EPIRI1YSSA. RHYSSA. 91 



mark, which is longer than broad, of equal width throughout, and 

 transverse at both base and apex ; metanotum fulvous, with a 

 narrow line on its base, a large and somewhat triangular mark on 

 its apical half and an apical line, black ; pleurae fulvous, with 

 short white pubescence, the propleurse with a conical mark below, 

 and the metapleurae below, and at apex, black. Scutellwm entirely 

 fulvous and finely trans-striate ; postscutellum black. Abdomen 

 fulvous, with discal bands at base and apex of all the segments 

 nitidulous black, those on the penultimate segments discally 

 continuous. Leys fulvous, with a broad discal band slightly behind 

 the centre of all the femora and a shorter basal line on the hind 

 ones, the posterior tarsi entirely arid their trochanters basally, the 

 hind tibiae broadly at both base and apex, and the front onychii, 

 black. Wings hyaline, with their apices distinctly infumate ; 

 nervures and stigma black. 



Length 10 millim. 



CEYLON ; Hantane (E. E. Green). 



This species is much smaller than E. maculicornis, of which it 

 may, nevertheless, constitute the alternate sex, though its colour 

 is described as of a much darker yellow and the black markings 

 are slightly more profuse, especially upon the legs ; unfortunately 

 the structure of the metathorax is not yet indicated. 



Genus RHYSSA, Grav. 

 Rhyssa, Gravenhorst, Ichn. Eur. hi, 1829, p. 260. 



GENOTYPE, Ichneumon persuasoria, L. 



A genus of very large and strongly elongate species with trans- 

 striate mesonotum and terebra longer than the body. Head short, 

 subbuccate and transverse, usually dilated behind the oval or 

 subreuiform eyes ; clypeus very short, strongly transverse and 

 generally a little produced centrally at the apex, often indistinctly 

 separated basally ; mandibles basally broad. Antennae filiform, 

 not attenuate apicallv, with the flagellar joints elongate. Thorax 

 subcylindrical, disc-ally deplanate ; pronotuni centrally glabrous ; 

 mesonotum closely and regularly traus-striate throughout, with 

 notauli entire and often deeply impressed ; metanotum longi- 

 tudinally canaliculate, with the areola rarely indicated ; spiracles 

 oblong or oval. Scutellum subconvex and apically obtuse. 

 Abdomen cylindrical, sessile, smooth and shining, glabrous or 

 obsoletely alutaceous ; <S with the ventral valvulae exserted ; 

 $ with the anus subcompressed, the third segment not basally 

 impressed, the eighth exserted and subtriangular, the apical 

 ventral not reaching the base of the terebra, which is longer than 

 the body, with the sheaths not pilose. Legs, especially the hind 

 pair, elongate; tarsal claws simple; posterior coxae subcylindrical. 

 Wings ample, though not broad, with the areolet entire, triangular, 

 sessile or subpetiolate ; nervellus intercepting the first recurrent 

 of lower wings very near its junction with the median nervure. 



Range. Palaearctic and Nearctic Eegions. 



