56 Rev. A. E. Eaton’s Monograph 
of July, on a Rhine steamer; but, unfortunately, I 
neglected to make a memorandum of the posture of the 
subimago; they were blown along the deck of the 
steamboat helplessly, being unable to maintain their 
footing. 
Oligoneuria pallida. 
(Genitalia, Pl. III. fig. 8. a-c; caput, fig. 8.) 
O. rhenana, var. pallida, Hag. 1855. 
Imago, s. s. O. rhenane similis esse videtur. Dr. 
Hagen forcipem delineavit; sed figura a forcipe O. 
rhenane longe discrepat. 
fiong. corp. ¢ 9, 9 7; set. 3 10, 9 4; expral @ 
20, 9 24 mm. 
Hab.—Hunegary. 
I have some doubt about the correctness of Dr. 
Hagen’s figure of the forceps; for the relative propor- 
tions of the joints resemble those of the forceps of 
Baetis or Ephemera. There is great danger of misrepre- 
sentation being the utmost that one can extort from 
dried specimens. 
Oligoneuria Trimeniana. 
(Processus ventralis penultimi segmentorum, ¢, Pl. 
Terie O8.5) 
O. Trimeniana, McLach. 1868. 
Imago, v. s. s. ?. Caput et thorax lutei, pectore 
lutescenti. Ale pellucida, venis fumato-albis. Pedes | 
albicantes, femoribus furfurosis. Sete cretacez, ad junc-} 
turas apices versus sub-pilose. Ovee virides. 
Long. corp. ? 12, exp. al. 415 mm. 
Hab.—Mapulnulo Mission Station, Umroti District, 
Natal. March. 
The wings have a satiny lustre. 
{ 
Genus CAMPsuURUS. 
(Ala antica, Pl. I. fig. 4.) 
Ephemera, Perch. 1836; Palingenia, pars, Pict. 1843-6 ; 
Campsurus, Etn. 1868. 
Imago. Oculi integri. Ale quatuor, anticee reticulo 
subtili. Pedes debillimi, unguibus longis tenuibus obtusis 
f 
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4 
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