HYMENOPTERA. 51 



1/2. ThYNNUS TARSATUS. 



Thynnus tarsatus, Klug, Berl. Abhandl. (1842) 39. 54^. 

 Hab. Brazil. 



173. Thynnus philanthoides. 



Thynnus philanthoides, Klug, Berl. Abhandl (1842) 40. 55. 

 f. 9 c?. 



Hab. Brazil (Porto Alegre). 



174. Thynnus scutellaris. 



Thynnus scutellaris, Klug, Berl. Abhandl. (1842) 40. 56 <? . 

 Hab. Brazil (St. Joao del Rey). 



175. Thynnus ljetus. 



Thynnus laetus, Klug, Berl. Abhandl. (1842) 41. 58. f. 10 <? . 

 Hab. Chili. 



176. Thynnus elegans. 



Male. Length 9 lines. — Black, variegated with yellow : the 

 mandibles, clypeus, face on each side of it, and a broad stripe 

 behind the eyes, yellow. The anterior and posterior margins 

 of the prothorax, a large oblong macula beneath the wings, the 

 scutellum, post-scutellum, and metathorax, yellow ; the legs 

 pale ferruginous, the femora yellow beneath, above black ; wings 

 slightly coloured, with a fuscous cloud occupying the apex of 

 the marginal and the third submarginal cells. Abdomen : the 

 basal segment yellow, with a black line down the middle, the 

 following segments with a large ovate macula on each side ; the 

 head and thorax with confluent punctures ; the abdomen with 

 close, fine, shallow punctures. 



Hab. South America. 



177- Thynnus decorus. B.M. 



Male. Lengths lines. — Black, shining, and punctured through- 

 out ; not very closely so : the clypeus, mandibles, inner orbits of 

 the eyes, and an abbreviated line behind them, yellow. The an- 

 terior and posterior margins of the prothorax yellow, the former 

 slightly, the latter widely interrupted ; the tegulae, an irregu- 

 larly-shaped s])ot beneath the wings, a spot on the disk of the 

 mesothorax, a lunate one ou the scutellum, the post-scutellum 

 and a s])ot on each side, and a large curved spot on each side of 

 the metathorax nearly meeting in the middle, yellow; wings 

 hyaline and iridescent, with a dark fuscous cloud in the marginal 



D 2 



