70 



This analysis showed that the sample on treatment Avith sulphuric 

 acid yielded only 54.50 per cent of the amount of hydrocyanic acid 

 demanded by theory for pure potassium cyanide. An examination of 

 the residue from the sample after treatment with sulphuric acid was 

 also made, and it was found that the blue color of this residue ap- 

 l)eared to be due to Prussian blue (ferric ferrocyanide), a compound 

 left in the mixture by a fault}' method of manufacture. 



Mr. Haywood also made an examination of two samples of flour 

 which had been treated with hydrocyanic-acid gas October 11 for 

 Triholium confusum^ with the result that no traces of the acid were 

 to be found in either sample, showing that the flour is not affected 

 in any way by this method of fumigation. 



NOTES ON FULLER'S ROSE BEETLE IN 1904. 



By FuK. Maskew, Long Beach, Cal. 



The following notes are compiled from observations on Fuller's 

 rose beetle {Aramigusftdhri. Horn) made by the writer during the 

 season of 1004 in Los Angeles County, Cal. 



Throughout the month of May larvte of all sizes were abundant in 

 the infested berry fields, both in the strawberry plants and in Ihe 

 surrounding soil. The greatest depth at which larvee Avere found in 

 the strawberry fields approximated 5 inches. In the case of black- 

 berry and logan berry they Avere found attacking the roots at a 

 depth of from 15 to 18 inches. 



May 23, in the soil surrounding a strawberry plant, the first pupa 

 was found. This plant, while wilted, was still green, and contained 

 no grubs in the borings in the stem. The writer was unable to esti- 

 mate the depth at Avhich the pupa was found, since it came up in a 

 trowel full of loose soil. 



June IT the first l^eetle was noticed. It was feeding on the foliage 

 of an ornamental shrub, Lagnnaria fattersonii. During this month 

 beetles became numerous. 



July 29 the writer was asked by a local nurseryman what Avas the 

 matter Avith a large potted ornamental asparagus {Asparagus j>1u- 

 mosus nanvs). The plant presented a A^ery sickly appearance, the 

 .stems being hard and dry, and the foliage yelloAv. Finding no evi- 

 dence of scale insects or mealy bugs, the roots Avere investigated, Avith 

 the result that 84 larvte and pupte of Fuller's rose beetle Avere found 

 in the soil and upon the roots contained in the 10-inch pot. The pot 

 and plant had been suspended from the rafter of a lath house and 

 had not been disturbed for eleven months. 



August 10 a beetle Avas observed in the act of ovipositing. The 

 eggs, 26 in number, Avere laid in an irregular mass upon the upper sur- 

 face of the foliage of a crested Avattle {Alhizzki lophanfha), a potted 



