278 Mr. J. O. Westwood on Evania, ^c, 



apice nigris, valvulis oviductus piceis, longitudine thoracis et 

 abdominis conjunctim. (Habitat in Malabaria. Communic. 

 Dom. Newman.) 



The obsolete veining of the wings of this insect will be regarded 

 as a generic character by those who adopt the genera separated 

 from Evania. 



Paxyllomma, Brebisson. 

 Plancus, Curtis. Hybrizon, Esenb. (partim), Fallen. 



This curious little genus, in its 13-jointed antennae and long 

 slender abdomen, attached higher than in the ordinary Ichneu- 

 monidce, as also in the elongated and compressed hind legs, offers 

 a certain degree of relation with some of the above genera 

 The form of its mandibles, however, the shortness of its 4--jointed 

 maxillary and 3-jointed labial palpi, and especially the union of 

 the postcostal vein with the costa of the fore wings, sufficiently 

 indicate its relation with the adscitous Ichneumonida', — the position 

 of the submarginal cells of the fore wings is anomalous, the 

 second of these cells, being obliterated; but Microdus (Bassus 

 calculafor, Curtis) and Microgaster show us that this cell is liable 

 to a diminution of size. The number of joints of the antennae is 

 greatly diminished in some of the most aberrant of the Adsciti, 

 there being not more than eleven in some of the species of 

 Aphidius, The form of the abdomen, and more especially the 

 place of its insertion on the metathorax, we have seen, affords no 

 exclusive character of the family Evaniidce. So that I think we 

 are justified in rejecting Paxylloma from that family. 



I have represented the typical species P. huccata in my " In- 

 troduction to the Mod. Classif. of Insects," vol. ii. p. 134, fig. 74, 

 17, 18, from a specimen kindly sent me by M. Wesvnael. 



