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pygium wîlli a conspicuous globular appendage on the caudal niai-gin of 

 ihe ftiglilli stérilité. 



Mdie. — Length, i3 mm.; wing, ii.5 mm. 



Roslrum and palpi black. Antennœ dark brownish black ihroughout. 

 Headblack. 



Prolhorax and mcsothorax entirely deep velvety black. Haltères 

 brownish black. Legs with the coxaî and trochanters black; femora 

 black, the bases obscure yellow, least distinct on the fore femora , on the 

 jiosterior femora very broad and conspicuously brighl yellow, occupying 

 a liltle more than the basai half ; remainder of the legs black. Wings 

 wilh a faint brown tinge; cell ist Ri , the celle beyond the cord and cell 

 2ud A paler, more grayish; the small, oval stigma dark brown; a faint 

 brown cloud along the deflection of /?i + 5 and r-m; veins dark brown. 

 Venation : Rs arcuated; cell Mi with a short peliole, this a little longer 

 ihan r-m; m~cu distinct. 



Abdomen with segments one to four orange; segments five lo nine 

 black. The hypopygium is badly dislorled by flallening. Minlh lergite 

 with a V-shaped notch, the lobes wilh abundant long black hairs. Pleur- 

 al appendages comparatively small, the surface microscopically reticulate, 

 the most conspicuous élément a heavily chitinized , shiny black blade that 

 terminales in a short, curved hook, near the base with a smaller, acute 

 point directed iaterad. Outer pleural appendage very long and slender, 

 direcled dorsad , the base on the cephalic side densely clolhed with short 

 yellow' hairs. Caudal margin of the eighlh slernite wilh a conspicuous 

 subglobular appendage that is covered with short hairs. 



Habitai. — Southwest China. 



Flolotype, c3*, Province of Kouy-lchéou (Kwei-chow), San Chouen, 

 September 1918 (Père Cavalerie). 



Type in the collection of the Paris National Muséum. 



This very distinct PseUiophora is named in honor of the coUector. 



