Western China and Eastern Thibet. 369 



uniformly pale greenish yellow, margined with blackish at 

 the summit ; top of the front excavated, its margin broadly 

 blackish, which colour descends in the middle, forming a 

 very ill-defined T-spot, the blackish colour blending with 

 somewhat livid side-spots ; vesicle black ; eyes connected 

 in a long space, occiput forming a small black triangle. 

 Thorax black, above with two broad greenish-yellow bands, 

 interrupted posteriorly by the sinus; the sides with two 

 broad oblique greenish-yellow bands, one under each wing; 

 probably some pectoral yellowish spots. Legs black. Ab- 

 domen with the first and second segments considerably 

 dilated ; oreilettes not prominent, flattened, yellow, with 

 about three blackish marginal teeth ; general colour dull 

 blackish, becoming deeper black towards the apex, with indi- 

 cations of livid (blue or green during life ?) markings as 

 follows : — a broad lateral band and an indistinct dorsal band 

 on first and second segments, a narrow margin posteriorly to 

 the second to sixth, a broader submedian band (or semi- 

 annulus) on the third to eighth placed just below the false 

 suture; tenth segment above with a rather strong longitu- 

 dinal median carina, dilated posteriorly into a very strong 

 laterally flattened triangular tooth directed slightly towards 

 the apex. Superior appendages scarcely so long as the ninth 

 and tenth segments united, black ; viewed from above they 

 are narrow at the base, afterwards gradually dilated internally 

 to the apex, which is very obtuse and slightly excavated, the 

 opposing apices touching ; the median longitudinal carina 

 only faintly indicated, merging into the thickened apical 

 portion ; the inner edge fringed with long blackish hairs in 

 the median portion : viewed laterally these appendages are 

 straight, narrow at the base ; subsequently the upper and 

 lower edges form carinas, the upper just before the apex 

 becoming suddenly dilated and rounded (excavated above), 

 and the lower ends in a short beak-like process, slightly 

 upcurved, causing the entire apex to have a striking resem- 

 blance to the profile of the head of some kind of bird (e. g. 

 L'egtdus, with the crest not erected). Inferior appendage 

 fully two thirds the length of the superior, gradually acumi- 

 nate, its apex apparently entire, slightly upcurved if viewed 

 laterally ; above deeply concave and brownish black, beneath 

 black. 



Wings hyaline; membranule white; pterostigma black, 

 small (3^ millim. in anterior, shorter in posterior wings), 

 surmounting 2g cellules; neuration black; anterior wings 

 with 18 antenodal and 12 postnodal nervules, 2 supra-trigonal, 



