EEV. A. E. EATOX OX EECEXT EPHE:\IEEID.E OR MAYFLIES. 303 



Imago [Uviug), 6 ■ — Head Ijlack ; eyes blue. Prouotum reddish, with a median black 

 spot ; meso- and metanotum black, the sides of the thorax lighter. Abdomen greyish 

 brown [in the figure light yellowish olive, witli the joinings of the segments and oblique 

 stripes at the sides dark]. Setne fuscous. Fore legs black ; hinder legs fulvous. Wings 

 vitreous, with a slight brownish tint in the pterostigmatic region of the fore wing ; 

 neuration fine and black. Length of body 13, wing 13, sette 30 mm. 



Hub. Alpine Savoy, e.g. at a small stream descending from the Brevent above 

 Chamounix. [xlfter Pictet.] 



Heptagenia gemmata, Scopoli. 



Ephemera yemmata, Scop., Eut. Carn. 26i, pi. xxxviii. 683 [wretched fig.] (1763) ; Miill., Zool. Dan. 

 Prodr. 143 (1776) ; YiU., C. Linii. Ent. iii. 22 (1789) ; 01., Eueycl. Meth. vi. 431 (1791); Etn., Traus. 

 Eut. Soc. London (1871) 156 note; Hag., op. cit. (1873) 406. 



Imago {dried), $ . — Corpus rufum. Incisurse abdominis marginibus flavicantibus. 

 Long. 17 mm. 



Sab. Circa aquoDductum Fodinarum Idrensium. [After Scopoli.] According to 

 Dr. Hagcu (1873) this species is related to Ecdgunis veiiosus. 



Species, some of which have been published elsewhere during the 

 progress of this work, axd others now first published. 



The following species ought to follow Ciuiqjsnrus dorsalis, p. 42 : — 



Campsubus Wapp.ei, Weyenbergh. 



X Ephemera Wappcei, T\'e3'enb., Tijdsch. v. Ent. xxvi. 1882-3, p. 159, pi. x. 1 (1883) [wings]. 



Adidt. — Head light yellowish brown ; eyes small, black. Pronotum somewhat darker 

 than the head ; mesonotum [during life) yellow, changing {when dried) to yellow-brown ; 

 metanotum often somewhat darker. Abdomen above greyish yellow, becoming gradually 

 darker and sometimes approaching black posteriorly; venter yellowish grey throughout ; 

 the two appendices very pale, the "palpen" darker. Legs yellow or greyish yellow. 

 Wings transparent, but rather dull ; fore wings along the costal border brownish grey 

 through the colouring of the subcosta and radius. 



In the S the abdomen posteriorly is rather darker above than it is in the c? . Length 

 of body 13 or under, wing 18, setae 6 40-43 mm. 



Rob. Cordova, Argentine Republic. [After Weyenbergh ; condensed translation.] 



Campsurus Holmbergii, Weyenbergh. 



X Ephemera Holmbergii, Weyenb., Tijdsch. v. Eut. xxvi. 1882-3, p. 160 (1883). 



Adult. — Vertex of head very dark between the black eyes. Thorax and abdomen very 

 largely overspread above by dark grey markings approaching sepia-brown, the remaining 



