WHEELEK: the ants of BORNEO. 127 



*208a. PoLYRHACHis (Myrmothrinax) thrinax Roger var. 



JAVANICA Mayr. 



Polyrhachis thrinax var. javanica Mayr, Tijdschr. ent., 1867, 10, p. 20, ^ . 



Type-locality: Java (Mus. Holm.). 



Three workers from Kuching (John Hewitt). 



209. Polyrhachis (Myrmothrinax) aequicuspis, nora. nov. 



Polyrhachis constructor Smith, Cat. Hymenop. Brit, mus., 1858, 6, p. 68, 9 , 

 pi. 4, fig. 23 {:nec P. constructor Smith, Journ. Proc. Linn. soc. London. 

 Zool., 1857, 2, p. 60). 



Type-locality: Sarawak, Borneo (Saunders Coll.). 



It seems not to have been noticed that Smith gave the name con- 

 structor to two very different species of Polyrhachis. In 1857 he 

 described a P. construcior from a female specimen taken by A. R. 

 Wallace at Sarawak. This specimen measured 3| lines and had the 

 petiole "quadrate, with two very stout, short, curved spines above" 

 and the body covered with "short, silky, ashy pile, most apparent 

 on the abdomen." In 1858 he gave the same name to a female from 

 the same locality but from the W. W. Saunders Collection, measuring 

 4| lines, with the " node of the petiole incrassate and with three stout, 

 short, acute spines." The figure accompanying this description 

 shows that he had befqj'e him a species of Myrmothrinax, with sub- 

 equal petiolar spines, possibly the form afterwards called thrinax var. 

 jaxanica by Mayr. It therefore becomes necessary to change the 

 name of the second constructor. The first ■wall have to be consigned 

 to the species of Polyrhachis inccrtae sedis for the present {vide infra 

 p. 137). 



*210. Polyrhachis (Myrmothrinax) triaena, sp. nov. 



Worker. Length 6.5-7 mm. 



Head a little longer than broad, a little broader behind than in front, with 

 evenly rounded and convex occipital border and straight sides; very convex 

 dorsally in the frontal region. Eyes large and convex, broadly elliptical, 

 their anterior orbits at the median transverse diameter of the head. Mandi- 

 bles very convex, with five large, subequal teeth. Ch-peus carinate, broader 



