EEV. A. E. EATON ON EECENT EPHEMEEID.^ OR JIATELIES. 



325 



extensively diffused in the pterostigmatic region as it is in most specimens of the other 

 sex. The hind wing is faintly amber- tinted to a considerable depth along the grey or 

 blackish apical or terminal margins. In the fore wing the lighter portions of the longi- 

 tudinal nervures are rather paler than in the c? , and the great cross- vein is paler than 

 the cross- veinlets ; the caudal setae are lighter in colour. Length of setae d im. 25-35, 

 ? im. 25 mm. 



Sab. North Carolina (M'Lach. Mus.). For comparison with the tabulation of propor- 

 tional lengths of tarsal joints of representatives of other genera given above at p. 230, 

 the corresponding admeasurements of the tarsi of adult specimens of this species are 

 here subjoined : — 



In the fore leg of the cT the tarsus is about If as long as the tibia ; in the ? the fore 

 tarsus is about # as long as the tibia. 



P. 268, 1. 10 from top, /or Subz. read Sulz. 



P. 270, lines 15 to 8 from bottom, note To H. cierulans belongs all that relates to H. 

 gallica, given below at pp. 272-273. I have lately examined specimens of H. ccerulans 

 in Mr. Albarda's collection named by Herr Eostock, and can now vouch for the identity 

 of S. gallica with ccerulans. 



P. 272, 1. 5 from top, for gallica, sp. nov., read {cjallica, Etn. MS.=] c^rulans, 

 Rostock. 



P. 272, 1. 7 from top, after '' Heptagenia" read ccerulans, ! Rostock, Jahresb. d. Ver. 

 f. Xaturk. Zwickaxi, 1877, p. 89 (1878). — Heptagenia. 



P. 273, lines 14 from top, after " Hub.'' insert Weisseritz, near Dretschen, Saxony 

 (Rostock). 



P. 273, lines 16-18 from top, omit all references relating to S. volitaus. 



P. 274, dele lines 22-24 from top, and lines 1-4 from bottom. Note H. volitans 

 is an Ecdyurus described at p. 291. 



P. 306, 1. 6 from bottom, /or Prof read M. 



P. 307, 1. 18 from top, /or Retourna read Retourner. 



P. 307, L 11 from bottom,/or 2; (?) sp., read ; (?) 2 sp. 



P. 309, 1. 5 from bottom,/;/- (3) read (8). 



P. 315, 1. 20, for Colohurus, read Coloburiscus. 



