474 



Sevekin (H. H. p.). Notes on the Behaviour of the Beet Leafhopper 



{Eutettix tenella, Baker). — //. Econ. Entont., Concord, N.H., 

 xii, no. 4, August 1919, pp. 303-308. 



The behaviour of Eutettix tenella during the period of swarming and 

 mating is described. This insect appears to be most active at night 

 and is occasionally attracted to light. 



DoANE (R. W.). U.S. Bur. Entom. Weevils in Australian Wheat in 

 California. — //. Econ. Entom., Concord, N.H., xii, no. 4, August 

 1919, pp. 308-312. 



Owing to shipping difficulties arising out of war conditions, wheat 

 has had to be stored for an unusual length of time in Australia. No 

 provisions had been made for the accumulation of such large quantities, 

 and ample opportunities were thus afforded for infestation by weevils 

 and other insects. In grain eventually shipped to California the 

 following beetles were found : Calandra oryzae, C. granaria, Tribolium 

 confusum (confused flour beetle), T. castaneum {ferrugineum), 

 Silvanvs surinamensis (saw-toothed grain beetle), Rhizoperthadominica 

 (lesser grain borer), Laemophloeits tnimituff (flat grain beetle), 

 and Tenehroides mauritanicus. The cosmopolitan parasite of grain 

 weevils, Mesaporus calandrae, How., was also very abundant. On 

 arrival at San Francisco some of the sacks had as much as 80 to 90 

 per cent, of their contents injured by weevils. The grain was taken 

 straight from the docks to the mills M'here it passed through the usual 

 screens to remove the straw, unthreshed heads and other rubbish. 

 Before use it passed through suction cleaners that draw off the light 

 grain, weed seeds, weevils, etc. These screenings, if containing very 

 many beetles, were burned, but if a good deal of grain was retained, 

 were used as food for pigs, sheep or poultry. All mills handling this 

 infested wheat were urged to malce some provision for the destruction 

 of the insects. Experiments made show that exposure to heat, with a 

 steam pressure of 80 to 1-50 pounds for twelve hours, killed all the 

 beetles. Various kinds of boxes and rooms were equipped for this 

 pu.rpose, details of which are given. In some cases the wheat was 

 sprayed by means of hand-pumps with carbon tetrachloride at the 

 rate'of 2 tF.S. gals, of liquid to 30 tons of the grain. Wheat treated 

 in this way is not injured, and if the bins are tightly closed for at least 

 two or three days, all weevils in them will be found dead. 



Severin (H. H. P.). Investigations of the Beet Leafhopper {Eutettix 

 tenella, Baker) in California. — Jl. Econ. Entom., Concord, N.H.^ 

 xii, no. 4, August 1919, pp. 312-326, 1 jilate. 



Many food-plants have been recorded for the beet leaf-hopper, 

 Eutettix tenella, Baker, the majority belonging to the saltbush family 

 (Chenapodiaceae), especially species of Atriplex. A Ust of plants is 

 given on which eggs have been deposited. These include Atriplex 

 expansa, A. rosea, A. semibaccata (Austrahan saltbush), Salsola kaH 

 var. tenuijolia (Russian thistle), and Erodium cicutarium (stork's-biU). 



As the food-plants in the cultivated area become dry the adults leave 

 them. The earliest record of their disappearance is between 25th 



