88 TiiK APTiii)i:s or oi rciixsEV. 



Myzus eerasi, F'i>>. AbinicLmt on cherry trees in p^ardens. Tn some eases 



I have seen the stems of tlie cherries (jnitc bhick 's^^th them as they 



ehistered toilet lier . 

 DpepanOSiphum platanoides, f^chr Connnon on the under sides of the 



leaves of the syc iniore and maple. 

 RhopalOSiphum ribis, Luiv. Common in :May and June on the black- 

 currant and ^-ooseberry. 

 R. dianthi, Schraid-.. Common in greenhouses, also on all kinds of culti- 

 vated plants in gardens. It is very destructive. 

 Aphis brassicse, LhDi. Common on tlie garden cabbage, it feeds also 



on a variety of other j^lants. 

 A. mali, Fab. Common on the under sides of the leaves of apple trees in 



gardens. June and July. 

 A. ppuni, Rmiimur. Common on plum trees. 



A. euonymi, Fahr. On Ftiojii/zuns FJuropa'/(f> hi hed'^e^^. July and August. 

 A. lyehnidis, Li/o/. Common from June to August on the stems and 



flowers of the red campion, Li/chnis diuiiia. 

 A. hederse, AT/Z^ Numerous on shoots of ivj in June. 

 A. jaeobsese. Common on the ragwort in June and July. 

 A. rumieis, Linn. This is a well-known species, common on the stalks of 



the broad bean where they are very destructive. They feed also on the 



turnip plant. In 1854 they ravaged the turnip fields of Yorkshire, many 



hundreds of acres being utterly ruined. 

 A. atriplieis, Linn. Specimens were found on white goosefoot (67/ <';/o^;or/i^^;^/ 



albniii) at Fermain Bay in July by Mr. E. D. Marquand. 

 A. eaPdui, Linn. Feeds on the thistle, Cardnus lanceolatus. Common at 



Fermain Bay in July, E. D. Marquand. 

 Chaitophorus aeeris, lAnn. Common on the leaves of sycamore and 



maple. The dimorphous form of this insect, previously described, 



is common in Guernsey. 

 Cladobius populeus, Eoch. Abundant on twigs of poplar in a garden. 



Burnt Lane. Not British but common on the continent. 

 Callipterus quereus, AV//^ Common on the under sides of oak leaves, 



June, July and August. 

 PhyllaphiS fagi, Linn. Common on the undersides of the leaves of the 



beech, in Queen's lload, Upland Eoad, and Vauv(>rt. They cover 



themselves with a white fluffy material. 



SCHIZONEURIN^. 



Sehizoneura lanigera, Huusman. The iwpular name of this pest is 

 " American Blight." It is supi)osed to have been first seen in England 

 in 1787. Sir Joseph Banks traced its origm to a nursery near London, 

 whose owner it appears had recently received a consignment of apple trees 

 from the New World. It feeds on the sai^ of the apple tree, and lives in 

 dense companies, producing warty or si:>ongy swellings on the stems. In 

 the spring and summer the white cottony masses of these Aphides are 

 very conspicuous in many orchards and gardens in Guernsey These 

 pests will bear intense cold with impunity whilst covered with their 

 cottony tufts. 



S. ulmi, Linn. Not uncommon on elm trees, where they cause the leaves to 

 roll up. I noticed the elms opposite the Town Arsenal much infested 

 with these ApJHdes this summer. 



PEMPHIGINiE. 



Pemphigus laetueaPius, Pass. I have found this species at the decaying 

 roots of the garden lettuce in February. They also occur at the roots of 

 the wallflower and goosefoot. 



