3/8 HYMENOPTERA, 



is continued downwards to the insertion of the abdomen ; the 

 wings hyaline and iridescent, the tegulae pale testaceous ; the 

 anterior tibife in front, the tarsi, and also the tips of the interme- 

 diate and posterior tibiae, the knees and tips of the joints of the 

 tarsi, pale rufo-testaceous ; the calcaria pale testaceous ; in some 

 examples the tips of the coxse, the trochanters, and the tips of the 

 other joints are pale testaceous. Abdomen petiolated; the first 

 segment very slender and black, the apex swollen and ferruginous, 

 as well as the three following segments, these segments frequently 

 more or less fuscous above, the three apical segments black. 



Hub. Singapore ; Java. 



7. Trypoxylon elongatum. B.M. 



Male. Length 3 lines. — Black : head rugose, the clypeus 

 with silvery pubescence ; the tips of the mandibles and the palpi 

 pale testaceous. The mesothorax and scutellum shining ; the 

 metathorax transversely rugose, with a deep central longitudinal 

 channel and two oblique ones at the base which unite with the 

 central one and form an enclosed space ; the wings hyaline, with 

 their apical margins clouded; the anterior tarsi and apical joints of 

 the intermediate and posterior pairs testaceous. Abdomen elon- 

 gate, smooth and shining; the basal segment as long as the thorax. 



Hab. Sierra Leone. 



8. Trypoxylon frontale. 



Female. Length 3 lines. — Black : head subquadi'ate, very 

 closely and finely punctured; the mandibles pale rufo-testaceous; 

 the front produced into an angular prominence between the 

 antennae, the apex acute ; a slightly impressed line runs from the 

 anterior stemma to the angular point. The posterior margin of 

 the prothorax and the tegulae, the anterior tibiae in front, and 

 the tarsi, pale testaceous ; the mesothorax and scutellum very 

 closely and finely punctured ; the wings hyaline and splendidly 

 iridescent ; the metathorax transversely striated ; at the base is 

 an enclosed space which is obliquely striated, with a deep longi- 

 tudinal channel, slightly interrujited at the verge of the oblique 

 truncation. Abdomen smooth and shining, covered with a fine 

 cinereous pile. 



Hab. Africa. (Coll. F. Smith.) 



y. Trypoxylon rufimanum. 



Trypoxylon rufimanum. Spin. Mem. Accad. Torino, xiii. 59. 42 



(1853). 



Hab. Brazil (Para). 



