THE AMERICAN ENTOMOLOGIST. 



99 



look Out for the Eggs of the Apple-tree Plant-louse. 



^Vhile at Columbia, Mo., at the meetiug of 

 the State Horticultiual Society, wc noticed that 

 the little, .shiny, black bead-like eggs of the 

 common Apple tree plant-louse (Ajihis mali, 

 Fabr.) were very numerous on almost all the 

 trees in the neighborhood. In many of the 

 50uug trees on Mr. James Stephens's place, there 

 was not a twig which was not studded with 

 them in every crevice and crack, and around 

 every bud. At the December meeting of the 

 Alton Horticultural Society, twigs covered in a 

 similar manner were presented for identifica- 

 tion. The punctures made by the Periodical 

 Cicada form a good shelter for these eggs, and 

 are generally lined with them. "We judge there- 

 fore that this plant-louse will be more common 

 tlitm usual in these localities next .spring, though 

 wo are glad to state that the few warm days 

 wlijch occurred during the latter part of Novem- 

 ber caused about one-third of the eggs to hatch ; 

 and that those lice have since been killed by the 

 frost. Still we advise every one owning an ap- 

 ple tree to look out for them next spring, about 

 the time the buds begin to burst, and syringe 

 them with a weak solution of lye, or a still 

 weaker solution of cresylic acid soap. 



A Substitute for the Poisonous Substauces some- 

 times used for Preserving Insetts. 



The learned French chemist, T. Kaspail, in 

 his Manuel de la sante, gives a solution of 

 aloes and black pepper, as a good substitute for 

 the compounds of arseuic, mercury, etc., which 

 are made use of to presei-ve insects. He says 

 that if a small quantity of this solution be put 

 into the paste used in lining boxes, it will form 

 a sufficient and lasting protection agaiust insect 

 marauders. The plan is simple, and I strongly 

 urge its trial by Entomologists. 



Ciis. Dadant. 



Hamilton-, Ills. 



Greenhouse Plants. 



The Moally-bug and the Kcd Spider, as we 

 hear from the best authority, will stand any 

 amount of tobacco smoke, while Plant-lice 

 (Aphis) are easily killed by tobacco smoke. 

 The Red Spider, however, may be got rid of by 

 exposing the infested plants to the rain, and the 

 Meally-bug by a wash of cresylic soap, suffi- 

 ciently diluted not to injure vegetation. 



Eruata. — On page 7i), column 2, par. 2, line 

 11), for "G. C. Rye," read '-E. C. Rye." On 

 page 73, column 1, line 7 from bottom, for 

 ■■former," read ••latter." 



ANSWERS TO CORRESPONDENTS. 



How to hatcli Vupx— Daniel Porier Smith, IIa,l- 

 ilain Xeck, Cun-n. — You siiy you have collected ii quan- 

 tity of pupa% and enquire "how von can most i 



fully I ■ • " 



to keep them as near as possible i 

 in which thcv are found in natin-r 

 the winter in tlie ..-round slinuld 1 



is l<c 



state vvheu you dig the box up in the sj^rin^'. All but- 

 terfly chrysiilids that transform above ground are easily 

 bred by keeping them in a room of a low, even, ancl 

 sufficiently moist teinperatui-i> , "We have ox<-i-Ilcnt sue- 



keepin;? i 

 both it ai 

 for all in- 



\\\h- 



I ■ '.. liile thepupa'of bee- 



! u wood , or in what- 



I. The tltree chrys- 



; - i'' as follows: No.'l, 



ilul on the wild cherry, is the 



.1 moth (Attaoua Fromethea. 



i- of the great Yellow Swallo w- 



i,i,s. Linn), and No. 'A is the 



ty --^ .-lirv-nlis. nf the White- 



thereforc can not tell to « 

 belons, until we breed tj] 



leave the hull entire, a 

 brown weevil. Amongst 

 many of the perfect wec\ i 



apple tree, they iufestthe qui; ; iIp' |iliiiii. 



Theonly knownwaytodesti". ,,! -i ; !. il,. ni;,^>cs 



of crumpled leaves 'off the tr. i,, i:,, \M,,h , lim,-. ami 



cither burn them or forcibly cj iuni>le ilieui up between 

 the thumb and finger. As the larva is soft and delicate, 

 a comparatively slight pressure is sufficient to destroy 



