, | 
168 Mr. R. M‘Lachlan ox the 
The species known to occur in Japan may be referred 
to the following families:— | 
EX\phemeride, 5 species. Mantispide, 1 species. 
Perlide Quis, Hemerohiide 1 ,, 
Sialide ae Osmylide 4. 5 
Raphidiide 1 ,, Chrysopide 4 ,, 
Myrmeleonid@5 Panorpide 10 ,, 
Ascalaphide 2 ,, 
With these limited materials it would be unsafe to 
generalize upon any faunistic peculiarities presented by 
them. One of the most interesting facts is the occurrence 
of an endemic species of the restricted genus Ascalaphus, 
a genus that has its head-quarters on the northern shores 
of the Mediterranean, although one species is known to 
occur in Mongolia and Eastern Siberia. The most 
striking feature is the number of interesting Panorpide, 
including forms that have rendered necessary the con- 
struction of two new genera; and large as the number 
already is, it may be considered practically certain that it 
only represents a tithe of the species that exist. 
EPHEMERIDZ. 
EPHEMERA, Linné (restricted). 
EF. orientalis, sp. nov. 
Pale greyish-yellow, a long black streak on each side 
of the mesonotum. Abdomen above narrowly-blackish at 
the sutures; the first three or four segments and the two 
apical ones without longitudinal lines ; the intermediate 
with five black longitudinal lines, whereof one is straight 
and central, with two on each side slightly curved; tails 
yellowish, the basal portion unannulated, afterw ards with 
narrow-blackish sutural annulations; appendages rather 
short; the two apical joints short; penis divided to its 
base, the two lobes dilated at the apex and there approxi- 
mate; the underside of the abdomen with only two lines 
(one on each side, and those straight) on the intermediate 
segments. Legs pale yellow, the anterior tibiz and tarsi 
fuscous ; the tarsi transversely corrugated. Anterior wings 
vitreous, with a yellowish tinge; neuration blackish, 
costal veinlets incrassate and deep black; the nodal 
veinlets strongly margined with blackish, and there are one 
or two other blackish points ; posterior wings immaculate, 
but with a rather broad pale-greyish border. (¢ imago.) 
[ixpanse 32 mm. 
In the Leyden Museum; captured by Von Siebold. 
