564 



Froggatt (W. W). a Descriptive Catalogue of the Scale-insects 

 (« Coccidae ") of Australia. Part U.—Dcpt. Agric. N.S.W., 



Sydney, Sci. Bull. 18, June 1921, 159 pp., Ill figs. 



The new species described in this catalogue are : — Lecaniinae : 

 Ceronema caudata on Eucalyptus rohiista ; Pulvinaria contexta on 

 Bossiaea sp. and Dillwynia juniperina ; P. darwiniensis , on Caladiimi ; 

 P. greeni on Myoporum deserti ; P. newmani on Jacksonia ; 

 P. salicorniae on Salicornia ; P. theae on Thea viridis ; Tedopul- 

 vinaria loranthi on a Loranthus parasitic on Eucalyptus ; Ctenochiton 

 serrata and C. transparens on ^cacm ; Lecanium cappari on 

 Capparis mitcheUi \ and L. synapheae on Synaphea petiolaris. Dagty- 

 LOPiiNAE : Lecaniodiaspis convexus on . Eucalyptus ; L. dilatata on 

 Acacia discolor ; L. frenchi on Eucalyptus ; L. microcibraria on 

 Epacris impressa ; L. newmani on Eucalyptus ; Cerococcus auranticus 

 on Busaria spinosa ; C. pyriformis on an undetermined shrub ; 

 Rhizococcus bicolor on ylcacm ; Gossyparia syncarpiae on Syncarpia 

 laurifolia ; Eriococcus angulatus on Araucaria excelsa ; £. busariae 

 on Busaria spinosa ; £. f^o/// on Eucalyptus piperita ; £. gregarius 

 on Eucalyptus ; £". irregularis on Eucalyptus piperita ; £. ^i'c/a 

 on Eucalyptus ; £". tessellatus on Eucalyptus ; £. villosa on Busaria 

 spinosa ; Eriuni frenellae on Frenella robusta ; E. newmani on Grevillea ; 

 Dactylopius candidus on ^cac/a decurrens ; D. hilli on ^cacza ; 

 and Pseudococcus stolatus on Myoporum deserti. Brachyscelinae : 

 Apiomorpha frenchi and ^ . globosa on Eucalyptus rostrata ; and 

 .^4. /?i/// on £. miniata. 



Allen (W. J.). Fumigation versus Spraying for Scale-insects. — ^g'nc. 

 Ga2:. iV.S.I'f ., 5>'(^Mey, xxxii, pt. 8, August 1921, p. 542. 



Experience shows that even the best sprays are inconsistent in 

 their effect when applied against scale-insects, whereas fumigation 

 is most reliable if properly carried out. 



Allen (W. J.). Combined Sprays. — /Ig'^-a^'c. Gaz. A^.S.I^., Sydney, 

 xxxii, pt. 8, August 1921, p. 559. 



In making combined sprays it is essential that the quantities are 

 correct. To make a spray of 100 gals, of lead arsenate and nicotine 

 solution at the rate of 1 lb. of arsenate to 25 gals, of water and con- 

 centrated nicotine solution 1 pt. to 100 gals, of water, the best way is 

 to mix the 4 lb. of lead arsenate in 95 gals, of water, to which the pint 

 of nicotine concentrate, mixed with 4 gals., 7pts. of water, should be 

 added. 



NiCHOLLS (H. M.). The Chemistry of Spray Mixtures. — Tasmania 

 Dept. Agric, Hobart, Bull 97, 1920, 7 pp. [Received 30th 

 September 1921.] 



A simple explanation is given of the chemical reactions that take 

 place in the making of the principal sprays and the chemical 

 characters of the materials used. The sprays dealt with are lime- 

 sulphur solution, Bordeaux mixture. Burgundy mixture, iron-sulphide 

 sprays, nicotine, arsenical sprays and combined sprays. 



