42 fJu'y. 



Among the species Foerster received from England, was Psi/ila almi, Linn., of 

 wliicli Linne, in the " Fauna Sueclea," p. 262, sajs that it lires in the convohited leaves 

 of the sniall-lcared elm (Ulmus eampestrisj, in company with Aphides. I have not 

 found tliis species, but I do not believe it will be difficult to get. 



The following species have not yet been found in Britain, but, their food-plants 

 being common here, there is no reason why they should not enjoy, or endure, the 

 hospitality of these islands. 



Psylla (Chermes) cerasfii is said by Linne (F. S., p. 262) to live on Cerastium 

 viscosuni, causing the terminal leaves to curve into monstrous ventricose forms. 

 Dr. H. Loew, in the "Stettiner ent. Zeitung," viii, 344 (1847), described a Psylla 

 cerasfii as a new species, without referring to that of Linne of the same name ; yet, 

 although the fond-pla'its are not the same, they are so nearly allied, and the appear- 

 ances produced thereon are so similar, that the insects are probably the same species. 

 Dr. Loew found his species at the end of June on Cerastium vulgatum. He says the 

 deformation always exists at the end of a stalk, and consists in a shortening and 

 thickening of the stem, and a diseased growth of the flower-portion : the calyx 

 assumes a cap-like form, and is sometimes elongated nearly an inch ; the flower-petals 

 become foliacoous and green, are enlarged more or less, sometimes as much as four 

 times their natui-al length, and take the most varied and irregular forms ; the capsule 

 swells into a bladder-shape, with an uneven surface, attains to three or four times 

 its natural length, and the seeds within it shrivel. This remarkable malformation 

 is caused by the broad, flat larvse and pupse of a Psylla which reside, either singly 

 or several together, in the axils of the flower-buds, covered with white, flocky wool, 

 which, however, does not adhere to their bodies. Then follows a minute description 

 of the larva, pupa, and imago ; and figures are given of the pupa and an upper-wing 

 of the perfect insect. 



Psylla ixophila, Frauenf., is said by Kaltenbach fop. cit., p. 293) to have been 

 found by him, in the pupa-state, at the end of April, and the adult insect was recog- 

 nised as a species distinct from P. visci. This is worth investigation. 



Trioza flavipennis, Foerst., was found near Pressbaum, in June, 1872, by Dr. 

 Franz Low (Verb. z.-b. Ges. Wien, xxiii, 141), on Hieracinm pi/o.<tella, and lie de- 

 scribes and figures the pupa. In July, 1869. he had found what ho considers to be the 

 same species on Lactuea muralis (a plant of the same natural order as llieracium. 

 growing on old walls and dry banks). 



In different foreign publications, are notices of tlie habitats of other Psyllidce, 

 but the foregoing examples may suflice at present as incentives to work in a field in 

 which a rich harvest is to be gathered. — J. W. Dot'GL.\s, Lee* ^th June, 1876. 



Postscript. — Ehinocola aceris, L. 1 his, hitherto one of our scarcest species 

 of Psyllida;, I found last evening in profusion on a maple {Acer campestre) growing 

 in an exposed situation by the sallow-pit at Lee. I had previously thrashed many 

 maples growing in sheltered places without getting the insect. Linne originally 

 found the species on Acer platanoides (not British) ; but Foerster took it at Aachen 

 on the maple. — Ip. : \^th June. 



A plague of spiders (Lycosa savcaiaj. — One sunny day towards the end of 

 March, strolling through Onchan Bay, near Douglas, a singularly-marked stone — 



