236 MESSRS. T. BLACKBURN AND P. CAMERON ON THE 



nent; there is a fine A-shaped furrow over the antennae. 

 Antennae with a short pedicle at the base, 13-jointed, 

 microscopically pilose; the basal joint three times as long 

 as the second (a little longer than the basal joint of the 

 flagellum, which is shorter than the second ; the other 

 joints longer, the last is longer than the twelfth ; a fine 

 keel runs down the centre of the mesonotum, the sutures 

 dividing the front lobe shallow ; sides of scutellum behind 

 shining, obliquely striated ; the apical half of the meta- 

 notum with several stout transverse keels. Abdomen 

 opaque, finely alutaceous, longer than the head and thorax 

 united. First^segment shorter than the second ; its suture 

 at base smooth and shining, the apex striated ; the tooth 

 on lower side short, thick, slightly curved (the node as 

 in worker). Wings hyaline, the apex in front of stigma 

 smoky ; nervures testaceous, stigma fuscous. 



Myrmicid.e. 



56. Monomorium specularis. 



Monomorium specularis, Mayr, Sitz. d. Math. -Nat. Wien, 1866, p. 509. 



Hab. Honolulu. 



This is a South-Sea Island species ; also found in Brazil. 



57. Tetramorium guineense. 



Formica guineense, Fab. Ent. Syst. ii. p. 357. 



Hab. Oahu. Common in the tropical parts of America, 

 in Manilla, and Australia, and in hothouses in Europe. 



58. Pheidole megacephala. 



Formica megacephala, Fab. Ent. Syst. ii. p. 361. 

 (Ecophthora pusilla, Heer, Ueber die Hausameise Madeiras. 



Hab. Honolulu, One of the commonest ants in the 



