104 HYMENOPTERA. 



curved ; the clypeus truncate in front, with the lateral angles 

 emarginate ; the mandibles bent, smooth and shining, their inner 

 edge only touching towards their apex, and being finely denticu- 

 late ; the eyes less prominent than in tuberculata or brunnea ; 

 the wings subhyaline, the nervures rufo-testaceous, and covered 

 with a fine downy pubescence ; the node of the peduncle subglo- 

 bose, and produced behind into an obtuse tooth or tubercle ; be- 

 neath, it is pinched into a sharp longitudinal edge, with a tooth 

 at the base and another about the middle. 



Hab. Brazil (Santarem). (Coll. H. W. Bates.) 



This species resembles the two preceding, but is readily dis- 

 tinguished by the fineness of the striation, and by not having any 

 angles or teeth on the head and thorax ; the pubescent wings are 

 a strong distinctive character. 



4. ECTATOMMA PUNCTATA. B.M, 



Worker. Length 4 lines. Obscure reddish -brown : the head ? 

 thorax, and node of the peduncle, with distant large shallow 

 punctures, the interstices between the punctures very closely and 

 very finely punctured ; the legs and mandibles of a brighter red 

 than the rest of the body ; the mandibles finely striated longitu- 

 dinally, their inner edge very finely serrated ; the anterior margin 

 of the clypeus rounded, the posterior margin of the vertex trun- 

 cated. Thorax oblong, slightly narrowed posteriorly ; the meta- 

 thorax with a slight excavation, the shape of the anterior face of 

 the node of the peduncle, which is curved in front and rounded 

 behind, with an impressed central line above. Abdomen closely 

 covered with very delicate shallow punctures ; a deep strangula- 

 tion between the first and second segments, the apical margins of 

 the third and following segments pale rufo-testaceous. 



Hab. Australia (Port Lincoln). 



5. ECTATOMMA ACICULATA. B.M. 



Worker. Length 5 lines. Black : the mandibles, legs and 

 abdomen obscurely ferruginous ; the head closely covered with 

 large coarse shallow punctures, which run into diverging striae 

 on the vertex ; the head truncate behind. Thorax elongate, with 

 distant shallow punctures ; the node of the abdomen incrassate 

 and subconical. Abdomen : the first and second segments trans- 

 versely and delicately aciculate. 



Hab. Australia ; Hunter River. 



This species very closely resembles E. punctata, of which it 



