THE ENTOMOLOGIST. 



75 



Fi-. 7. 



June, second year ; (4) Ceioptiis Cerri of Mayr — it appears 

 from April to June, second year. — Francis Walker. 



Dryocosmus cerri philus. — This 

 rare gall is also found on the young 

 twigs of the Turkish oak (Quercus 

 Cerris). The galls are about the 

 size of a hempseed, and are attached 

 to one spot in the twig, quite sur- 

 rounding it, and more or less densely 

 crowded. Each gall, by means of a 

 short pedicle, is inserted in the bark 

 of the twig, which, in consequence, 

 is thickened : sometimes the pedicle 

 becomes gradually lengthened, and 

 the gall terminates in a spherical 

 head, thus assuming a clavate form ; 

 the interior is occupied by a rather 

 large larva-cell. As I have never 

 seen the gall in a recent state, but 

 only on a two-year-old twig, in 

 company with similar old galls on 

 an oak that was about eighty years 

 of age, I should recommend the 

 reader to seek farther information 



from Dr. Giraud's ' Signalemenls, &c., Ver. zool. bot. Ges. 

 1859,' p. 354.— G^. L. Mayr. 



Dryocosmus cerriphilus has one inquiline, Synergus varia- 

 bilis of JNlayr; it appears from April to June of the second 

 year. — Francis Walker. 



Dryocosmus ceeeiphilus. 



Geographical Distribution of Continental Rliopalocera, 

 By the Rev. F. A. Walker, M.A., F.L.S. 



In compiling the following catalogue it must be understood 

 that 1 have only set down such species as fell under my own 

 personal observation. The statistics accordingly of each 

 locality, though greatly defective, may be relied on as far as 

 they go. 



Bellayio and its environs. — 1. Papilio Machaon : gardens 

 of Hotel Grande Bretagne, Villa Serbelloni, Villa Julia, 



