CHERMES LARICIS. 33 



above quoted, that the excrescence develops itself solely 

 by the punctation or boring into the swelling bud by 

 the mother Aphis, long before the eggs she lays are 

 hatched. After this has taken place the mother louse 

 "dies of infirmity," but in the meantime the little 

 insects slip out of the eggs, and immediately betake 

 themselves to the juicy galls which have been caused 

 by the mother. They crawl into the corners of the 

 closely compressed and scale-formed needles, and try 

 to penetrate between them.* 



Miss Ormerod, in her useful ' Manual of Injurious 

 Insects,' gives much the same account, and would 

 seem to have witnessed the entry of these young 

 Chermes into the chambers from without. She says 

 the larvae spread themselves along the lines which 

 divide the galls, " apparently . . . disappearing 

 into the chambers within." f 



Through the kindness of friends I have received 

 pseudo-cones from Norwich, Bishopstoke, Isleworth, 

 Bramshot, Arlesford, and other places. 



I believe that Chermes viridis, Ratz., is only a 

 variety of C. abietis. 



Chermes laricis, Hartig. Plate CXIX, figs. 3 — 9 ; 

 Plate CXX, figs. 1—4. 



Eriosoma laricis, Sir Oswald Mosley. 

 Chermes laricis, Kalt., Ratz., Koch. 



„ geniculatus, Ratz. 

 Anisophleba hamadryas, Koch (?). 

 Adelges laricis, Vallot. 



Queen Aphis. 



Inch. Millimetres. 



Size of body 0-070 xO'045 l'77xl'14 



Length of antennae - 015 0*38 



* Kaltenbach, ' Monographic der Pflanzenlau.se,' p. 202. 

 t E. A. Ormerod, ' Manual,' p. 242. 

 VOL. IV. 3 



