GENUS ONYCH1A. 175 



Aspicera, Dbm., and Omolaspis, Gir. The former is 

 readily known from either Onychia or Omolaspis by the 

 scutellum ending in a sharp, stout, projecting spine 

 (PL IY, fig. 17) ; Omolaspis does not differ mate- 

 rially from Onychia, except that the radial cellule is 

 almost closed at the base, the subcostal nervure not 

 being obliterated as in Onychia, and the petiole is less 

 distinct. 



Genus ONYCHIA. 



Onycliia (Haliday), Westwood, Int., ii, Append., 56; Reinhard, 



B. E. Z., iv, 236. 



Callaspidia, Dahlbom, Ony. och. Call., 10. 

 Xylaspis, Htg., Germ. Zeit., iv, 416. 



Scutellum bisulcated, truncated at the apex, oblong; parapsidal 

 furrows distinct, rugose ; an acutely pointed (at the base) field between 

 them at the base of the scutellum ; radial cellule open in front and behind 

 through the subcostal nervure not reaching to the costa; petiole 

 shortish, not ringed; thorax rugose, opaque; antennae filiform, the 

 third joint slightly incised with the $. 



The head is broader than the thorax, short, keeled 

 down the sides ; eyes large, bare, placed well up, the 

 head projecting behind them, occiput margined. An- 

 tennaa in ? subfilif orm ; in <$ thinner and longer, 

 and scarcely tapering towards the apex. Thorax 

 large, rugose ; the prothorax narrow above, having 

 a forward gradual slope towards the head. On the 

 mesonotum there is a wide furrow at the tegulae ; 

 the parapsidal furrows are complete, curved, rugose, 

 wide ; the field at the scutellum is crenulated. At the 

 base of the scutellum are two large, deep, shining 

 foveae, separated by a sharp keel, which is continued 

 to the apex ; behind these f oveas the scutellum is de- 

 pressed on either side of the keel, and with one or two 

 transverse keels. The scutellum projects over the 

 median segment, which is nearly perpendicular and 

 keeled in the centre. Petiole a little longer than broad. 

 Legs stout, longish, especially the hinder, which have 

 the tibiae deeply sulcated. Metatarsus nearly as long 

 as the following joints united. Radial cellule longer 



