1949] 
Cheng — Mecoptera 
153 
lar to fore wing, except that apical branch of pterostig- 
mal band, basal band, basal spot and marginal spot are 
entirely lacking. <? genitalia : genital bulb slender ; cox- 
opodites rather long, with a projecting apex; barpagones 
very slender, the outer margin slightly concave at the 
middle, inner margin with a smooth angle and a true 
basal lobe ; hypandrium rather long ; hypovalvae not flat- 
tened, broadened towar4s the apex, the basal portion 
wide apart, the median inner parts greatly prolonged 
upward and overlapping each other ; parameres appar- 
ently absent; preepiproct slightly narrow towards the 
apex, the distal portion bent laterad and caudad so as to 
embrace the proctiger; aedeagus very small, both the ap- 
ical and the lateral processes tootb-like, the basal part 
usually covered by a pair of elliptical membranous plates. 
$ genitalia : subgenital plate broad, with a wide U-sbaped 
distal incision; internal skeleton small, the plate being 
band-shaped, transversely elongated, the posterior arms 
of the internal skeleton lanceolate, extending laterad and 
reaching to the side margins of the subgenital plate, the 
axis small, fork-shaped, the distal portions of the forks 
jointed with the basal posterior arms closely. 
Holotype (<?) : Mt. Cbowkung, Yaan, Sikang; July 29, 
1939, F. Y. Cheng, Io Chou and Tein Ho Hei ; in my own 
collection. Allotype (?) : Same collecting data as holo- 
type, in my own collection. 
I take the liberty of naming this species in honour of 
Mr. Tein Ho Hei, who was so kind to me during our ex- 
pedition. 
This species superficially resembles caveleriei Navas 
in wing markings, but it can be distinguished by the 
greatly reduced apical branch of the pterostigmal band 
in the fore wing and the entire lack of this band in the 
bind wing. Another difference is the unforked R2a of 
this species as compared with the forked R2a in the re- 
described figure of caveleriei Navas by Esben-Petersen 
(1921, p. 83). However, the specific characteristics can- 
not be determined for certain until the structure of the 
9th abdominal segment has been studied. This species 
