XX 
Mr. Miiller communicated the following notes on the discovery, by 
Dr. Emile Joly, of Toulouse, of a nymph which he announced to belong to 
a species of Oligoneuria : — 
" Having for the last fifteen years endeavoured to find the unknown early 
conditions of Oligoneuria Rhenana, Imhoff, but so far without success, it is 
a matter of no little consolation to me to be enabled, through the courtesy 
of my valued friend Dr. Emile Joly, to announce, on his behalf, to the 
Society, his important discovery of the first nymph known in the genus 
Oligoneuria, and belonging to the species named by him ' Garumnica.' For 
this purpose I translate here Dr. Joly 's communication from the French 
MSS,, agreeably to his desire. My friend writes, 'I have the honour of 
addressing to the Entomological Society of London two drawings, to my 
knowledge entirely unpublished, and representing (fig. a), the upper side,* 
FiK. B. 
(The above are three times the natural length.) 
* This nymph, like the one of Palingenia Roeselii {vide Mem. de la Soc. des 
Sci. Nat. de Cherbourg, t. xvi.), with long cilite only on the internal border of the 
anterior legs, presents, like the last, above the thorax and in pairs overlying each 
other, /our corneous sheaths intended to lodge the folded-back (repliees) wings of the 
insect up to the moment of its passing to the subimago state. It is therefore not, 
as Imhoff supposed, by a kind of division, by a spontaneous Assuring, that the four 
wings are formed, which are so easily recognised in the imago state of the insect, 
but rather that if sometimes there seem to exist only two wings, it is, as Hagcn had 
at first deduced theoretically, because there exists a perfect attachment by simple 
agglutination of the posterior border of the fore wing to the anterior boi'der of the 
hind winK. 
