38 HYMENOPTERA. 



its anterior margin, as well as that of the mandibles, ferruginous ; 

 the mandibles large, stout, triangular, and furnished with seven 

 acute teeth within ; antennae long and slender. Thorax elon- 

 gate, narrow, and forming anteriorly a short neck ; the posterior 

 portion compressed, the metathorax rounded behind ; legs elon- 

 gate and slender. Abdomen ovate; the scale incrassate and 

 nodose; the abdomen thinly sprinkled with long pale pubes- 

 cence ; the head and thorax, legs and antenna; thinly covered 

 with short pale pubescence. 



Hab. New Holland. 



127. FORMICA CONSECTATOR. B.M. 



Female. Length 5 lines. Black, smooth and shining. Head 

 oblong, not wider than the thorax ; the anterior margin of the 

 clypeus entire ; the mandibles strongly punctured, and ferrugi- 

 nous at their apex ; the antennae and legs pale rufo-testaceous. 

 Thorax ovate. Abdomen ovate; the node of the peduncle sub- 

 ovate, its superior margin entire. 



Hab. Australia. 



128. FORMICA NIGRICEPS. B.M. 



Worker. Length 5| lines. Pale ferruginous, with the head 

 black, the face anteriorly and the mandibles ferruginous. The 

 clypeus slightly produced, and widely emarginate, or rather, 

 notched in front, its extreme anterior margin black; the an- 

 tennae ferruginous. Thorax rounded in front, and gradually 

 narrowed and compressed towards the metathorax ; the scale 

 ovate, its margin rounded ; the legs elongate. Abdomen ovate ; 

 the insect thinly sprinkled with erect ferruginous hairs. 



Hab. Australia. 



129. FORMICA SUFFUSA. B.M. 



Female. Length 7 lines. Black : the head obscurely ferru- 

 ginous, the face darkest, the antennae black ; the thorax with the 

 sides with ferruginous stains above, the scutellum and two lon- 

 gitudinal stripes on the mesothorax, ferruginous ; the legs ferru- 

 ginous ; wings fusco-hyaline, the nervures light brown, with a 

 stain running along their course. Abdomen ovate, thinly clothed 

 with pale golden pubescence. 



Hab. Australia. 



From the close resemblance between this species and F. pili- 

 ventris, it is probable that this is the female of that insect. 



