INSECTS 



,m n r Ph ' S f Un ? - n Hme treeS is P/ ^ tf// " "'&"> which is at times unpleasantly 



mimon. The frequent white silky or cottony mass under the leaves of the common beech is the 

 cretion formed by a colony of Phyllapbh fagl. Lachnus cuprem was described by Buckton from 

 specimens forwarded though McLachlan by the Hon. J. T. Boscawen from Lamorran, where they 

 were doing considerable injury to the cypresses in 1879. L. agllh and L. plnl have been taken 

 sparingly near Truro on Scotch pine, and L. plnlcolm on the same tree at North Hill. Aphides 

 .ve been obtained several times in the nests of ants at Bishop's Wood, but by an accident the only 

 species identified are Trana troglodytes and Forda formicaria. 



The American blight, Scbizoneura lanigera, is unfortunately ubiquitous, and the damage it does 

 is too well known to require description. For several years the old elms in TrceoU's Road, Truro 

 have been infested by the leaf-blistering S. u/mi and the gall-producing S. lanuglnosa. The former 

 is the cause of the beautiful 'silver rain' that excited so much attention there in the summer 

 or 1901. 



The cotton-lined earth cavities of Pemphigus fuscifrons were common in a field of dredgecorn 

 >es.de the Gannel in 1903, and P. lactucariw is often abundant at the roots of decaying garden 

 :ttuce. Thelaxes dryopbila was very common on the oaks about Kilkhampton in April, 1900, but 

 has not been collected since. CAirma corticaR, frequently infests the twigs of the Scotch pine, and 

 : month of June the numerous white cottony tufts it forms at the base of the leaves are at 

 les very conspicuous. The false cones on the spruce are the work of C. abieth ; lately they 

 have been somewhat scarce. C. laricis, too, is fortunately less common now than it was in 1891. 

 Phylloxera punctata is abundant in some districts on the under surface of oak foliage. This and the 

 scarcer P quercus make bright yellow or orange spots right through the leaf. P. vaaatr ix is still 

 fortunately very uncommon m the county, though numerous galls have twice been found on the 

 leaves of greenhouse vines and affected roots have thrice been sent for examination. Tycbea phalli 

 was obtained in considerable numbers near Truro in 1902 on the roots of haricot, lima and scarlet- 

 runn 



runner 



ARACHNIDA 



Spiders 



The county of Cornwall ought, on account of its southern position and almost sub-tropical 

 climate, to produce a very large number of spiders and other arachnids. There has however 



er aracns. ere as owever 



been very httle serious collection done, and so far as I am aware, the Scilly Isles and norlernlhores 



aVeenenrey The P "* " *"* Up<m *" ""^ ^ at different i " 



heRevopk d , a erent tmes 



Rev. O. P.ckard-Cambridge, and on the many captures by Mr. G. C. Bignell, the well-known 



ntomologist of Stonehouse, Plymouth. The remaining species have been observed and recorded 

 f the present author during several visits to the county. Of the species (upwards of 500) recorded 

 r Great Britain and Ireland 117 only have been observed in this county/but the list might easily 

 e doubled or trebled by a little energetic research. 



Of the rarer or more interesting species one might mention Atypm affinis, which was taken 

 ; enty along the south coast in June; Micarla tcintillans ; OxyptUasancLrla ; EuopZv 



ARANEAE 



MT GAL OMORPHAE 

 ATYPIDAE 



tamftair 1 ' 11 ^ ^ *"* ^ ^^ "* ^ ?**? V ^ Th<5 rctreat COnsistS of a Ion 8 **, 



half an inch m diameter and from 7 in. to 9 in. long 



i. Atypus affinis, Eichwald. burrowed in the soil, and lined throughout with 



Polperro ; Fowey. white silk ' terminating at the lower end in a slightly 



This example of the Mygahmorphae, though belong- young are hatched " d t ^rTh " , l? 16 ^ anc ^ l ^ e 



245 



