Ac.i:xiTus. 43 



quadrate, tlie basal area uarrower and the petiolar short, hiterally 

 sinuate, apically glabrous, and the lateral area; irregularly costate ; 

 apophyses large and obtuse : spiracles large, linear, and circuui- 

 costate. ScnteJhtm black, deplanate and finely ])unctate tlu-oughout, 

 laterally carinate to the centre, with its basal fovea quinque- 

 carinate : postscutellum glabrous. Abdomen much narrower than 

 the thorax, with its apic-al halt' strongly compressed and latei'ally 

 clavate; three or four basal segments nitidulous and impunctate ; 

 apices of all the dorsal and ventral segments very narrowly 

 testaceous ; basal segment elongate, centrally sulcate to its apical 

 third, with a row of punctures on either side and the spiracles a 

 little before its centre ; gastrocceli obsolete, extreme anus testa- 

 ceous. Lcf/s: anterior pair entirely stramineous, with the apices 

 of the bifid claws alone infuscate, front calearia strongly curved : 

 hiud legs stout and elongate, black, with the trochanters tlavescent, 

 femora except at apex fulvous, and the tarsi, except the simple 

 claws and basal half of first joint, stramineous. Wuif/s uniformlj' 

 infuscate-hvaline \\ith the external margin hardly darker ; radix 

 rufescent, tegukB black, nervelet obsolete ; tiie bifenestrate second 

 recurrent nervure intercepting the cubital A'ery distinctly before 

 the single submarginal nervure; the first recurrent of hind wings 

 subopposite and emitting the apically curved nervellus from very 

 ■distinctly above its centre. 



Length 13 millim. 



SiKKiM (Col. C. T. Bhyjliam). 



Ti/j^e in the British Museum, 



This insect may prove to be the alternate sex of that last 

 described ; but, in view of the divergences of their frontal and 

 venational conformation, the scut-^llar and tibial colour and alar 

 infumescence, it were better for the present to treat them as 

 distinct, especially since the only individual I have seen of 

 A. alecio was captured by Binghaui in Sikkim at an altitude of 

 4000 feet in April, 1894, or some thirteen hundred miles from 

 the Nicobar Islands. 



1:^. Acsenitus xanthorius, sp. n. (Plate I, fig. 1.) 



c? $ . A flavous species, with sparse black markings, and the 

 alar apices alone infumate. Head fiavous, with tiie ocelli, apices 

 of mandibles, the distinct occipital border narrowly in the centre, 

 and in 9 f lie entire vertex, black ; frons and vertex deeply and 

 isolatedly punctate, the former vrith the scrobes large, glabrous, 

 and centrally strongly carinate to the coarsely and rugosely 

 punctate face; clypeus similarly sculptured, apically truncate, 

 and in c? uot basally discrete. Antenna' filiform and abruptly 

 obtuse apically, black, with the scape and basal flagellar joints 

 flavidous beneath; in c? , the 19th to :ilst joints (far beyond 

 the centre) stramineous. 'Thorax evenly and distinctly punctate, 

 flavous; of (S immaculate, of 5 with a broad vitta on either 

 side of the deeply impressed notauli, a spot on the longitudinally 



