PACHTEH1XA. 347 



longitudinal stripe ; sides of thorax rather lighter yellow; sterno- 

 pleurse with a tawny brown, semi-transparent spot on the upper 

 and lower part, leaving the middle concolorous. Abdomen normally 

 bright or deep yellow, with, in the male, a longitudinal median 

 black stripe of moderate width, composed of a row of elongate 

 spots more or less united to one another, the black colour towards 

 the tip spreading more or less over the whole dorsal surface ; 

 a narrow lateral stripe similarly formed. In the female, the 

 abdomen is wrinkled and bears a large, more or less square, 

 blackish spot on each segment, generally of sufficient size to form 

 an apparently continuous dorsal stripe, but the posterior margin 

 itself of each segment is yellow and well denned ; there are also 

 numerous irregularly placed small black spots between the 

 dorsal stripe and the rather broader (than in the male) lateral 

 stripe on each side. Belly similar to dorsal surface. Genitalia of 

 male very much as in P. serricornis, but a distinct brown side plate 

 is present, and a small yellow V-shaped ventral plate, protecting a 

 somewhat conspicuous keel-like protuberance immediately above 

 it, joined to the large swollen base of the claspers. Legs variable, 

 normally yellow, the femora becoming brownish on the apical 

 half, sometimes quite blackish on that portion ; but often the 

 femora are mainly yellowish, with an indistinct brownish or 

 blackish ring of varying width at the tip ; the tibia3 vary from 

 yellowish to brownish; the tarsi generally brownish yellow or 

 brown. Winys pale grey ; the forks of the upper branch of the 

 fourth longitudinal vein vary in their emergence from the discal 

 cell, sometimes being distinctly separated, sometimes issuing 

 simultaneously, and sometimes forming a short petiole ; stigma 

 moderately large, varying from pale yellow to brown ; subcostal 

 cell varying from, yellowish to rather dark brown. Halteres 

 yellow. 



Length 9-14 millim. 



Described from a lengthy series in the Indian Museum from 

 Darjiling, 23-28. v. 10 (Brunetti), o-10.viii.09 (Paiva), 1. x. 08 

 (Brunetti); Kurseong, 19-24. vi. 10, 5.vii.08, 5-8. ix. 09, and Bhim 

 Tal, 17-19. ix. 06 ( Annandale) ; Mussoori, 22. v. 05 (Brunetti), and 

 Gangtok, Sikkim, 22.V.05. In the Vienna Museum is a female 

 from Sikkim. 



Type, <S and ? i the Indian Museum. 



Apparently the commonest species to be found in the hilly 

 parts of North India, but no specimen has been received from 

 the plains or even from a hilly locality apart from the Himalayas. 



250. Pachyrhina gamma, sp. nov. 



2 . Head : vertex nearly one-third the width of the head, 

 orange-yellow, with a dark median narrow line ; frons yellow, 

 with an inverted black Y-shaped mark reaching from between 

 the bases of the antennas to the proboscis ; the latter yellowish 



