HYMENOPTERA. 285 



which arm the tibiae, and the apical segment of the abdomen, 

 ferruginous ; the wings yellow, with a broad dark fuscous border. 



Hab. The Gambia. (Coll. F. Smith.) 



36. LARRADA SERICEA. 



Female. Length 6 lines. Black : the face covered with golden 

 pubescence ; on the cheeks and base of the mandibles it is silvery; 

 the mandibles and scape ferruginous, the former black at their 

 tips. The thorax covered with cinereous pubescence; on the 

 mesothorax it is very short and sparing, but dense and longer on 

 the metathorax; a spot of golden pubescence in front of the 

 tegulse; the legs ferruginous, with the coxae and trochanters 

 black; the wings hyaline, their nervures and tegulae ferruginous. 

 Abdomen covered with a grey sericeous pile, the apical margins 

 of the segments with bands of bright silvery pile, very brilliant 

 in some lights, the apical segment smooth and shining. 



Hab. The Gambia. (Coll. F. Smith.) 



Species of Australia. 

 Abdomen black. 



37. LARRADA AUSTRALIS. B.M. 

 Tachytes Australis, Sauss. Mem. Soc. Phys. Geneve, xiv. fasc. 1. 



19. 8. t. f. 7 ? . 

 Hab. New Holland. 



38. LARRADA FEMORATA. B.M. 



Tachytes femoratus, Sauss. Mem. Soc. Phys. Geneve, xiv. fasc. 1 . 

 20.9.t.f. 6c?. 



Female. Length 6^ lines. Black: the head smooth and 

 shining, the face has a little silvery pubescence, the mandibles 

 ferruginous. Thorax opake ; the raesothorax and scutellum very 

 closely punctured ; the metathorax very finely shagreened, the 

 sides parallel ; the legs ferruginous, the coxse, trochanters and 

 anterior legs black; the anterior tarsi, apex of the tibize and 

 knees rufo-piceous ; the wings smoky and iridescent, the tegulie 

 testaceous. Abdomen smooth, shining and very delicately punc- 

 tured, the margins of the segments with a silvery border and 

 narrowly rufo-piceous, particularly the three apical ones; the 

 apical segment triangular, margined at the sides, and with a few 

 large punctures. 



Hab. New Holland, 



