132 
[November, 
refer to Dr. Loew’s article, “ Revision der Familie der Blepharoceriden 
(Schlesische Zeitschr. f. Entomol. Neue Folge, vi, 1877), and to my 
“ Bemerkungen,” &c., in the Deutsche entomol. Zeitschr., 1878, pp. 
405 — 41G. Only I beg that, in the latter article, p. 406, line 11 from 
top, after the word Hinsicht , the words ausserhalb der Familie der 
Cyrtiden should be inserted. 
Heidelberg : October , 1880. 
DESCRIPTION OF THE NYMPH OF ARYTuENA GENISTAS, LAT. 
BY JOHN SCOTT. 
Our knowledge of the earlier stages of the insects comprising the 
Family Fsyllidce has, until within the last few years, been of very 
limited extent, and whether this has arisen from the supposed diffi- 
culties attendant upon rearing the creatures, or from what other cause 
or causes I cannot say. My experience in rearing them has been quite 
a pleasure, and without the long anxious waiting attached to the 
rearing of Lepidoptera. The system I adopt is precisely similar to 
that adopted by me when I used to breed Micro- Lepidoptera, viz. : — 
a small flower-pot filled with earth, into which is placed a portion of 
the food-plant, the young are then put upon it, and the whole covered 
by a glass cylinder fitting into the rim of the flower-pot. Through 
the cylinder their actions may easily be observed, as also their habits. 
Some species live in a crypt formed by the deformation of the leaves 
occasioned by their attacks, and these are generally enveloped in a 
fine, flossy, cottony substance, whilst others roam about singly ; perhaps 
the most active of all the young forms I have met with are those of 
Arytcena genistas, Lat., the subject of the present paper, and they are 
included in the latter group. 
The perfect insect had long been known in our collections under 
the name of Psylla spartii, Hartig (Germ. Zeit., iii, 1841), until I, in 
my Monograph of the British species of Fsyllidce, published in the 
Trans. Ent. Soc. for 1876, changed it to that of Arytcena ulicis , Curt., 
B. E., 565, 22a (1835), his name having priority by some years. It 
stood thus until 1879, when Dr. Franz Low recognised it as the Psylla 
genistce, Latr., Hist. Crust, et Ins., p. 384 (1804), and so he named 
and described it in the Verb. z.-h. Ges. Wien, p. 596. At the end of 
the synonymy, he adds “ Die Jugendstadien sind nock unbekannt .” 
This expression set me to work to try and discover the earlier stages 
of this, one of the commonest species we have in England, or, perhaps, 
I may say, on the Continent. For several days, at the end of August 
