460 



sprinkled at the rate of 300 lb. per acre — or 1 oz. per 9 square feet — 

 proved fairly effective. On the day following such treatment about 

 85% of the millipedes on the beds were dead, though under the 

 surface only about 5% were killed. Two days later none could be 

 found on the surface and the number in the soil was about half of the 

 number found in the control plots. On another plot, a second 

 application was given three days after the first with the result that 

 at the end of the week only about 5 per cent, of the former number 

 remained. Nicotine solution 40% and nicotine sulphate 40% also 

 give good results, if the soil is well drenched. If enough of the solution 

 is put on the beds, a very few applications should rid the house of 

 this pest. 



Pettit (E. H.). Report of the Department of Entomology.— Fifty -fifth 

 Ann. Rept. Michigan State Bd. Agric. for Year ending 30fh 

 June 1916, Lansing. 30th June 1916, p. 186. [Received 29th 

 August 1917.] 



The inspection of apiaries has been carried on and a number of 

 demonstrations in disease control have been held, but more inspectors 

 are required to make the work efficient. Both American and European 

 foulbrood are spreading over the State, and owners of apiaries are 

 unable to cope with the disease, being unfamiliar \n\\\ the symptoms 

 and ignorant of the treatment. A change in the law providing for 

 deputy inspectors is advocated. 



Pettit (R H.). Report of the EntomoIogist.^-Tw'gn/?/-nm/^7i Ann. Rept. 

 Expt. Sta. Michigan Agric. Coll. for Year ending 30th June 1916, 

 Lansing, 30th June 1916, pp. 281-282. [Received 29th August 

 1917.] 



The most notable event of the year was the serious invasion of the 

 bean-maggot [see this Review, Ser. A, iv, p. 527], and of the red cherry 

 leaf beetle [Gcderucella cavicollis]. The work of rearing parasites of 

 the San Jose scale \Aspidiotus perniciosus] has progressed, several 

 further species having been added to the list. The control work by 

 means of parasites has distinctly improved the conditions in several 

 localities, when employed in conjunction with spraying. An attempt 

 to introduce the European parasite of the tamarack saw-fly was 

 unsuccessful ; a further attempt will be made ^vith fresh material 

 from Europe. 



RuGGLEs (A. G.). Miscellaneous Notes on Economic Work ; Orchard 

 and Shade Tree Insects, Spraying, Truck and Field Crops.— Sixteenth 

 Rept. Minnesota State Entomologist for 1915 and 1916, St. Anthony 

 Park, 1st December 1916, pp. 59-64. [Received 7th August 1917. J 



Spraying experiments in Minnesota during the two years under 

 review have demonstrated that arsenate of lead is a better spray for 

 potatoes than Paris green. It is important to apply this before the 

 eggs of the potato beetle hatch. If applied when the spring beetles are 

 flying, it will stick to the leaves through the rains and the larvae will 

 feed on the poison when they hatch. Two sprayings in the season are 



