; the wings milky-white, the nervures pale testaceous, 

 the stigma pale brown. Abdomen subglobose ; the scale of the 

 peduncle incrassate, subquadrate, with a long curved stout acute 

 tooth at each superior lateral angle, the centre of the margin 

 between the spines emarginate. 



Hab. Northern India. 



9. POLYRHACHIS PILIVENTRIS. PI. IV. fig. 24. B.M. 



Female. Length 3| lines.— Black : the head and thorax sub- 

 rugose; abdomen smooth, shining, and covered with a fine cine- 

 reous pile. The mandibles triangular, with four or five sharp 

 teeth on the inner edge which are rufo-piceous ; the anterior 

 margin of the clypeus rounded. Thorax oblong-ovate, the meta- 

 thorax truncate ; wings fulvo-hyahne, the nervures rufo-testa- 

 ceous; the apical joints of the tarsi rnfo-testaceous. The scale 

 of the abdomen inci-assate, subquadrate, with a stout spine at 

 each of the superior angles, cm-ving slightly inwards. Abdomen 

 subglobose. 



Hab. Singapore. (Coll. A. Wallace.) 



10. POLYRHACHIS DIVES. PI. IV, figs. 32, 33. B.M. 



Worker. Length 2^ hues. — Black : clothed with pale golden 

 pubescence ; the thorax with two short curved spines in front, 

 and two of about the same length on the metathorax ; the sides 

 of the thorax nearly parallel, very slightly widest in front ; the 

 scale of the abdomen compressed, square anteriorly, and fur- 

 nished with two long spines curved backwards. The pubescence 

 on the head and thorax obscurely golden; the legs without 

 spines or pubescence, the calcaria pale testaceous. 



Hab. Singapore. 



11. POLYRHACHIS FLAVICORNIS. 



Female. Length 3 lines. — Black : the head and thorax sub- 

 opake ; the abdomen shining and slightly fuscous. The flagellum, 

 except the basal joint, reddish-yellow ; the scape rufo-piceous. 

 Thorax ovate ; the legs rufo-piceous, the femora pale reddish- 



