1949] 
Cheng — Mecoptera 
149 
of the genital segment of the female enables its easy 
recognition. The position of this species in the above 
grouping is not determined. 
Panorpa pusilla n. sp. 
Figures 37, 38, 52 
Vertex yellow anteriorly with a black spot enclosing 
ocelli, sooty brown posteriorly with a median quadrangu- 
lar plate; rostrum uniformly yellow; thorax brownish 
yellow dorsally, yellow laterally, meso- and meta-notum 
with sooty brown markings on each side ; abdominal 
segments sooty brown dorsally, yellow laterally and ven- 
trally. Fore wing: length, 1.8 mm.; width, 0.28 mm.; 
membrane yellow, markings sooty brown; pterostigmal 
hand complete, with a complete basal branch and a sepa- 
rated apical branch; basal band complete; apical band 
represented by two prominent bands, the inner one nar- 
row, being parallel to the pterostigmal band, the outer 
one including the wing apex; basal spot situated on the 
bind margin of wing; marginal spot very large; ptero- 
stigma not very prominent. Hind wing : length, 0.95 mm. ; 
width, 0.28 mm. ; similar to fore wing, except that the 
basal spot on the bind margin of wing is entirely lacking. 
2 genitalia : subgenital plate elliptical, with a slightly dis- 
tal emargination ; the plate of internal skeleton small, the 
posterior arms of the plate large, twisted at the middle, 
the axis short and slender, not extending beyond the 
plate. 
c? unknown. 
Holotype ( 2 ) : Mt. Taipai, Shensi, June, 1942; Io Chou; 
in the Museum of Comparative Zoology. Paratype: 1 2, 
same collecting data as holotype ; in my own collection. 
This species, having yellowish wing membrane differs, 
from the other described species by its very small body 
size, wing markings and the peculiar shape of the genital 
segment of the female. The position of this species in 
the above grouping is not determined. 
