63 



diaspidis, How., Micropterys sp., Signiphom nigrila, A slim., Pros- 

 paltella aurantii, How., P. perniciosi, Tower, and Aphelimis fiiscipennis- 

 How. 



Preventive measures against dissemination are provided by the 

 annual inspection of nursery stock, and the prohibition of shipment of 

 such stock unless accompanied by an inspection certificate. All 

 nursery stock found infested is destroyed and all stock likely to be 

 infested at the time or liable to become infested before the end of the 

 season is fumigated with hydrocyanic acid gas before shipment. The 

 usual artificial methods of control are recommended, with particulars 

 as to the apparatus and equipment required. 



FoEBES (S. A.) & Glenn (P. A.). On the Life-History of the Codling 

 Moth. — Tiventy-ninth Report of the State Entomologist of the 

 State of Illinois, Urbana, 1916, pp. 1-21, 10 figs., 2 diagrams. 



The extraordinarily hot and dry summer of 1914 had such a stimu- 

 lating effect on the development of the codling moth {Cydia pomonella) 

 in Illinois, that the spraying measures of apple-growers were quite 

 inadequate to cope with it. A further examination of its life-history 

 shows that there are two complete generations of this moth in both 

 central and southern Illinois in a season, and a small or partial third 

 generation further south. The authors are convinced that the success- 

 ful timing of spraying operations, so that effective poisons shall be on 

 the apples when they are most needed and will be most destructive to- 

 the young caterpillars, requires careful and intelligent observation of 

 the course of events for each year, since no two years can be exactly 

 alike. They therefore advise the establishment of a properly equipped 

 observation station with an experienced man in charge for each of the 

 principal fruit sections of the State. 



Forbes (S. A.). A General Survey of the May-beetles (Phyllophaga) 

 of Illinois. — Twenty-ninth Report of the State Entomologist for the 

 State of Illinois, Urbana, 1916, pp. 23-65, 25 tables. 



This paper contains a discussion of the numbers, dates of occurrence,, 

 food-plants and distribution in Illinois of the genus Lachnosterna 

 {PhyUojihaga't^hsmed on the study of nearly 119,000 specimens collected 

 between 1905 and 1913. Thirty-four species of May-beetles are 

 recognised in Illinois, viz. : — Lachnosterna hirticula, Knoch ; L. implicita,. 

 Horn ; L. fusca, Froel. ; L. inversa, Horn ; L. futilis, Lee. ; L. forbesiy 

 Glasg. ; L. rugosa, Melsh. ; L. micans, Knoch ; L. anxia, Lee. ; L. 

 bipartita, Horn ; L.fraterna, Harr. ; L. profimda,B\ainch. ; L. tristis, F. ; 

 L. ilicis, Knoch ; L.fervida, F. ; L. vehemens, Horn ; L. cremdata, Froel. ; 

 L. corrosa, Lee. ; L. drakii, Kirb. ; L. congrua, Lee. ; L. crassissima, 

 Blanch. ; L. delafa, Horn ; L. nitida, Lee. ; L. forsteri, Burm. ; 

 L. horni, Smith ; L. jjraetermissa, Horn ; L. prunina, Lee. ; L. longi- 

 iarsa. Say ; L. arkansana, Schaef. ; L. villifrons, Lee. ; L. balia, Say ; 

 L. barda,}ioTn.; L. calceata , Horn ; L.hirtiventris, Hoin. L.f'scaand 

 L. futilis were much the most destructive m northern Illinois in 1912 



* Lacordaire pointed out long ago (Gen. Coleopt. iii, 1856, p. 284) that 

 Phiillophciga, Harris, is a nomen nudwm, and therefore should not be used. 

 —Ed. 



