the Genus Pison. 299 



vertex. Thorax sub-ovate^ the collar transverse ; the 

 metathorax with a central longitudinal channel ; the an- 

 terior and intermediate tibiee with a single spine at the 

 apex ; the anterior wings ivith one elongate marginal cell, 

 and tivo submarginal ones, the first suhmarginal receiving 

 the first recurrent nervure toivards the apex, the second re- 

 current nervure uniting unth the first transverso-medial 

 nervure. Abdomen oblong-ovate^ the margins of the 

 first and second segments depressed. 



It will be seen that this genus is established solely 

 upon the absence of the second submarginal cell which, 

 in the genus Pison, and also in Pisonitus, is petiolate ; 

 in some species the cell is very minute, in the present 

 genus it is obliterated, and that this is a constant cha- 

 racter there can be no doubt, as a large number of speci- 

 mens of P. agilis and of P. rifipes have been examined. 



1. Parapison obliteratus. Smith. 



Pisonoides obliteratus. Smith, Journ. Proc. Linn. Soc. 

 Zool. ii. 104. 



Hab. — Borneo (Sarawak) . 



In the collection of W. W. Saunders. 



2. Parapison rufipes, n. sp. 



Female. Length 3j lines. Black and shining, the 

 legs ferruginous, abdomen with silvery bands. 



Head : very finely and closely punctured, the clypeus, 

 inner orbits of the eyes, and the cheeks, with bright 

 silvery pile; the mandibles ferruginous. Thorax punc- 

 tured like the head; the mesothorax with a central 

 longitudinal depression, and an abbreviated line on each 

 side opposite the tegulse; the metathorax with a deep 

 central longitudinal channel ; the collar and sides of the 

 thorax with silvery pubescence, most dense and long at 

 the sides of the metathorax ; the legs ferruginous, with 

 the coxae black above ; wings hyaline and iridescent, the 

 nervures and stigma black. Abdomen; the apical mar- 

 gins of the segments pale testaceous, and covered with 

 silvery pile ; the entire abdomen has a thin changeable 

 silvery pile above. 



Hob. — India. 



In the British Museum. 



