9 



of the eggs and to the cold spring. The woolH aphis [Eriosotna lani- 

 gerum], however, was very injurious and appears to be increasing ; 

 climatic conditions have favoured this species and a numerous spring 

 generation is probable. The Colorado potato beetle [Leptinotarsa 

 decemlineata], which caused much alarm by its sudden appearance in 

 the previous year [see preceding paper], was apparently successfully 

 exterminated, and has made no further appearance. 



Special papers are devoted to the question of spray materials and 

 machinery, experimental work, codling moth investigations, etc. 

 Dust spraying has been tried to some extent, but more detailed work 

 is required before this method can be definitely recommended in 

 preference to liquid spraying. 



Report on Operations under the Horticultural Inspection Law. — Bull. 

 State Entomologist Nebraska, Lincoln, no. 5, 10th April 1917, 



15 pp, [Received 2nd November 1918.] 



The following insects were intercepted during 1915-1917 : — Eggs 

 of the European tussock moth [Orgyia antiqua] on Tamarix ; Carabids 

 and Staphylinid beetles from Holland ; Aleurodes spp, on azaleas 

 from Belgium ; Aphids on Berberis, azaleas, hydrangeas and pears ; 

 Aspidiotiis hederae on palms : Lepidosaphes idmi on Buxus ; and 

 Lecanium sp. on spruce. 



SwENK (M, H.). How to fight Grasshoppers.— Sw^L State Entomologist j 



Nebraska, Lincoln, no. 6, 12th June 1918, 3 pp., 1 fig. [Received V 



2nd November 1918.] 

 tSwENK (M. H.). Grasshopper Control. — Nebraska Coll. Agric, 



Lincoln, Emergency Bull, no, 17, 25th July 1917, 4 pp. 



[Received 2nd November 1918.] ^ 



The first of these is a popular bulletin giving some practical suggestions 

 as to the use of poison-baits for kilhng grasshoppers and describing 

 the construction of a hopperdozer for collecting the insects from the 

 fields. Owing to the present difficulty of obtaining wheat bran, 

 the following alternative is suggested : lucerne meal 15 lb., Paris 

 green 10 oz. (or white arsenic 1 lb.), cattle molasses 1 U.S. gal, squeezed 

 and ground up lemons 4, water 6 U.S. gals. 



The second bulletin, issued in view of the heavy infestation of grass- 

 hoppers expected in Nebraska in the summer of 1918, gives directions 

 for the preparation and application of poison-baits and describes 

 the construction and use of the hopperdozer. 



SwENK (M, H.), The Sugar-beet Web worm and its Control. — Bull. 

 State Entomologist Nebraska, Lincoln, no. 7, 24th August 1918, 



16 pp., 4 figs, [Received 2nd November 1918.] 



The most injurious insect in Nebraska during 1918, apart from 

 grasshoppers, was Loxostege sticticalis (sugar-beet webworm). 

 The loss caused by the first generation alone throughout the 

 State has been estimated at about £30,000. The outbreak was 

 preceded by heavy flights of moths from 24th May to 13th June. 

 Early in June eggs were laid on pigweed, lamb's quarters and Russian 

 thistle, and in beet and lucerne fields. By 18th June the caterpillars 



