Ivsecl'<, etc., Tniurions In ihe Damf<on. 



>51 



partly fioiu the pvoducu oF the luio-rauts from tin; hops a,ii(l rarely 

 from the hops themsehes — the winded males appearing som(i ten 

 days hitcr than the winged female migrants. These males fertilise 

 the iiviparoiLs wingless fentales, and may be i'ound in nnndjers 

 /// i-ninili't on the prunes. In aliout two days after copulation the 

 females deposit one or more greenish eggs, which sodu become black. 

 They i.'ommence dvipositiiig in Octoljer in small ntnnl)ers ; great 

 numbers rif eggs have lieen observed by the -12nd, oviposition 

 ceasing i.m tlie 8th of Nnvember. Here tlie eggs remain all the 

 ^\■inter, starting ifesh in the spring, as previously narrated. 



rjniviiilnn Immiili can, liowex'er, carry on its existence in another 

 way. < )n two occasions apliides lla^'e lieeu found on the Imp-shoots 

 early in tlie year (April). l)itriite' the winters (if '00, '98, and '09, 1 

 freipteiitl\^ searched for liniiiuli in 

 the Imp-hills and nn Ijroh'en liine, 

 both as eggs and aphides. In ISOS, 

 in February, I found two wingless 

 vi\iparous females in the, hills. It 

 appears, therefore, that continuity 

 may be carried on during the winter 

 in that way as well as in tlie egi;- 

 stage on prtmes. Several observi.'rs 

 have tohl me that they notice lice 

 on the hops early in the year, and 

 probalily tliese have wintered in the 

 hills, and commence to give rise to 

 y(juug as soon as the weather Ije- 

 comes favourable. In experinmnts 

 C(.inducted at Stoke Edith in 1884, 



it was founil that \\-here tlie hills were dresst'd no early lice appeared, 

 hut thi> rest of the garden was infested. 



It is thus pretty clear that this aphis li\-es in two ways duriug 

 the Avinter — upon tlie prunes in t]u= egg stage, and a iew in the hop- 

 hills and other shelter, and thus li\ing entirely upon the jiop ; 

 damage being done to both host plants. 



((iitattv eiilai'-ril.) 



DESCIIimuN OF TIIK Al'HlS. 



{]) Aiitiroiis Tirijjiniiiis Fituii.lr. (On prunes, ovid in form: 

 liright to vellowish-greeu, with a central dorsal deep green line, and 

 a deep green jagged lateral stri[)e on each side. The frontal tuljereles 

 distinct. Eyes, reddish. Legs and antenna-, apple green. Length 



