1881 .] 
191 
AN ANNOUNCEMENT OF NEW GENERA OF TIIE EPHEMERID2E. 
BY THE EEV. A. E. EATON, M.A. 
Names for some new genera being required in the lettering of 
plates to illustrate my forthcoming work on the Ephemeridce, I am 
anxious to establish them. It will be sufficient to characterize the 
genera concisely, reserving detailed descriptions of them for the con- 
templated monograph. The admeasurements given in the descriptions 
of genera, though exact, should, for all practical purposes, be regarded 
as only approximate : they are only necessary in the absence of 
illustrations. 
Elassoneuria, n. g. 
Allied to Oligoneiirici. Wing-membrane dull or satin-like ; fore- 
wing with three longitudinal nervures, of which the hinder two are 
forked, and with a short, free, epinotal prolongation of the membrane 
at the wing-roots. Caudal set® of ? 3, subequal to one another and 
about one-third as long as the body. Type, JE. Trimeniana (in Oligo- 
neuria) , McLach. Distrib., S. Africa. 
Spaniophlebia, n. g. 
i 
Allied to Laehlania. "Wing-membrane clear neutral tint, “ shot ” 
with blue ; fore-wing with five or six obvious longitudinal nervures, of 
which the hinder two are forked (the pobrachial deeply so), also with 
several series of cross-veinlets disposed transversely, and with a short 
free prolongation of the membrane at the peak of the mesonotum. 
Eore-tibia of £ about as long as the femur ; 1st tarsal joint longer 
than the next. Caudal setae 2. Type, 8. Trailice , n. sp. Distrib., 
Tropica] S. America. 
Spaniophlebia Trailice , n. sp. 
Imago, 3 , in spirits, and dried ; thorax atro-piceus ; abdomen sub-piceous, with 
paler joinings ; caudal setce pitchy-black, with testaceous pilosity ; forceps as in 
Lachlania. Ncuration black ; fore- wing with pobrachial nervure forked before the 
middle, and with cross-veinlets, as far as the prsebrachial nervure only (another 
species has the furcation at the middle, and more numerous cross-veinlets extending 
as far as the anal nervure), viz. : about twenty-five in the marginal, two to five in 
the sub-marginal, one or two in the next area ; the sub-costa towards the tip, and 
the neighbouring cross-veinlets, strongly bordered with dark fuliginous. Legs black 
with pale margins. 
? unknown. Long. corp. 9, al. 10, set. 8 mm. 
Hab. : Sao Paulo, Eio Solimoes, September and November (Mus. 
McLach.). 
The other species (from Ecuador) has pubescent $ set® about 
times as long as the body. 
