PSYLLID;E, ArHIDIDiK. 
511 
PSYLLID^]. 
Rudow, Zur Kemitniss der Psyllodeil Norddeutschlands. ‘ Pro- 
gramm’of the Realschule of Neustadt Eberswalds: 1875, 4to, pp. 
1-14. 
A concise account of the structure and habits of the group, and brief 
descriptions of 2 species of Livilla. 2 of Arytcsna, 41 of Psylla, 28 of 
2'rioza, 11 of Aphalara^ 2 of RMnocola, and 1 of Livia ; including some 
new species. 
Thomas, F. Durch Psylloden erzeugte Cecidien an AEgopodium und 
andern Pflanzen. Z. ges. Naturw. (2) xii. pp. 438-44G. 
The abnormal growth termed Cecidium by the author is quite inde- 
pendent of the life of the larv^, and is exclusively caused by the deposit 
of the egg. This growth, attributed to the early stage of Psylla^ under 
the name of ‘ Cecidozoon,’ is described in jEgopodium podagraria, Chry- 
santhemum leucanthemum, Aposeris fcetida, Leontodon hastile, Rhamnus 
catharticus, Laserpitium siler, and Cera$tium semidecandrum. No perfect 
insect is referred to. 
Livilla callunoe^ sp. n., Rudow, 1. c. p. 7, N. Germany (on Calluna vul- 
garis). 
Psylla olivacea (on Ly thrum salicarid) and frontalis (on Vinca major) 
p. 8, nigricornis (on Populus tremula), sulfurea (on Evonymus), and 
geniculata (on Salix), p. 9, id. 1. c. N. Germany ; P. vittipennella, O. M. 
Reuter, Not. Fenn. (n.s.) xi. p. 333, Carniolia : spp. nn. 
Trioza punctinervis (on Acer campestre) and lepidoptera (on Alnus)^ 
p. 11, spp. nn., Rudow, 1. c. N. Germany. 
Aphalara crassinervis, sp. n., id. 1. c. p. 13, N. Germany (on jEJi/patonww 
cannahinuni) . - ’ ' 
Aphididji. 
Aphis sp. ?, from America, on roots oi Abies halsamica and A. /rasen; 
G. Holzner, C. R. Ixxx. p. 961. It has the same economy as Phylloxera^ 
J. Lichtenstein, tom. cit. p. 1022 [Zool. Rec. xi. p. 486]. 
Aphis carotoe. Epitome of a manuscript by Graells, containing de- 
scription of this new species, with observations on Phylloxera ; J. Lich- 
tenstein, Bull. Soc. Ent. Fr. (6) v. p. ccxviii. 
Adelges, Yallot. V. Signoret, Bull. Soc. Ent. Fr. (5) v. p. cxxxix., 
proposes to adopt this name for Chermes, to avoid confusion. 
Jlolzneria, g. n., J. Lichtenstein, Bull. Soc. Ent. Fr. (6) v. p. Ixxvi. 
Attacks roots ; differs from Tychea, Koch, by having a slight anal pro- 
longation, and in the length of its rostrum, which reaches beyond the 
abdomen in young individuals. For Pemphigus poschingeri, Holzner 
[Zool. Rec. xi. p. 486]. V. Signoret, 1. c. p. Ixxxviii., considers Holzner’s 
species may really be a Pemphigus, to which every Aphidian belongs 
which has 6 joints to its antennoe and 4 nervures to the wings, and there 
is no restriction in that genus to galls. Lichtenstein, 1. c. p. cvi., replies 
[<f. postea, p. 613]. Signoret, 1. c. p. cciii., adheres to his opinion ; as 
does Lichtenstein to his, L c. p. cciv. 
