70 



This analysis showed that the sample on treatment with sulphuric 

 acid ^delded 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- 

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

 left in the mixture by a faulty 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 

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

 tc» 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 Fdk. Maskew, Long Beach, Cal. 



The following notes are compiled from observations on Fuller's 

 rose beetle (Aramigus fulleri Horn) made by the writer during the 

 season of 1904 in Los Angeles County, Cal. 



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

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

 surrounding soil. The greatest depth at which larva? were found in 

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

 berry and logan berry thc}^ were found attacking the roots at a 

 depth of from 15 to IS 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 which the pupa was found, since it came up in a 

 trowel full of loose soil. 



June 17 the first beetle was noticed. It was feeding on the foliage 

 of an ornamental shrub, Lagunaria pattersonii. During this month 

 beetles became numerous. 



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

 matter with a large potted ornamental asparagus (Asparagus plu- 

 onosiis nanus). The plant presented a very sickly appearance, the 

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

 dence of scale insects or mealy bugs, the roots were investigated, with 

 the result that 84 larvi^e and pupae of Fuller's rose beetle were 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 19 a beetle Avas observed in the act of ovipositing. The 

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

 face of the foliage of a crested wattle {Alhizzia loj^hantha) ^ a potted 



