HYMENOPTERA. 109 



subclavate ; mandibles straight, toothed in the middle on their 

 inner edge and at their apex ; eyes lateral, round, and of me- 

 dium size ; minute in the workers ; ocelli three, in a triangle 

 on the vertex, wanting in the workers. Thorax oblong-ovate. 

 Wings : anterior pair with one marginal and two submarginal 

 cells, the second extending to the apex of the wings; the thorax 

 narrowed jjosteriorly in tlie workers. Legs short and stout, claws 

 of the tarsi simple. Abdomen : the node of the peduncle sub- 

 quadrate-rotundate, a deep strangulation between the first and 

 second segments. 



Male. Head transverse. Antennaj 13-jointed ; scape short 

 and conical. 



1. AiMBLYOPOiNE AUSTRALIS. PI. VII. figs. 21~24. B.M. 



Amblyopone australis, Erichs. Wiegm. Archiv (1842), p. 260^ . 



Worker. Length 3 lines. — Shining ferruginous, or rufo- 

 picecus ; sparingly pubescent. Head large, the vertex and front 

 down to the insertion of the antenna;, finely but rather distantly 

 punctured ; a deep central channel extends from the middle of 

 the head to its anterior margin ; on each side the head is obliquely 

 striated ; the mandibles longitudinally striated. Thorax : the 

 prothorax rounded in front, convex, subglobose, punctured on 

 the sides, the disk impunctate ; the metathorax oblong, the sides 

 ])arallel, truncate posteriorly, rather oblicjiiely so. Abdomen ob- 

 long, smooth and shining, with the apex pale rufo-testaceous. 



The female has the head more strongly punctured, the meso- 

 thorax much larger, and the scutelhnn developed ; the wings sub- 

 hyaline, with the nervures testaceous ; the prothorax, metathorax, 

 and sides of the node of the peduncle strongly punctured. 



Male. Length 2 1 lines. — Black, shining and pubescent : head 

 and thorax strongly punctured; the head transverse, the eyes 

 large and lateral; antennae elongate, filiform; the antenna, 

 tibiae and tarsi rufo-testaceous ; wings as in the female. 



Erichson only describes the worker of this species : the male 

 and female are in the Museum Collection. 



2. Amblyopone obscura. B.M. 



Female. Length 4 lines. — Black and shining ; the antenna;, 

 mandibles, and face anteriorly ferruginous and punctate-striate, 

 the vertex coarsely punctured ; the face with a central channel 

 which terminates at the anterior ocellus. Tliorax oblong, rounded 

 anteriorly and truncate posteriorly, the truncation transversely 

 rugose ; above coarsely punctured, the sides obliquely striated ; 



