78 MR. smith's CATALOaiTE OF HYMENOPTEEOIJ S INSECTS 



at the apex j antennce short, not so long as the head and thorax ; 

 the scape nearly as long as the flagellum, slightly thickened at the 

 apex ; fiagellum subclavate, 6-jointed, the first joint shorter than the 

 second; the third, fourth and fifth about the same length as the 

 first, the apical joint the length of the two basal ones. Maxillary 

 palpi 3-jointed, the basal and apical joints of about equal length, 

 the intermediate joint twice the length of the apical joint, the latter 

 obliquely truncate at the apex. Labial palpi 3-jointed, the two basal 

 joints elavate, the apical one fusiform. Thorax subglobose ; anterior 

 wings with one marginal and two subraarginal cells, the first sub- 

 marginal cell about the length of the stigma, the second extending to 

 the apex of the wing j with one sub-triangular discoidal cell ; the tibite 

 armed with a single spur at the apex. Abdomen globose, peduncu- 

 lated, the peduncle formed of two nodes. 



This genus in one of its most prominent characters agrees with 

 the genus Heptacondyliis, both having seven-jointed antennae : 

 their relative proportions are, however, very different, as well as 

 that of the joints of the fiagellum ; the wings have also a different 

 neuration ; this latter character will, I am inclined to believe, 

 prove eventually that by which the generic divisions of the Hyme- 

 noptera must be regulated ; even at present, with our meagre and 

 imperfect knowledge of the species, it does, if strictly adhered to, 

 bring together assemblages of species, allied alike in habit and 

 structure ; when taken in connexion with the structure of the 

 mandibles and legs, indicative of habit, it becomes perhaps the 

 most safe and available character hitherto adopted for their 

 generic subdivision; the greatest help to science I think is its 

 simplification. 



1. Physatta DROMEDARius. P. capitc thoiaccque ferrugineis; alis 

 abdomineque nigris. 



Female. Length Qt^ lines. The head, thorax, legs and petiole of the 

 abdomen ferruginous ; the mandibles with four or five black teeth ; 

 the head and thorax longitudinally striated and clothed, as well as 

 the legs, with erect thin fulvous pubescence ; the intermediate and 

 posterior legs dark rufo-piceous ; wings dark fuscous, slightly 

 iridescent ; the metathorax armed with two short stout spines at its 

 base, the truncated portion transversely striated. Abdomen black, 

 covered with a short erect fuscous pubescence; the nodes of the 

 petiole subglobose, the first attached to the thorax by a short stout 

 petiole. 



Hab. Borneo (Sarawak). 



