EEV. A. E. EATOX ON EECEXT EPHEMEEID.^ OE MAYFLIES. 287 



Imago [dried], 6 . — Notum brownish ochre or reddish brown, sometimes darker behind. 

 Fore leg in opaque view uniformly piceous ; 1st tarsal joint of normal length. Ptero- 

 stigmatic portion of the marginal area of the fore wing dai'kened more or less. Abdomen, 

 in opaque view, usually marked at the sides with dark triangular spots, each occupying 

 the lower half of the flank of the dorsum, but leaving the pleurae pale ; in transmitted 

 light the spiracles become translucent, and a pale obovate space appears inside each of 

 the dark triangles above the pleuras. In diseased specimens, such as are infested with 

 internal parasites, the dorsum is commonly of a uniformly dark colour, with opaque 

 joinings, excepting that in segments 4-7 the extreme bases of the segments on each side 

 may be nari'owly translucent. {Living.) — Upper portion of the eyes either greenish 

 bistre-brown, or olive-green ; a burnt-umber-brown line, edged above with bright yellow 

 separates this portion from a narrow greenish fuscous stripe along the lower orbit. Thorax 

 pitch-brown above, darker behind. Abdomen red -purple-brown above, with the joinings 

 of the segments opaque in the midst, and pale at the pleura3, and sometimes with scarcely 

 any indications of the usual dorso-lateral triangular markings ; venter spotless, paler than 

 the dorsum, and tinged in segment 9 with orange. Forceps black. Setee dull black at 

 the base, but sepia-grey with dark joinings nearer their extremities. Fore leg pitch- 

 black, with the trochanter rufo-piceous. Hinder femora dull light olive-grey, slightly 

 tinged at the edges and about the knee with rufo-piceous ; tibiae darker olive-grey ; tarsi 

 dull brownish black. Wings vitreous ; marginal area of the fore wing tinged slightly for 

 some distance from the roots with greenish yellow, and in the pterostigmatic region 

 with light blackish grey ; neuration piceous, pale at the roots ; tegulaj bright yellowish. 



S very similar. Length of body 9-12 ; wing 10-13 ; setae 6 im. 22-31, subim. 

 16, 2 im. 21 mm. 



Kah. Continental Europe from Saxony southwards to Central Italy. Common in 

 Val Anzasca near Ponte Grande at 1350 ft., 19th July ; also in the Apennino Pistojese, 

 both near San Marcello by the Limestre and its tributaries in the chestnut-wood below 

 Gavanina at 2150-2750 ft., and also in the Valle Sestajone at -1230 ft. [2nd August, 11 

 A.M., water 50° F.]. Specimens captured by Prof. Zeller in Carinthia during June 1867 

 are in ]\l''Lach. Mus., and being faded through damp and age, were until recently mis- 

 taken by me for a distinct species. I had (prior to inspecting specimens named by 

 Rostock in Albarda Mus.) always supposed the species named forcipula by the Swiss 

 entomologists to be identical with Ecdyurus flmninum — a view that might be contended 

 for ; but, adopting Herr Rostock's application of the name, I now give precedence to 

 forcipula over italicus. 



EcDYURUs BELLiEr.i, Ilageu. 



X Baetis Bellkri, ! Hag., Aim. Soc. Ent. Fr. (1860) 746. 

 Heptayenia BeUicri, ! Etn., Traus. Ent. Soc. London (1871) 15 1. 



Imago {dried), ? . — Wings vitreous, with piceous neuration, and with the pterostig- 

 matic region of the fore wing darkened. Fore legs piceous ; hinder legs testaceous with 

 fuscous tarsi. Setae piceous. Ventral lobe of the 9th abdominal segment entire. Length 

 of wing 14 mm. 



