Eymenoplrm. 163 



This species is closely related to O. hidentafus from which it 

 may be known as follows : — 



Costa and nei-vures white, the wings clear lacteoiis hyaline, 3rd 

 cubital cellule distinctly narrowed behind, the recurrent nervure 

 received in the middle ; 1st transverse cubital nervure straight, 

 oblique above, flacteijiennisj. 



Costa and nervures black, the wings hyaline, the apical half fuscous 

 violaceous; 3rd cubital cellule not narrowed behind, receiving the 

 recurrent nervure clearly behind the middle ; 1st transverse cubital 

 nei"vure rounded above, fhidentatiisj. 



The 3rd transveree cubital nervnre is roundly curved ; the 

 1st has not a stump of a nervure where it commences to bend 

 towards the apex of the wing ; the yellow band on the pronotum 

 is triangularly incised in the centre ; the punctuation on the head 

 and thorax is stronger, closer, less distinct, more rugose ; the tibiai 

 iire more broadly marked with black. As in the larger species 

 there is a yellow mark behind the top of the eyes. 



CYNlPlDiE, ENCOILIN^. 



Bothrochacis, gen. nov. 



Male. Antenna} longer than the bod}', l;5-jointed, the joints 

 elongated. Scutellum pyramidal, rising obliquely from the base 

 and apex to the top, the basal sloi)e the longer, its centre raised, 

 narrowed at the base, becoming gradually wider to the top ; the 

 cup-like depression is placed on the top of the apical slope. 

 Parapsidal furrows absent. Metanotum with 2 stout keels in the 

 centre. Lower part of mesopleurse bordered by a keel, above 

 which is an impressed line. Radial cellule open along fore 

 margin. 



The wings are long, bare, their margin not ciliated ; the 

 antennal joints 4 or 5 times longer than wide, the 3rd and 4th 

 equal in length, the last longer than the preceding. Scutellar 

 foveae large, longer than wide, rounded at the base ; the alar 

 nervm-es are thicker than usual. The stout outer partition border- 



