238 Ins. 
RIIYJiCHOTA. 
[Lichtenstein, J.] R^ponse a M. Balbiani, au sujet des migrations et 
des pontes des Phylloxeras. Tom. cit. pp. 846-848. 
Reiterates the migration theory. 
Riley, C. V. Notes on the Natural History of the Grape Phylloxera. 
Tr. Ac. St. Louis, iii. pp. 281-287, fig. 22. 
The following conclusions are deduced : — There is no practical use in 
knowing the nidus chosen by the female ; downy or tomentose leaves are 
apparently chosen in preference ; the impregnated egg of F. vastatrix will 
by inference hatch in the season in which it is laid ; there is no “ winter 
egg as in P. quercus, except possibly in some exceptional cases ; and the 
term “ pupa ” applied by Lichtenstein to sexed eggs is unwarranted. 
The entire metamorphoses can, under certain circumstances, take place 
underground, without the intervention of the perfect winged form ; a 
winter egg ready to hatch found on the root in May ; the identity of 
the adult gall-living female with that found in the root-swellings cor- 
roborated ; the gall-living form produces the root-livers with wide, 
bevelled antennae. V. Fatio, Arch. Sci. Nat. (2) Ivi. pp. 163-166 (extr. 
from 2nd Rep. to Dept, of Interior, Canton Geneva) ; also C. R. Ixxxii. 
pp. 1378-1380, andlxxxiii. p. 41. 
Observations on the extraordinary spreading of Phylloxera in Bur- 
gundy in 1876 ; J. Lichtenstein & II. Millot, Messager du Midi, 
No. 219, Aug. 11th, 1876. A small red IVomhidium observed to attack it. 
On the isolated district of Mancey (Sa6ne-et-Loire) affected by Phyl- 
loxera : A. Rommier, C. R. Ixxxiii. pp. 386-388 ; also J. Lichtenstein, 
Bull. Soc. Ent. Fr. (5) vi. p. clx. 
Report on experiences in S. France ; Marion, C. R. Ixxxiii. p. 38. 
At Orleans ; M. Girard, Pet. Nouv. ii. p. 82. Cf. also Signoret, Bull. 
Soc. Ent. Fr. (5) vi. p. liii. 
On its presence and origin at Orleans ; Mouillefert, C. R. Ixxxiii. 
pp. 728-735, with map. These observations are entirely opposed to Lich- 
tenstein’s ideas as to migration of species. 
On its progress in the departments of the two Charentes ; Bouillaud, 
tom. cit. pp. 873-875. 
On its advance to Hungary ; E. de Kvassey, tom. cit. p. 1282. 
It did comparatively little injury in N. America in 1875 ; insecticides 
applied to the roots during May and J une, in the interval between the 
hatching of the impregnated winter egg and the appearance of the winged 
females, are, most likely to be of use. It certainly occurs in California. 
C. V. Riley, Rep. Ins. Mo. viii. pp. 157-168. 
Destructive agents. Mouillefert, p. 317 ; Allies, pp. 612, 1044, 1380 ; 
Crolas & F. Jobart, p. 615; Demaille, p. 617; De la Vergne, p. 725 ; 
Marion, p. 1381 ; Delachanal, p. 1428 (C. R. Ixxxii.). Mervoyer, p. 92; 
Rosseau, p. 134 ; P. Mouillefert, pp. 209-214, 959-961, 1224-1227 (sulpho- 
carbonate of barium strongly recommended) ; Dumas, p. 328 ; Mares, 
pp. 427 & 1142 ; Gueyraud, p. 432 ; J. Roussellier, pp. 434 & 1219 ; 
Sabatd, p. 437 ; Allibert, p. 479 ; T. PignMe, p. 601 ; Gachez, p. 632 ; 
Allies, pp. 702 & 1222 ; Boutin, p. 788 ; E. Blanchard, p. 843 ; Dela- 
