REPORT OF THE STATE ENTOMOLOGIST I9IO 49 



that this pest has been received from Cornwall-on-Hudson, Pough- 

 keepsie, Hudson, Castleton, Ballston Spa, Cobleskill and Brighton 

 near Rochester. Young were appearing in considerable numbers 

 on the material received from Hudson in early June and the same 

 was true of specimens from Cobleskill collected October i8th. This 

 species begins to breed in New York State the latter part of May 

 or in June and apparently produces young in greater or less numbers 

 throughout the season, though Professor Smith believes that there 

 are not more than three generations in New Jersey. Material col- 

 lected in New York State showed the presence of several parasites, 

 Arrhenophagus chionaspidis Aur., while Professor 

 Toumy has reported the rearing ofAphelinus diaspidis 

 How. from this species. 



This pest, as was observed by Professor Smith, is very likely to 

 be abundant in sheltered, shady situations, especially beside build- 

 ings. It can be controlled best by thorough spraying in the spring 

 at the time the reddish young appear, with a whale oil soap solu- 

 tion, using about one pound to six or seven gallons of water and 

 repeating the applications at intervals of a week or ten days, so 

 long as the abundance of the pest appears to justify the treatment. 

 A kerosene emulsion, the standard formula diluted with at least 

 nine parts of water, should be equally effective. 



Greenhouse leaf-tyer (Phlyctaenia rubigalis Guen. ) . 

 The pale green, rather slender, black spotted caterpillars of this 

 species were brought to our attention in October by John Dunbar, 

 Assistant Superintendent of Parks, Rochester, N. Y. because of 

 their feeding upon the underside of chrysanthemum leaves. He 

 found that they also attacked geraniums and some other plants. Mr 

 Dunbar attempted to control the species with applications of helle- 

 bore, nicotine and even by fumigation, using one ounce of cyanide of 

 potassium to 5000 cubic feet of space without apparent results, 

 though this last named treatment is an effective check upon the 

 white fly. 



This insect has been known in entomological literature by sev- 

 eral names. It was first described by Guenee in 1854 as S c o p u 1 a 

 rubigalis, while other authors published descriptions of this 

 form under the names of Botys oblunalis Led. and B o t i s 

 harveyana Grote. This species has been assigned to other 

 genera such as Margaritia, Pyrausta and Pionia. It has been fre- 

 quently discussed under the name of Phlyctaenia ferru- 

 g a li s Hubn., a nearly cosmopolitan, world-wide form distinct, 



