436 NEW GENERA OF CHALCIDID/E. 



They are both distinguished by the remarkable incrassation of 

 the costa of the anterior wings, of which I recollect, at present, 

 no other analogous example. Mr. Walker has, indeed, charac- 

 terized a genus belonging to the same family under the name of 

 Pachyneuron ; but the incrassation of the costa of the fore- 

 wings in that genus is quite trifling compared to that observed in 

 either of the following insects ; — whilst, at the same time, the 

 insect secondly described, presents a most striking passage 

 between two sub-families (Encyrtides and Eulophides), be- 

 tween which two equally strong modes of transition have 

 already been proved to exist ; Agonioneurus and Coccopha- 

 gus forming one passage, and Tetracnemus and the typical 

 Eulophi a second. It will be evident that the two insects 

 described below, although possessing a nearly similar incras- 

 sated structure of the costa of the wings, are by no means 

 nearly allied together by affinity ; they, indeed, evidently 

 belonging to distinct sub-families. Hence, in respect to this 

 character, these insects are allied together by no nearer rela- 

 tion than that of analogy. 



Platynocheilus, Westwood* 



Cleonymo affinis ; differt antennarum articulis, costa alarum incras- 

 sata, &c. Corpus elongatum, gracile : caput thoracis latitudine, 

 oculis magnis lateralibus : antennae thoracis fere longitudine 11- 

 (vel 12-?) articulatae, articulo 1°. elongato, 2°. prsecedentis fere 

 dimidii longitudine, articulis sequentibus parvis et quasi co- 

 alitis, proximis 5 distinctis aequalibus, clava crassiori ovata 3- 

 articulata : collare elongatum trigonum : thorax oblongus postice 

 rotundatus : abdomen oblongum 

 depressum lateribus subelevatis, 

 pedunculus brevis : pedes gra- 

 ciles simplices tarsis 5-articu- 

 latis : alae anticse costa dilatata 

 et ad originem rami deflexi ex- 

 tensa, nervo subcostali nullo. 

 Mas. 



Species unica mihi adhuc cog- 

 nita. 



TlhaTwu}, dilate, et x e '^°*> merge 



