82 icuxEUMoxiD.i;. 



Tliis species so closely resembles the preceding that it is only 

 upon the distinct venation of the wings that I was finally enabled 

 to satisfy myself of its right to specific rank ; it differs also 

 iu having the hind coxa? entirely metallic green, with their 

 tibiae not or hardly apieally infuscate, but their femora nuich more 

 determinately black at the apex ; the abdomen more distinctly 

 carinate longitudinally in the centre, with the fourth and 

 following segments (except at their apices), and the eighth entirely, 

 green ; the terebra as long as the body ; tlie scutellum sometimes 

 pale ; and other minor details. But, wliereas in X. eliznbetJue the 

 second recurrent nervure of the fore wings is emitted from 

 the external cubital at an appreciable distance beyond that from 

 which the submarginal (i. e. the inner nervure of the wanting 

 areolet) rises, in A^ annvlicornis the second recurrent is directly 

 continuous througli the cubital to the submarginal nervure, which 

 I consider a good and sufficient structural distinction for the 

 erection of species. 



43. Xylonomus csBrulescens, sp. n. 



cJ 2 . A large, immaculate and brilliantly metallic blue species, 

 with the legs concolorous and the abdomen obliquely impressed. 

 Head cubical and broad behind the internally parallel eyes ; 

 occiput bordered and the convex frons finely trans-aciculate on 

 either side of the ocelli and cornute between the antennae ; face 

 deplanate, rugulose and subelevated on either side ; clypeus 

 strongly discrete, subconcave and apieally rounded throughout ;, 

 mandibles stout, basally broad, apicall}^ obtuse, with no teeth but 

 sinuate internally before their apices. Antennce filiform; of (5, 

 strongly attenuate apieally, as long as the body and immaculate ; 

 of 5 , with the eight apical joints incrassate, the sixth from apex 

 obliquely truncate and emitting the fifth from its external apex 

 onlv, the former also bearing three strong seta? at its apex, and 

 one at its centre, externally ; 2 with tiagellar joints 13 and 14 

 white. Thorax cylindrical, discally very strongly impressed ; 

 metanotum elongate, deplanate and shagi-eened, Avith the petiolar 

 area short, glabrous and discreted ; areola entire and sublinear, 

 with no costuhe ; lateral carina? strong; apophyses prominent; 

 spiracles linear. Scutelhim deplanate, immarginate and apieally 

 impressed. Abdomen longer than the head and thorax, broadest 

 beyond the centre, M'ith the basal segment half its length, strongly 

 bicarinate, very gradually widened thi-oughout, and laterally emar- 

 ginate beyond the centre ; the three following segments deeply and 

 obliquely impi-essed from near their apical angles to the centre of 

 the base ; valvulae of c? not exserted ; terebra longer than the 

 bodv (25 millim.). Legs elongate, with the tibia? not swollen, 

 but the antei'ior pairs of 2 ioternally sinuate basally ; claws 

 simple. Winr/s with no areolet and the base of the stigma 

 conspicuously \vhite, of c? entirely hyaline and of $ strongly 



