1 62 Mr. Cameron 071 



The truth seems to be that the species of the larger 

 genera arrange themselves differently in the various zoo- 

 logical regions. To carry out the present system of minute 

 generic analysis can only lead to the creation of "genera," 

 the characters of which are only applicable to the species of 

 one region. With our present knowledge of the Hy- 

 menoptera, the system, to my mind, when carried to 

 extremes, will do more harm than good, and may lead to 

 great confusion; for it will render the identification of 

 genera almost impossible when species are studied outside 

 the limits of the region where such genera have been 

 formed. Possibly in no order of insects is the question of 

 generic definition more perplexing than in the Hymen- 

 optera; the greater the reason, therefore, is there for care 

 being exercised in the formation of new genera ; as, unless 

 this is done, it will simply lead to confusion and additions 

 being made to an already too large synonymy. 



TENTHREDINID^. 



SeLANDRIA (?) ROTHNEYI, Sp. IIOV. 



Nigra-coerulea ; coxis, trochantcribits posticis diinidioque 

 basal I tibiariun posticariini^ a Ibis ; a I is fere Jiyalinis. Long. 

 7 mm. 



Hab. Barrackpore, Bengal {G. A. J. RotJiney). 



Antennae shortly pilose, longer than the head and 

 thorax united, the third joint slender, slightly curved, nearly 

 one-fourth longer than the fourth ; the 5th — 8th joints 

 produced sharply at the apices beneath ; the 6th — 8th much 

 shorter than the fifth. Head : the face and clypeus covered 

 with long white hair ; clypeus truncated at apex ; frontal 

 area distinct, obscurely roughened ; a short keel in the 

 centre, which is depressed ; sutures on vertex not reaching 

 to the back of the head ; eyes converging in front, reaching 

 near to the back of the head. Body and legs shortly and 



