82 



Kanara(>Fror/A<on); Ceylon; Assam ; Burma; Tenasserim (Bing- 

 ham), extending to the Malayan subregion. Described originally 

 from Batchian. 



The type is in the British Museum Collection. 



Var. burmanum, Emery, has a few partially obsolete longitudinal 

 striae in the middle of the 2nd abdominal segment. 



Genus ECTATOMMA. 



Ponera, pt., Smith, Jour. Linn. Soc. ii (1857), p. 66, . 

 Ectatomma, Smith, Cat. vi (1858), p. 102, pi. 7. 

 Stictoponera (subgen.), Mayr, Verh. zool.-bot. Ges. Wien, xxxvii 

 (1887), p. 539, . 



Type, E. tuberculatum, Oliv., from Brazil. Of the subgenus 

 Stictoponera, E. coxale, Roger, from Ce}'lon. 



Range. Both hemispheres. Of the subgenus, the Indo-Malayan 

 region. 



. Head oval ; mandibles triangular, the masticatory margin 

 broad, dentate ; clypeus triangular, the apex of the triangle 

 reaching half the way up between the antennal cariuae, which are 

 straight, short, only slightly laminate anteriorly ; antennae 12- 

 jointed, filiform, the scape and the flagellum only slightly incrassate 

 towards their apices ; head posteriorly deeply emarginate, the 

 posterior lateral angles acutely produced. Eyes of moderate 

 size. Thorax short, broad, convex above, rounded anteriorly, 

 slightly compressed posteriorly, and with the apex somewhat 

 concave ; the pro-meso- and meso-rnetanotal sutures not very 

 distinct above; legs short, somewhat slight, the posterior coxae 

 armed with a spine, the femora and tibiae cylindrical, claws 

 simple. Pedicel one-jointed, cylindrical, thick, constricted ante- 

 riorly and posteriorly, not nodiform, dentate beneath ; abdomen 

 oval, short and comparatively broad. The head, thorax and base 

 of abdomen always coarsely rugose-punctate ; the punctures some- 

 times confluent and forming longitudinal ridges. 



The four species found in our limits belong to the subgenus 

 Stictoponera, Mayr ; the generic characters given above apply, 

 strictly, only to the species of the subgenus. 



Key to the Species. 



ti. Clypeus with a medial longitudinal groove. 

 a'. Eyes placed at the sides of the head ; the 



distance between the eyes and the base 



of the mandibles greater than between 



the eyes and the top of the head E. bicolor, p. 83. 



l>'. Eyes placed a little more forward ; the 



distance between the eyes and the base 



of the mandibles about equal to that 



between the eyes and the top of the 



head E. binghami, p. 83. 



