374 



ARACHNOIDEA, 



CASE specimens sent to us to know what insect has done the mischief 

 ^^^^ We have therefore appended two or three examples of these at the 

 termination of the mite galls, and it may be advisable at some 

 future time to display a larger collection of them. In the mean- 

 time,, the following will serve to put the student on his guard. 



No. i6. Erineum tili^. — 16. specimen on leaf ofelime tree. 



A small woolly patch in the corners between the ribs on the 

 underside of the leaf of the lime tree. It is somewhat like the 

 work of Phylloxera vastatrix on the underside of the vine leaf. It 

 does not appear, however, to be the work of an insect; nor is it 

 a fungus, but is merely an instance of hypertrophy, or overgrowth 

 on the leaf. 



17. i8. 



^^°f^ ^CIDIUM ABiETiNUM.— 17. Specimen of leaf .• of • Abies Ceplialonica, bearing; 

 open cells of ^cidium on its underside ; 18. Magnified sketch of ditto. 



This is a fungoid growth, which occasionally occurs on the 

 leaves of fir trees. 



Nos. RoESTELiA LACERATA.— 19. Hawthom leaf, with cells of Roestelia lacerat:^ 

 upon it ; 20. Magnified sketch of ditto. 



This is another fungoid growth, and looks like a congregation 

 of the cells of a Zoophyte. It is confined to the hawthorn, and ir> 

 not uncommon on its leaves. 



Nos. RcESTELiA CANGELLATA.— 21. Specimens of pear leaves, showing first stage 

 of growth Off this fungus, making the leaves look beautifully mottled 

 with orange , 22. Sketch of ditto ; 23. Leaves of ditto, showing second 

 stage of growth, as seen on the upper side ; 24. Ditto on showing ditta 

 from the underside. 



The illustrations in the case show the diff"erent appearance of 

 the pear leaves at the different stages of growth of this fungus. It 

 is said to be another form of Podisoma sabinse, which is found in 

 orange-coloured jelly-like masses on Juniperus sabina. 



21 — 2\. 



