7b ICHNEUMOXID.^. 



39. Xylonomus tartarus, sp. n. 



2 . A large aud soinewliat dull black species, with the body 

 immaculate, and the legs, antennas and stigma white-markccL 

 Jfcad black, cubical and posteriorly not narrower tbau the internally 

 parallel eyes; vertex very broad beliind ocelli and, like tlie frons, 

 scabrously punctate ; face transverse, closely and transversely punc- 

 tate ; clypeus discrete and carinately elevated at the base, broadly 

 rounded at the apex and centrally concave ; mandibles slender and 

 discally sulcate throughout, with their base hardly as broad as tbe 

 iniiexedly sulcate cheeks ; palpi and sides of clypeus infuscate. 

 Antenna' slender aud pure black, with ninth to thirteenth flagellar 

 joints wbite ; subapical sette distinct. Thorax immaculate black, 

 discally deplanate, with the meta- hardly narrower than the meso- 

 thorax : mesonotum transversely scabriculous, with the notauli 

 deeply impressed and not reaching the apical margin ; metanotuin 

 nitidulous and coarsely coriaceous, with complete and strongly 

 costate area3 ; basal area elongate and parallel-sided ; areola 

 hexagonal-cordiform, lai'ge and situated beyond the centre, 

 emitting costulae before its centre ; petiolar area small and sub- 

 vertical, with very large and apically obtuse apophyses and small 

 subapical spines ; spiracles large and distinctly lunate. ScvteUum 

 deplanate, punctate, black. Abdomen narrow, subcylindrical and 

 immaculate black ; basal segment finely scabriculous, thrice as 

 long as apically broad, gradually a little widened throughout, 

 with the spiracles distinctly before the centre and with obsolete 

 discal cariniB ; second aud third segments obsoletely scabriculous 

 or alutaceous, longer than broad, with their basal angles obliquely 

 impressed ; remainder strongly transvex'se ; ventral plica entire, 

 hypopygium far retracted from the terebra and ajncally rounded ; 

 spicula exactly as long as the body, rufescent and incrassate before 

 its apex, valvulae black and not pilose. Legs black, with the base 

 of all the tibia) constricted and stramineous ; femora and tibite 

 broad and compressed ; tarsi stramineous, with the onychii black 

 and the central joints infuscate ; claws very small and not 

 extending beyond the elongate pulvilli. Wings narrow and 

 hyaline ; stigma aud radix infuscate, former basally white ; areolet 

 wanting; hind wings with the first recurrent nervure but slightly 

 postfurcal, emitting the strong nervellus from its exact centre. 



Length 20-21 millim. 



" India." 



Type in the Oxford Museum. 



The above description is drawn from two females, in all proba- 

 bility from Westwood's collection. The elongate form is similar 

 to Xorides. In one example the internal nervure of the wanting 

 areolet is cui'iously iucrassate. 



