2 TEIBK OIMBIC1NA. 



soma and Clavellaria. In the larger species (Cimbex, 

 Trichiosoma, Clavellaria) the eyes are small, and are 

 placed well in front, so that the head projects consider- 

 ably behind them ; in the smaller species (Abia, Amasis, 

 and the Brazilian genera Pacliylosticta and Plagiocera) 

 they are longer and reach nearer to the base of the 

 mandibles, while it is only in Abia and Zarcea that 

 the head projects behind them. The other genera 

 have them situated on the side. In the males of Abia 

 they become nearly confluent at the top of the head. 



The thorax is broad and thick ; the sides project 

 so that they are somewhat broader than at the top, 

 the mesopleuraB being slightly hollowed, and separated 

 by a more or less clearly defined border from the 

 sternal region. The pronotum is almost horizontal in 

 front, and has the head closely pressed to it ; it has a 

 well-defined border above, and from this runs an 

 oblique emargination towards the head, separating the 

 somewhat projecting spiracular bearing part in front 

 of the episternum from the upper portion. The form 

 of the episternum of the mesothorax is characteristic 

 through the deep groove which separates it from the 

 mesosternum, as well as from not being so obliquely 

 situated as in the other saw-flies. 



The mesonotum rises gradually from the pronotum 

 to the scutellum, which is broader than long, rounded 

 at the top, is raised above the mesonotum, and late- 

 rally there runs from it to the tegulas a well-marked 

 ridge. In front there is a deep hollow, while behind 

 the post-scutellum is almost obliterated, so that it (the 

 scutellum) presses closely on the metathorax, which is 

 raised and semicircular in front and slopes from above 

 downwards, a deep groove being thus formed between 

 it and the scutellum, the cenchri being placed on the 

 edge of the ridge so formed. 



The first cubital cellule is as long, if not longer, than 

 the second. The stigma is linear, and in the Euro- 

 pean genera is not much differentiated from the costa, 

 but in the Neotropical genus Pachylosticta it is broad, 



