86 loiiMieiD.t. 



Knj to the S^ieeies. 



A. Node of the pedicel convex in front; the 



u])|ier puition of the posterior face bevelled 

 off towards the front. 

 (I. Leugtli fiver 9 nun. 



a'. Abdomen finely and closely punctured, 



opaque, not shining- J^. ns/iifi(f!, p. 80. 



b'. Abdomen i^mooth, highly polished and 

 shining. 

 a'. jNIandibles with 10 or 11 small teeth. E.java)tus, p. 8(i. 

 h'-. Mandibles with only 7 comparatively 



large teeth ". E. maternus. p. 87. 



b. Length under 6 mm. . E. annamitus, p. 87. 



B. Node of the pedicel not bevelled, flat and 



truncate anteriorly and posteriorly E. Icfnavenhoeki, p. 88, 



104. Ectomomyrmex astutus, Smith (Pachychondvla), Cat. vi (18")8), 



p. 107, ?. * . 



Ectomomvrmex snndaicus, Mayr, Tijds. v.Ent. x (1807), p. 85, ^ ; 

 Forvl. Jour. Bomb. N. H. Soc. xiii (1900), p. 32l, ^ . 



^ . Black, the niaudibles and the tibice and tarsi of the legs 

 deep castaneous red; the head, thorax and abdomen covered with 

 short erect reddish-yellow hairs and a line thin sericeous recumbent 

 pubescence, visible only in certain lights. Head very finely and 

 closely striate, the striae diverging posteriorly from a medial line ; 

 the emarginate portion of the occiput smooth and shining, with a 

 few oblique strisp in the middle ; the lateral angles of the head 

 acute. Thorax : the pronotum convex above, narrowed anteriorly 

 into a neck, closely finely striate, the striae concentric ; meso- and 

 metanotmn somewhat more coarsely longitudinally striate, the 

 basal portion of the metanotum short, not longer than the apical 

 slo])ing portion, the latter seen from the back subcordate in shape, 

 widening in the middle, finely longitudinally striate ; legs mode- 

 rately long, robust. jS^ode of the pedicel rugose above, transverse, 

 striate in front ; abdomen very finely and closely punctured, 

 opaque, and bearing scattered piligerous points, the apical margins 

 of the 2nd and succeeding segment very narro\\- and obscurely 

 reddish. 



Length, ^ 12-5-13 mm. 



Hah. Assam (/"Smj/thies) ; Burma ; Tenasserim (Fea cf- Bingham); 

 extending to Australia. 



1 have compared specimens of E. siaidaicKS, Mayr, named by 

 Dr. Forel, with the type of Pachyclwndyla astuta, Smith, in the 

 British Museum, and there cannot be the shadow of a doubt as to 

 their identity. 



105. Ectomomyrmex javanus, Mai/r, Tijd.<.r.Ent.x (1867), p. 84, $; 



Forel, Jour. Bomb. N. H. Soc'. xiii (1900). pp. 321 & 322, ^. 



'^ . Resembles E. sumlaicus, but is smaller, with the sculpture 

 of the thorax and abdomen different. Black ; the mandibles, 

 antenna? and legs, except the anterior and intermediate coxje, 



