1881 .; 
259 
2G5 ; xv, p. 12). Dr. Adler has just published a very extended memoir on the same 
subject in the “ Zeitsclirift fur wissenschaftliche Zoologie,” Bd. 53, pp. 151 — 246 
(February, 1881), in which he gives the results of his experiences concerning a very 
laige number of oak-gall Cynipidce, and illustrates his memoir by two very excellent 
folded cliromo-lithographic plates with figures of the galls, in which the latter are 
delineated with a truth to nature rarely equalled. It is not pretended in this short 
notice to fully detail the results obtained by Dr. Adler, and the modus operaruli. 
The results amount briefly to these : — 
Parthenogenetic Brood. Sexual Brood. 
Neuroterus lenticularis is changed to Spathegaster baccarum. 
99 
Iceviusculus 
99 
99 
albipes. 
99 
numismatis 
99 
99 
vesicatrix. 
99 
fumipennis 
99 
99 
tricolor. 
Aphilotrix radicis 
99 
Andricus noduli. 
99 
Sieboldi 
99 
99 
testaceipes. 
99 
corticis 
99 
99 
gemmatus. 
99 
globuli 
99 
99 
injlator. 
99 
col laris 
99 
99 
cur vat or. 
99 
fecundatrix 
99 
99 
pilosus. 
99 
callidoma 
99 
99 
cirratus. 
99 
Malpighii 
99 
99 
nudus. 
99 
autumnalis 
99 
99 
ramuli. 
Dryophanta scutellaris 
99 
Spathegaster Taschenberg 
99 
longiventris 
99 
99 
similis. 
99 
divisa 
99 
99 
verrucosus. 
Biorhiza 
aptera 
99 
Ter as terminalis. 
99 
renum 
99 
Trigonaspis crust alis. 
Neuroterus ostreus 
99 
Spathegaster aprilinus ? . 
In the following only one brood, and that parthenogenetic, and not dimorphic, 
was obtained, viz. : Aphilotrix semilunatus, A. marginalis, A. quadrilineatus, and 
A. albopunctatus. 
There are sufficient materials in the list above given to excite the astonishment 
of entomologists, and to induce them to follow up the author’s observations, not only 
on the species named, but also on other gall-flies. 
Perhaps one of the most remarkable couplings is that of Biorhiza aptera (the 
root-gall of the oak) and Ter as terminalis (the common oak-apple) ; the insect of 
the former is always apterous, and must occasionally climb 50 or 60 feet in order to 
deposit its eggs in the twigs on which the “oak-apples” are produced. 
The forms are divided into the Neuroterus-gvoup , the Aphilotrix- group, the 
Dryophanta- group, and the Biorhiza- group. 
The memoir concludes with an examination of the anatomical structure of the 
ovipositor in Cynipidce and of the manner in which the eggs are laid. 
All Entomologists interested in this question should study this memoir : the 
plates will enable them to identify most (if not all) of the British oak-galls, and 
will perhaps lead to the discovery of others. — R. McLachlan, Lewisham : 14 th 
March , 1881. 
Sehirus 2-guttatus and other Hemiptera near Hastings. — On Saturday last, my 
brother and self took from moss, growing in a good-sized wood at Gfuestling, a nice 
series of the above. Believing it to be uncommon, I thought it was worth while 
