EEV. A. E. EATON ON EECENT EPHE]\rEEID.E OR MAYFLIES. 25 



Palingbnia ftjliginosa, Georgi. 



Ephemera fuliginos a, Georgi, Geogr.-physik. u. naturhist. Beschr. d. russischen Reichsj Th. iii. vi. p. 324 

 (1802). 

 Palingenia fuliginosa, ! Hag., Trans. Ent. Soc. London (1873), p. 392. 



Adult {(hied) 6 . — Wiugs deep raw-umber brown, translucent, dull. Compared witli 

 P. lonrticanda, the sinuous first axillary nervure (9') of the fore wing is more strongly 

 arched towards the inner margin ; and the first of the subsidiary nervures enclosed by 

 the fork of the anal nervure (8), instead of being diffuse, imitates on a small scale with 

 its branches the same main nervure and its branches in an appreciable manner. Pro- 

 thorax above somewhat pale ochreous, the remainder of the thorax chiefly brown-ochre. 

 Ab iomen above rather darker than the wings ; the pleura and venter, forceps and sette, 

 pale yellow-ochre. Sides and underside of thorax and the femora slightly deeper in tint 

 than the venter, the tibire and tarsi tinged with ashy-grey ; vertex of head brown-ochre, 

 with the orbits of the ocelli blackened. Approximote admeasurements : — length of 

 body 25, wing 25, setae upwards of 55 mm. 



Hah. The Caucasus. 



Subgenus Anagenesia. 



Adult. — Prsebrachial nervure (6) of the fore wing forked before the middle ; three 

 conspicuous sets of longitudinal nervures proceed in pairs to the terminal margin (at i', 

 5 & 6, and 6^). Pore tarsus of d shorter than the femur. Setae 2, in 6 upwards of 

 three times as long as the body, in ? about half as long as it. 



Nym])h. — Divisions of the abdominal tracheal branchite, of uniform shape, unequal; 

 each division is a narrow membranous lamina folded length-wise, fringed with short 

 simple fibrils, to which are distributed colourless air-vessels from a dark median trunk. 

 In a nymph from Ceylon the clypeus has a globular tubercle in the middle of its 

 front edge ; there is a triangular tubercle above the insertion of the antenna, and 

 one in a line with the eye on each side of the jirothorax. The bearding of the 

 fore femur is restricted to a rounded patch at the base beneath, and is almost erect ; 

 that of the tibia is spreading, and clothes the sides and the front, and in the latter 

 position a scanty series of long tactile hairs stands erect. In the hinder legs the femoral 

 patches are insignificant, the tibia and tarsus are ciliated outside, and the tibia is shortly 

 and densely pilose on its distal border, and towards its extremity beneath. Antennae 

 setaceous, shorter than the head; the first three joints longer than any of the othei-s, 

 which are almost nude ; the second joint furnished with a dense patch of hair outside. 

 Labrum small. Mandibles short and stout, distally pilose, and with a curved patch of 

 long spreading hair near the base on the outside ; the crown, somewhat wedge-shaped 

 and irregularly dentate, is remote from the molar protuberance. Lacinia of the upper 

 maxilla flattened and ol)liquely truncate, pungent, and crowned with a dense beard, also 

 bearded within below the point, the last line of hair shortly and obliquely decurrent upon 

 the outside; first joint of the palpus nude; second joint much the longer, slightly 

 incurved towards its acute extremity, and densely pilose nearly all over. Labium and 



SECOND SEKIBS. — ZOOLOGY, VOL. III. 4 



