54 



Various methods for destroying scale insects, D. ^y. Coquillcit (pp. 19- 

 36). — Accounts of experiments witli liydrocyanic acid gas for the red 

 scale (Aonidia aiirantii, Maskell); with washes of resiu, caustic soda 

 and fish oil, and of lime and sulphur, singly or together, or combined 

 ■with salt, for the San Jose scale {Aspidiotus perniciosiis, Comstock) ; aud 

 with corrosive sublimate, glue, or aloes for different species of scales. 

 The simplified tents used iu the hydrocyanic acid gas treatment are 

 described. It has been found that orange trees are less liable to 

 injury by the gas when treated at night. The resin wash was found to 

 be a very ellec^tive as well as inexpensive remedy for the San Josi- scale. 

 Glue gave good results, but is comparatively costly. 



Experiments icith resin compounds on Phylloxera, and [/(ncral 7Wtcs on 

 California insects, A. Koehele (pp. 37-44).— Experiments witli various 

 resin washes for the Phylloxera in Sonoma Valley, California, are 

 reported. The most satisfactory formula is caustic soda (77 per cent) 5 

 ])ounds, resin 40 pounds, and water to make 50 gallons: 



First the soda sboiild be dissolved over fire with 4 gallons of water, then the resin 

 added aud dissolved properly, after which the re<|nired water can he jjiven slowly 

 while ItoiJinir to make tli<^ r>0 gallons of rotiipoiiud. This will make .'>00 gallons of the 

 diluent, Hnllitiont for liM) jdants, and costing about H4 cents. 



Observations are also reported on several species of the genus Clisio- 

 campa, a noctuid larva (Tirniocampa) which injures fruit trees, Calopte- 

 nvs devastator, i\u{\ Camnula pdlncida. 



Entomological notes ftr the .sw.s-o/j o/ 1S90, ^t. E. Murtfcldt (pp. 45- 

 5G).— Notes are given on the prevalence in Missouri of chinch bugs, 

 cankerwonns, cutworuis, Gortyna nitela, Ueliothis armii/era, Phyllotreta 

 vittata, P. sinuata, Chatocnema puliraria, C<>notrach<lus nenuphar, \)h\ut 

 lice, Parasa chloris, Enclea querceti, Emprctia stimnlea, PhoUetron pithe- 

 cium, IJmarodcs scapha, Lagoa crispata, Saturina io, Itatana anguaii, 1). 

 ministra, Orgyia Icucostigma, hhthyura inclnsa, anil Jlyphantria cnnea. A 

 carabid beetle (/V(>c/</o«m.s timidus) wasobserved to prey extensively on 

 the fall webworm [Hyphantria cunea). Four new enemies of the apple 

 are described, Penthina chionosema, Proteopteryx sjyoliana, Steganoj)- 

 tycha pyricolana, aud (tclechia intermediella (?). 



Under the head of experiments with insecticides are given accounts 

 of experiments with X. O. dust, buhach, arsenites of ammonia, and 

 petrolenm sliulge. It was found that dry X. (). dust blown from a bel- 

 lows during tlie middle of tlie day is a thoroughly satisfactory remedy 

 for plant lice of all kinds. The arsenites of ammonia, when used 

 according to the manufacturer's directions, one tablespoonful to a gallon 

 of water, proved to be an eHieient insecticide, but badly scorched the 

 leaves of peach and cherry and slightly damaged the folinge of plum, 

 apple, rose, and squash. The petroleum sludge arrived too late for 

 satisfactory trial, but Miss IMurtfeldt thinks that its intolerable and 

 persistent odor is a serious obstacle to its general use, especially in 

 small gardens. 



