AC2ENITUS. COLLYHIA. 45 



strongly costate, external areae entirely, black; metanotum 

 rugulose, with the costae indistinct and obsolete, apophyses 

 distinct but obtuse, spiracles linear and short. Scutellum not 

 small, nor laterally carinate beyond its multicostate basal fovea, 

 evenly and not closely punctate, with pale pilosity, and its apical 

 third, like that of the glabrous postscutellum, black. Abdomen 

 nitidulous, finely and closely punctate, apically pilose and sub- 

 compressed ; flavous, with the base of all the segments, except 

 the first, basally black ; first black on either side before its centre ; 

 venter flavous, hypopygium extending to the apex and covering 

 the base of the apically black, but not incrassate, testaceous 

 valvulae ; terebra as long as the abdomen. Leys testaceous ; hind 

 pair stout and elongate with the coxa? basally above, the onychii, 

 and the base of the hardly curved tibiae, black ; anterior claws 

 bifid. Winys hyaline, the anterior pair with their apices broadly, 

 and a substigmal spot deeply, inf iimate ; radix, the anteriorly 

 black-spotted tegulae, and the base of the costa, flavous ; costa 

 and stigma black ; areolet wanting, nervelet distinct and nearly 

 us long as the submarginal nervure, which is emitted from the 

 cubital but shortly before the recurrent ; first recurrent of lower 

 wings exactly opposite, emitting the curved nervellus from its 

 centre. 



Length 8 millim. 



SIKKIM (Col. C. T. Bingham). 



Type in the British Museum. 



The distinct nervelet, strongly transverse intermediate segments 

 and elongate hypopygium place this species in Forster's subgenus 

 Chorischizus, though it is certainly congeneric with A. xanthorius. 

 with which its coloration is almost identical. 



Genus COLLYRIA, Schiod. 



Coltyria, Schiodte (nee Brulle), Mag. Zool. 1839, Ins. p. 10. 

 Pachymerus, Gravenhorst, Ichii. Eur. iii, 1829, p. 721 (part.). 



GENOTYPE, Pachymerus calcitrator, Grav. 



Head cubical, with the eyes pilose and somewhat large ; cheeks 

 buccate, not elongate, with the costa sharply iuflexed ; clypeus 

 hardly discrete, apically truncate and centrally produced. An- 

 tenna? shorter than the head and thorax; scape a little excised, 

 nagellum basally subattenuate. Thorax elongate ; pronotal 

 pomia3 conspicuous above ; notauli apically distinct ; meso- 

 sternum elongate, with no lateral sulci ; metathorax long, with 

 distinct longitudinal, but no transverse. costae ; spiracles small 

 and obliquely linear. Abdomen elongate and apically subcom- 

 pressed; basal segment parallel-sided, with central spiracles; 

 ventral valvulae not vomeriform, but covering the base of the 

 short and straight terebra. Anterior legs slender ; the hind 

 pair strong and stout, their tibiae straight and longer than the 

 iucrassate femora, calcaria short, tarsi elongate with the claws 



