ii6 Mr. Cameron on 



long as all the succeeding segments united ; the latter above 

 (especially at their junction), as well as the sides of all, 

 covered with a short pale pubescence. Legs covered with a 

 white pubescence, the femora thickened in the middle, the 

 second cubital cellule is narrowed towards the top ; the 

 transverse cubital nervures are straight. Wings not much 

 longer than the thorax. 



This species is closely related to the European R. rufi^ 

 collis, Cam., but is much larger, the antennae and tarsi are 

 red, the metanotum is entirely red, the wings are shorter 

 and not so broadly infuscated in the middle, and with the 

 nervures for the greater part testaceous ; and the apex of 

 the petiole is much narrower, thinner, and more club-like. 



1. Ampulex compressa. 

 Ainpulex, Jurine, Hyin. 134. 



Sphex compressa, Fab., Ent. Syst. II., 206, 32. 



Ampulex compressa, Dahlbom, Hym. Eur. I., p. 29 ; Lep. 

 Nat. Hist. Lis. Hym. III., p. 325, i ; Smith, Proc. 

 Linn. Soc. (1869) p. ^i^^)- 



Chlorion compressum, Fab., Syst. Pies. p. 219, 7 ; West- 

 wood, Trans. Ent. Soc. III., p. 227. 



A common species, generally distributed over the region. 

 It preys on Blattidse. 



2. Ampulex hospes. 



Ampulex hospes, Smith, Cat. Hym. Lis. IV., p. 272, 12;^ 



Proc. Linn. Soc. II., p. 981. 

 Hab. Borneo. 



3. Ampulex smaragdina. 



Ampulex smaragdina, Smith, Proc. Linn. Soc. II., 19, 3. 

 Had. Singapore. 



■4. Ampulex insularis. 



Ampulex insular is, Smith, Proc. Linn. Soc. II., p. 99, 4. 

 Hab. Borneo, Malacca. 



