36 HYMENOPTERA. 



thorax beneath, and the scale, pale ; head large, much wider than 

 the thorax or abdomen, the thorax much compressed behind; 

 the scale narrow, elongate, and rounded above. 



Worker minor. Length 2h lines. — Differs from the large 

 worker in having the head nai-rower and the thorax more elon- 

 gate ; it is also rather darker-coloured. 



Hab. St. Helena. 



120. Formica sericata. 



Formica sericata, Guer. Voy. Coq. Zool. ii. 203; Atlas, Ins. pi. 8. 

 f. 2, 2A, 2B, 2C, 2D ^. 



Hab. New Hebrides. 



121. Formica zonata. 



Formica zonata, G'weV. Voy. Coq. Zool. ii. 205 ? . 

 Hab. Port Praslin (New Ireland). 



Species of Australia and Tasmania. 



Subdivision 1. 



Anterior wings with one marginal, two submarginal, and one 

 discoidal cell. The scale of the peduncle vertical and compressed. 

 Workers with distinct oceUi. (Sp. 122, 123.) 



Note. — ^We have seen only two females belonging to this sub- 

 division, from Australia. 



122. Formica detecta. B.M. 



Female. Length 6 lines. — Nigro-fuscous : the antennae and 

 legs ferruginous. Head fusco- ferruginous; the sides, beneath, 

 the face anteriorly and the mandibles ferruginous ; rather wider 

 than the thorax, and emarginate behind, with an impressed line 

 running from the anterior stemma to the base of the clypeus. 

 Thorax ovate, thinly covered on the disk with short reddish- 

 brown pubescence ; wings subhyaliue, 3'ellowish along the ante- 

 rior margin of the superior pair and towards their base; the 

 nervures ruio-fuscous. Abdomen ovate, the apical margins of 

 the segments rufo-piceous ; covered with a fine grey silky pile ; 

 the scale of the peduncle subovate, compressed, with the margin 

 entire. 



Hab. Australia (Hunter River). 



