DOLICHODEKUS. IBIDOMYRMEX. 297 



thick at base, transverse above ; abdomen somewhat elongately 

 oval, smooth and shining, very convex above. 



Length, 3-5-4 mm. 



Bab. Sikhirn, up to 7000 ft. (Matter); Burma, Tenasserim 

 (Fea> Bingham), and Siam (Sigg). 



Var. nigricans, Emery, is very dark fuscous, almost black. 

 Yar. glabripes, Forel, is longer, more slender, and has the legs 

 of a light yellowish red and comparatively smooth, without 

 pilosity. 



337. Dolichoderus nioggridgei, Forel, J.A. S. B. lv, 2 (1880), p. 243, 

 j id. Jour. Bomb. N. H. Soc. ix (1895), p. 403, $ . 



. Brownish red, uniform, the mandibles, antennae and legs a 

 shade lighter. Head and abdomen shining, bufc very minutely 

 and closely reticulate-punctate, sparsely pilose and pubescent ; 

 thorax more coarsely punctate and pilose, somewhat opaque. 

 Head oval, as broad posteriorly as in front, ; the cheeks and front 

 very convex ; mandibles triangular, the outer and masticatory 

 margins longer proportionately than in any other Indian species 

 of the genus; clypeus and antennae as in D. fece, only the scape 

 is proportionately Jonger and extends further beyond the top of 

 the head. Thorax short and broad ; the pronotura flat, margiued 

 anteriorly ; the mesonotum much raised and not very distinctly 

 longitudinally sulcate ; the meso-metanotal emargination very 

 deeply marked, the truncate apical portion of the metanotum 

 long and flar, almost vertical ; legs moderately long, robust, and 

 sparsely pilose. Node of the pedicel inclined to the front, slightly 

 convex anteriorly, flat posteriorly, its upper margin rounded ; 

 abdomen broadly oval, not very convex above. 



Length, 2 3-25 mm. 



Hob. Sikhim at 40UO ft. (Moller) ; Assam (Long). 



I am a little in doubt whether I have rightly identified tin- 

 above species. 



Genus IRIDOMYRMEX. 



Formica, pt. Smith, Jour. Linn. Soc.iii (1858), p. 137, $ . 

 Acantholepis, pt., Lowne, Entomologist, ii (1865), p. 332, J. 

 Hypoclinea, pt.,7tf</r, Verh. zool.-bot. Ges. Wien, xx (1870), p.95!>. 

 Iridomyrmex, Mayr, Vcrli. zool.-bot. Ges. Wicti, xii (1862), p. 702. 



Type, /. delectus, Smith, from Australia. 



Range. Both hemispheres. 



$ . Head triangular ; mandibles very broad at the masticatory 

 margin, armed with 7-8 teeth; clypeus triangular, slightly com. \. 

 posteriorly extending slightly up between the antennal carma*. 

 anteriorly transverse; antennal carina) wide apart, short, parallel ; 

 antenna long, the scnpc and fljigellum both slightly cla\ ate, the 

 former extending beyond the top of the head ; front-il area indis- 

 tinct ; eyes of moderate si/.e, placed somewhat forward, about the 

 transverse middle line of the head. Thorax slender, the pro- and 



