94 Mr. F. P. Pascoe on the Names applied 
ribands of spawn are fixed to stones and rocks, and compara- 
tively rarely to substances which could be easily transported 
by the waters. Although indeed we may be acquainted with 
or may easily imagine numerous methods of dispersal and dis- 
tribution, there must evidently be many others we do not 
dream of, which are nevertheless common and effective. 
I need hardly add that I have careful drawings, as well as 
specimens, of all the above-mentioned species of Nudibranchiata, 
which I hope to be able to publish at some future day. They 
have already (the drawings at least) had the advantage of 
being inspected by Mr. A. Hancock, who has kindly given me 
some valuable hints concerning them. 
14 Gloucester Place, Greenwich, 8.E. 
XV.—Remarks on the Names applied to the British Hemiptera 
Heteroptera. By Francis P. Pascoz, F.L.8. &e. 
Messrs. DoueLas and Scott having kindly undertaken to pre- 
are for the Entomological Society a list of British Hemiptera, 
Theat like to make a few observations on the names ph edo 
by them, or rather on the principles which led to their adoption, 
in their well-known work*. In no other order of Insects is 
there so great a discrepancy in the nomenclature—Fieber, Flor f, 
Dallas, Birensprung, Dohrn, and others agreeing only to differ. 
It will therefore be useful, I think, to examine the causes which, 
to a certain extent, have led to this result. The study of the 
Hemiptera is limited at present to comparatively few ento- 
mologists; and until ‘ unnecessary genera’”’ shall have been 
ignored by common consent, no uniformity can be hoped for. 
Putting this cause aside as one that will gradually disappear, 
there remain two faulty principles at work, and, ip, 
enough, among hemipterologists only, viz.:—(1) the applica- 
tion of the generic names of the older authors to obscure, some- 
times extra-Huropean species, instead of to the larger number 
of better-known species which those authors must have had 
most prominently before them, thus rendering the use of new 
names necessary; and (2) giving new names to such genera 
as were formed by the union.of two or more genera of a pre- 
ceding writer. ' 
As an example of the first of these principles, we will take 
the old name of Cimex, under which Linnzus was content to 
* The British Hemiptera, vol. i.: Hemiptera-Heteroptera. 1865 (Ray 
gous (La 
- + I have not quoted this author because he uses a trinomial nomencla- 
ture which is rather difficult to explain. 
