146 
Psyche 
[Dec. 
slender, each consisting of a single stalk which is some- 
what twisted and pointed at its tip ; preepiproct slender, 
the distal incision being almost quadrate ; apical proces- 
ses of sedeagus somewhat prolonged on its distal outer 
margins, lateral processes well-developed. $ genitalia: 
subgenital plate elongated, slightly emarginate posteri- 
orly ; internal skeleton large, the plate distinctly concave 
at its base, with a pair of sharp posterior arms and a pair 
of anterior side plates; axis well-developed, extending 
beyond the plate for nearly one-third its length. 
Holotype (<?) : Mt. Taipai, Shensi, June, 1942; Io Chou; 
in my own collection. Allotype (?) : Same collecting data 
as holotype; in the Museum of Comparative Zoology. 
Paratype : 1 ?, same collecting data as holotype ; in my own 
collection. 
This species, belonging to the davidi group, differs 
from the others in its wing markings ; the basal band is 
as broad as in cladocerca Navas, but its pterostigmal band 
is quite different. The structure of male genitalia, espe- 
cially the six spines on the distal coxopodites, makes its 
recognition easy. 
Panorpa semifasciata n. sp. 
Figures 19, 20, 21, 53 
Body entirely sooty black; vertex black; rostrum uni- 
formly black; the middle part of 8th abdominal tergite 
slightly prolonged into a band-like prolongation, the 9th 
abdominal tergite very broad, its lateral borders bent ven- 
trad to embrace the posterior part of subgenital plate in 
ventral view. Fore wing : length, 14 mm. ; width, 3.5 
mm. ; membrane light yellow, markings sooty brown ; 
pterostigmal band incomplete, with an interrupted nar- 
row basal branch; apical band small, with two hyaline 
spots; pterostigma prominent. Hind wing: length, 12.8 
mm.; width, 3 mm.; similar to fore wing, except that the 
basal branch of pterostigmal band is greatly reduced. ? 
genitalia: subgenital plate broad, with strongly sclero- 
tized median part and less sclerotized lateral borders, 
apex of subgenital plate rounded, less sclerotized, fur- 
