FASCICULI MALATENSES 



33 



POLYRHACHIS, Smith 



46. Polyrhachis bihamata 



Formica bihamata, Drury, TIL Nat. Hist, ii, 1773, p. 73, pi. xxxviii, figs. 7, 8. 

 Formica affinis, Le Guil/on, Ann. Soc. Entr. Fr. x (1841), p. 314. 

 Polyrachis bihamata, Smith, Journ. Linn. Soc. ii (1857), p. 58, pi. i, fig. 9, $ . 



Mabek, Jalor. July. 

 Bukit Besar, Nawngchik. 2,500 feet. September. 



Found throughout the Malayan sub-region : extending to Madagascar. 



47. Polyrhachis ypsilon 



Polyrhachis ypsilon, Emery, Ann. Mus. Civ. Gen. xxiv (1886), p. 239, $ . 



GeJong, South Perak. January. 



Recorded from the Malayan sub-region and from Ceylon. 



48. Polyrhachis armata, var. defensus 



Formica armata, Le Gui//., Ann. Soc. Ent. Fr. x (1841), p. 313, $. 

 Polyrhachis armata, Forel, Journ. Bomb. N. H. Soc. viii (1893), pp. 26, 34, $ • 

 Found also in Burma ; Tenasserim ; Sumatra ; and Java. 



49. Polyrhachis laevissima 



Polyrhachis laevissima, Smith, Cat. Hym. Brit. Mus. vi (1858), p. 64, pi. iv, 



fig. 42, g . 



Biserat, Jalor. October. 



' A very common species at Biserat and also on Cape Patani. At the 

 former locality a nest containing many winged individuals was noted in 

 October. It was in a bamboo which had been cut off in an internode in 

 building a shed. The open end of the cylinder thus exposed, which lay 

 horizontally, was filled in, except for a small aperture above, with a curtain 

 of stout silk interwoven with fragments of bamboo produced by beetles 

 burrowing in the wood. Close to this nest was a clump of acacias, which 

 produced a sweet substance from glands on the leaf-stalks. This was 

 evidently a source of attraction both to the ants and to several other insects. 

 Attidae, apparently belonging to several species, were taken, which appeared to 

 mimic this ant, both on these acacias at Biserat and on other shrubs at 

 Jambu and Cape Patani. Though they were generally found in the 

 immediate vicinity of the insects, a mutual distrust appeared to exist, and an 

 ant which was put into a glass tube with one of the spiders was immediately 

 paralysed by a bite. It was noticed that the spiders were about earlier in the 

 day than the ants, which stayed in their rest until the sun had dispelled the 

 night mist — that is to say, until between nine and ten a.m.' 



