118 (October, 
ON CERTAIN BRITISH HEMIPTERA-HOMOPTERA. 
BY JOHN SCOTT. 
(Continued from page 76). 
ReEvISION OF THE FamiLy CrxD2Z. 
We have no nearer relatives of the Delphacide in England than the 
Cixiide ; (nor are there any, as far as I am aware, on the Continent), | 
and even their relationship is not of the closest kind, the shape of the 
face with its keels being the strongest outward and visible sign of it. 
As in the Delphacide, so in the Cixiide, many of the species are 
exceedingly like to each other, and this has led to great confusion. 
Authors have not known what to do with them, and so they have been 
separated by one, put together by another, and finally mixed up almost 
indiscriminately. But here again the processes attached to the genital 
segment of the males serve as a simple but great guide. They are not 
shaped as in the Delphacide, neither are they placed as in that family, 
but are situated on the sides and project beyond the end of the seg- 
ment, and support the tube ; and, for general purposes, I have denomi- 
nated them “claspers.” Attached to the diagnoses of the species will be 
found a drawing of some two or three of them, showing the differences 
of structure, and which, I hope, will be considered useful. 
Of the nine species enumerated by Curtis, in his British Entomo- 
logy (673), five only remain, when the varieties have been disposed of ; 
and of the four described by the Rev. T. A. Marshall, in the Ent. Mo. 
Mag., Vol. i, pp. 154 and 155, musivus, Germ., must be sunk, as the 
insects in-Mr. Douglas’ collection, and from which the description was 
made, are stigmaticus, Lat. C. musivus, has not as yet, I believe, been 
found in this country. But Mr. Marshall gives cunicularius, L., and 
stigmaticus, Lat., as varieties (a and d) of nervosus, L.; and, as these 
are good species, his number is increased by one, and so reaches that 
of Curtis. By the time this paper shall have been completed, I shall 
have described 10 species, divisible into two genera, Oliarus and Cixius. 
Family CIXIIDA. 
Oixiide, Stal, Hem. Afr. iv, 129. 
Dictyophoride, Kirschb., Cicad. 11. 
Head not produced in front. Antenne short, inserted at some distance below the 
eyes, lst joint concealed, 2nd short, sub-globose. yes faintly sinuate beneath. 
Ocelli 3 or 2. Elytra membranous, nerves generally granulated. Tibiew, 3rd 
pair with two or three spines, and without a moveable spur. Abdomen, 1st and 
2nd segments sealed together. 
