1881.] 191 



AN ANNOUNCEMENT OF NEW GENERA OF THE JEPSEMERID^. 

 BY THE REV. 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 Oligoneuria. "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 setae of $ 3, subequal to one another and 

 about one-third as long as the body. Type, E. Trimeniana (in Oligo- 

 neuria), McLach. Distrib., S. Africa. 



Spaniophlebia, n. g. 

 Allied to Lachlania. 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 a!t the peak of the mesonotum. 

 Fore-tibia of $ about as long as the femur ; 1st tarsal joint longer 

 than the next. Caudal setae 2. Type, S. Trailice, n. sp. Distrib., 

 Tropica] S. America. 



Spanioplilehia Trailice, n. sp. 



Imago, S , in spirits, and dried ; thorax atro-piceus ; abdomen sub-piceous, with 

 paler joinings ; caudal seta3 pitchy-black, with testaceous pilosity ; forceps as in 

 Lachlania. Neuration 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. 



Hal. : Sao Paulo, Eio Soliinoes, September and November (Mus. 

 McLach.). 



The other species (from Ecuador) has pubescent £ setae about 2\ 

 times as long as the body. 



