42 r. rA:\rKrvON, o\ soMf; aitstralïax Axt) 



stouter and more distinctly, oliliqnely narrowed on the apica 

 half; the apical abscissa of radius almost equal in length with 

 the 2"'', not clearly shorter than it, the central division of 

 the P' abdominal segment is wider compared with the lateral, 

 and the abdomen broader compared with the thorax, which is 

 clearly narrower than its middle. 



The Bornean sj)ecies of Chaolta are : a. Black species with 

 red head and thorax : inqideta Sm., ruficepi^ Cam., crassicauda 

 Cam ; h. smaller, luteous species: perplewiis Sm., lutea Cam., 

 sulcata Cam., macidifrons Cam. The genus appears to be a 

 Hindo-Malay one, extending from Assam to Celebes. 



Mesostoma gen. nov. 



Head not margined behind. Clypeus separated by a suture 

 from the face, its apex transverse, obliquely depressed. Parap- 

 sidal furrows indistinct. Abdomen short, ovate, the ovipositor 

 as long as it; there are no furrows. Radial cellule long, the 

 radius extending to the apex and curved upwards ; there are 

 3 cubital cellules ; the 2"*^ large, on the lowerside as long as 

 the lowerside of the S""*^^ ; transverse median nervure received 

 beyond the transverse basal ; the recurrent nervure is received 

 in the 2"'^ cubital cellule. In the hind wings the radial 

 nervure is obliterated, or at least is very faintly indicated ; 

 the subcostal is stout, especially at the apex where it is 

 roundly curved ; the cubital is distinct to near the apex of 

 the wing; the transverse discoidal nervure is distinct; both 

 wings are ciliated round the apex. Legs stout ; of moderate 

 length ; the calcaria very minute. 



The type of this genus is a small insect, like a small Bracon. 

 The clypeus is clearly separated all round, it being raised, 

 slightly convex ; the centre of the face also projects ; there is 

 a distinct malar space, furrowed down the centre. Palpi long. 

 Antennœ over 30-joiuted. The whole body is smooth and 





