30 HYMENOPTERA. 



75. THYNNUS INTRICATUS. B.M. 



Male. Length 4 lines. Black: the head finely rugose ; a 

 narrow line at the lower orbits of the eyes, the clypeus and an- 

 terior margins of the face, two spots between the antennae, and 

 a spot at the base of the mandibles, white ; an oblique reddish- 

 yellow spot on each side of the vertex touching the eyes ; an 

 anchor-shaped black spot on the clypeus. Thorax finely punc- 

 tured ; the metathorax finely rugose, except its extreme base, 

 which is smooth and shining ; a line on the anterior and pos- 

 terior margins of the prothorax, the former slightly interrupted, 

 a spot on the tegulse, a longitudinal stripe on the mesothorax, a 

 spot on the scutellum, a spot on the posterior lateral margin of 

 the metathorax, and three spots on each side of the thorax be- 

 neath the wings, white; the wings hyaline, their nervures black. 

 Abdomen smooth and shining ; the basal segment with a minute 

 white spot on each side, the four following segments with a 

 large oblique spot at their lateral margins and two small ones 

 in the centre, these spots united to each other on each side by 

 a narrow curved line ; beneath, the second, third, and fourth 

 segments with an ovate wiiite spot at their extreme lateral mar- 

 gins ; the terminal segment produced into an obtuse appendage 

 which has a minute tooth in the middle of its apical margin. 

 Hob. Tasmania. 



76. THYNNUS NIGER. B.M. 



Male. Length 7-8 lines. Black : the head and thorax very 

 closely punctured, and with silvery pubescence on the cheeks, 

 coxae, femora, pectus, and metathorax ; the clypeus and man- 

 dibles yellow ; the tips of the mandibles, margins of the clypeus, 

 and two oblique spots on the latter, black ; the wings hyaline with 

 a yellowish tinge, the nervures and outer margins of the tegulae 

 obscurely ferruginous ; the spines and claws of the tarsi ferrugi- 

 nous. Abdomen shining and finely punctured; a deeply impressed 

 longitudinal channel in the middle of the basal segment ; the mar- 

 gins of the segments constricted ; the apical segment terminating 

 in an acute spine which has a minute lateral spine at its base. 

 Hab. Tasmania. 



77. THYNNUS (AGRIOMYIA) NITIDUS. B.M. 



Male. Length 4-J lines. Black, shining, and punctured ; the 

 head and thorax with a thin cinereous pubescence ; tips of the 

 mandibles ferruginous ; the wings subhyaline, and slightly 

 fuscous towards their apex, the nervures black ; the tarsi ob- 

 scurely ferruginous, with the spines ferruginous. Abdomen 

 covered with fine shallow punctures, the margins slightly punc- 



