Manchester Memoirs, Vol. xli. (1897), No. 4. 19 



ROTHNEYIA, gen. nov. 



Differs from all known Ichneumonidae by having only 

 three visible abdominal segments, the third ending at the 

 apex in a semicircle which forms at each side a stout 

 tooth ; the scutellum projects at each side in a stout 

 triangular tooth ; there are two large spines on the centre 

 of the median segment at the side. Antennae 25-jointed. 

 Legs and wings as in Ichneumon. 



This genus does not fit well into any of the subtribes 

 of Ichneumonides. The alar neuration is quite as in 

 Ichneumon ; but otherwise the genus differs completely ; 

 and, as regards the abdomen, it can only be compared 

 with some Braconidae such as Chelonus. The form of the 

 spiracles I cannot determine from the roughness of the 

 median segment. 



ROTHNEYIA WROUGHTONI, Sp. 110V. (PL 3, f. 3). 



Nigra, petiolo ferrugineo ; pedibus rufis ; geniculis, tibiis 

 iarsisque posticis, nigris ; alls hyalinis, basi antennarum late 

 rufis. 2 . Long. 5 mm. 

 Hob. Mussouri {Rothney). 



Antennae black ; the 5 — 6 basal joints of the flagellum 

 brownish ; closely covered with a microscopic down, the 

 scape with white hair. Head black ; below the antennae 

 thickly covered with long white hair ; the front and 

 vertex punctured, more sparsely covered with fuscous hair. 

 Mandibles depressed at the base ; piceous in the middle ; 

 the palpi white. Thorax black ; the mesonotum more 

 strongly in the centre, which is broadly raised ; the 

 scutellum rugosely punctured ; the sides raised ; the apex 

 between the teeth depressed ; the apex of the teeth 

 rufous. The middle of the metanotum between the teeth 

 stoutly bordered or margined all round ; the top longi- 

 tudinally, the apex irregularly transversely striolated ; 

 with a semicircular keel at the extreme apex. Pleurae 



