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 posteriorly in the 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. Antennae 13 -jointed; scape short 

 and conical. 



1. AMBLYOPONE AUSTRALIS. PI. VII. tigs. 21-24. B.M. 



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



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

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

 down to the insertion of the antennae, 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 

 parallel, truncate posteriorly, rather obliquely so. Abdomen ob- 

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



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

 thorax much larger, and the scutellum 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 lines. Black, shining and pubescent : head 

 and thorax strongly punctured; the head transverse, the eyes 

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

 tibia3 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 antennae, 

 mandibles, and face anteriorly ferruginous and punctate-striate, 

 the vertex coarsely punctured ; the face with a central channel 

 which terminates at the anterior ocellus. Thorax oblong, rounded 

 anteriorly and truncate posteriorly, the truncation transversely 

 rugose ; above coarsely punctured, the sides obliquely striated ; 



