(D.) 



ADDENDA, 



Inceeased Production of Pyretiirum Insect-powder; page 

 37. — That the promise of Mr. Milco of a great reduction in price of 

 the ''Bnhach " is about to be fulfilled, nia}^ be inferred from the fol- 

 lowing statement recently made: 



Mr. G N. Milco, superintendent of tlie Buliacli Producing and Manufacturing 

 Co., Stockton, Cala., estimates this year's Pyretbrum crop of the company's /ari^i 

 in Mercer county, to be at least forty tons. {Amej'iean Naturalist, June, 1883, 

 xvii, p. 666.) 



Paraffine as an Insecticide ; page 4G. — An English horticultur- 

 ist gives the following directions for the use of paraffine, which he says 

 he finds the best of all insecticides for the greenhouse: "I mix it 

 thus: to half a pound of soft-soap, I add one pint of hot water, stir 

 until the soap is thoroughly dissolved, then add half a pint of par- 

 aflBne and stir weW ; to this I add two quarts more of hot water, and 

 put the whole into a stone bottle and shake it well before using. 

 This I always have in readiness, and for syringing or sponging we di- 

 lute it as may be necessary. It mixes readily with cold water, and 

 thus mixed may be safely applied to any plant.'' 



Lucilia sp. ; page 62, foot-note. — The parent of the " screw-worm " 

 long known as a serious pest to horses and cattle in Central America, 

 has recently been ascertained to be Lucilia {Campsomyia) marcellaria^ 

 Fabr. For an interesting account of its attack upon man — in several 

 instances proving fatal — see a paper by Prof. F. H. Snow, in Psyche, 

 1883, iv, pp. 27-30. 



Eemedy for the Cockroach ; page 65. — Powdered borax has 

 inadvertently been given as a repeUanf of the cockroach and the cro- 

 ton-bug. It should have been included among the remedies, as it is 

 perhaps the most simple and effectual means for killing them that can 

 be employed. In a house badly infested with them, a pound of the 

 powder was strewn over the floors of two basement rooms, and along the 

 wainscoting of others. When the house was opened after having been 

 closed for a fortnight, thousands of the dead bodies of the two species 

 were scattered over the floors, and a few were still giving evidence of 

 life. What seemed dust upon a portion of a pantry, was found to be 



