1 I Si 



ARBORETUM AND FlirTlOF.TUlVI. 



PART HI. 



The larva of Saturnia Pavonia minor (bed on various species of osier. 

 1 otss N nia cruciana, a small but beautiful tortrix, lives on a dwarf mountain 

 Sulix. Lfparis (Leucdma Steph.) salieis is, in many years, very abundant on 

 different willows. Several species of the very showy genus of iVoctuidae, Ca- 

 nnula, also Feed, in the larva state, upon several species of Salix. These 

 caterpillars exhibit a very interesting instance of deceptive similarity to the 

 plants on which they feed ; their colours being of a pale greyish brown, dot- 

 ted with black, and the sides of their bodies being furnished with a membrana- 

 ceous lobe, fringed with short whitish hairs, which are applied close to the 

 surface of the t\\ i^s, so that ii is very difficult for an unpractised eye to perceive 

 them, or to distinguish them from bundles of lichens. The colours of the fore 

 wings of the perfect insects are also equally deceptive, rendering it quite as 

 difficult to perceive the moths when settled upon the trunks of the trees. The 

 hind wines of these moths are. however, very beautifully coloured, being either 

 red or pale blue, with black bands. Catoeala fraxini (the great Clifden nonpa- 

 reil) feeds, in the larva state, on poplar, ash,&c. ; C. nuptal,. upon £alix vitel- 

 lina; and C. elocata Esper (the claim of which to be considered a native species 

 is questionable) upon willows and elms. Our Jig. 1293. represents the last- 

 named species copied from Curtis's British Entomology, pi. 217.; and the 



generic details, a to t, are from C. nupta. «, b> parts of the antenna; c, spiral 

 tongue ; <l, palpus; r, palpus denuded;/, the head ; g t one of the ocelli; h> hind 

 i, claws. 



Amongst Coleoptera, the principal species which feed on the willow are, 

 Galeruca caprese, rvrochroa rubens (on the rotten wood, whilst in the larva 

 state j, Melaadma populi and tremula, Balanlnus saliclvorus, and Tachyerges 

 '- ;'i 1 i t i s ; and, amongst the Ueuuptera, A'phis salieis Z>., and Coccus caprea; and 

 ( . ;'iIk i-, /,. 



Bome parti of the [>receding article have been furnished to us by J. O. 

 Wi twood, I. (|., by whom the whole has been revised. 



The Study "J the Sprat:;. The genus .S'.dix has been a stumbling block to 

 botanists from the time of Linnaeus, who observes that so great are the 



cbangl ' ffi I ted on the finds by soil, situation, and climate, that it is difficult 



termine whether many of the differences should constitute species, or 

 ,.;•,. lb- recommends rejecting flic old names and characters, and 



. [bmg anew the several hpecies accurately, as seen in their natural places 



I oi tin . purpos* , h<- gives directions for observing the develope- 



Dient of the buds, the situation of the cat fins, the form and other circum- 



