XYLOJJOMUS. 79 



40. Xylononms abaddon, sp. n. 



. A dull black species, with the body profusely pale-marked 

 and the stigma basally pure white. Head cubical and posteriorly 

 not narrower than the internally parallel eyes ; vertex very broad 

 behind the ocelli and, like the irons, glabrous ; face subtransverse, 

 closely and superficially punctate ; clypeus strongly transverse, 

 discrete, basally carinately elevated, apically broadly rounded and 

 centrally concave ; mandibles slender and apically edentate, their 

 base as broad as the length of the cheeks ; frontal and external orbits, 

 cheeks and whole face white. Antenna} slender, infuscate, with 

 the ninth to thirteenth flagellar joints pure white, the basal ones 

 stramineous and the scape entirely testaceous. Thorax black, with 

 the propleurse and prosternum entirely, the mesopleime broadly, 

 the callosities before and beneath the radices, and the apical half 

 of the metathorax (except below), testaceous; mesonotum distinctly 

 and somewhat finely punctate, with strong and crenulate notauli ; 

 metanotum obsoletely punctate, basal area elongate and triangular ; 

 areola entire, pentagonal and longer than broad, emitting distinct 

 costuke from its centre ; petiolar area broader than long, and 

 entire, with apophyses strongly acuminate ; spiracles elongate-oval; 

 metapleurrc scabrous, with lateral carinae distinct. Scutellum and 

 postscutellum flavous, the former not conxex, closely and obso- 

 letely punctate, with its apex subtruncate. Abdomen hardly 

 longer than the head and thorax, broadest behind the centre, 

 black, with the apices of all the segments bright flavous and the 

 basal half of the first testaceous ; the three basal segments closely 

 and alutaceously punctate, transversely impressed before their pale 

 apices, the first with no discal carinae, the second and third deeplv 

 sulcate laterally, as well as obliquely from the side of the apex to 

 the centre of the base ; terebra nearly as long as the abdomen, 

 with the valvulse red and apically black. Lec/s elongate and slender, 

 fulvous, with the anterior pairs paler and their coxae stramineous; 

 front tibiae basally sinuate ; hind trochanters, extreme apices of 

 their femora, and of their tibiae more broadly, subinfuscate, their 

 tarsi pure white, with the minute claws and onychii blackish. 

 Winys clear hyaline, with the junction of the internal and external 

 cubital nervures, and of the basal nervures, infumate; tegtilre 

 black, radix pale, stigma and nervures piceous, with the base of 

 the former pure white ; median nervure not continuous through 

 the basal ; second recurrent strongly curved, narrowly bifenes- 

 trate and emitted from the external cubital distinctly beyond its 

 junction with the internal ; hind wings with the first recurrent 

 but slightly postfurcal, emitting the strong nervellus from a little 

 below its centre. 



Length 12 millim. 



ASSAM : Khasi Hills (Col. Godwin- Austen). 



Type in the British Museum. 



The typical female, and a second of the same sex taken with it, 

 are the only specimens I have seen of this species. 



