490 



Froggatt (W. W.). a Descriptive Catalogue of the Scale Insects 

 (Coccidae) of Australia. — Agric. Gaz. N. S. W., Sydney, xxviii, 

 no. 7, July 1917, pp. 505-514. 



The sub-family Brachyscelinae contains the typical gall-making 

 Coccids, the males and females developing within the galls simul- 

 taneously with the growth of the aborted woody tissue. 



The species described are: — Ajyiomorpha attenuata, Frogg., and 

 A. bduerleni, Frogg., on an undetermined species of Eucalyptus ; 

 A. conica, Frogg., on Eucalyptus ; A. cucurbita, Full., on Eucalyptus 

 tmcinata ; A. dipsaciformis, Frogg., on Eucalyptus ; A. duplex, 

 Schrader, on several species of Eucalyptus ; A. excupula, Full., on 

 Eucalyptus ; A. jietcJieri, Full, on Eucalyptus rostrata (red gum), 

 E. bicolor (box gum), and E. regnans. 



Troop (J.), Report of the Entomological Department. — Twenty -ninth 

 Ann. Kept. Purdue Univ. Expt. Sta. for Yea)- ending 30th Ju7ie 

 1916, Lafayette, Ind., pp. 41-42. [Keceived 5th September 1917.] 



The codling moth [Cydia pomonella] was less destructive to the 

 apple crop of 1915 than usual, owing perhaps to seasonal influence 

 or to the presence of parasites. Experimental observations by means 

 of breeding cages and in the orchard were made in order to determine 

 the exact time at which to apply the second spray mixture. It was 

 found that the moths emerged over a period of more than two weeks ; 

 hence the application of the spray would be most efficacious if begun 

 when about one-half of the adults had emerged, since about 11 or 12 

 days usually elapse between the emergence of the adults and the 

 entrance of the larvae into the fruit. 



An unusual outbreak of flea-beetles occurred on maize, the surface 

 being scraped from the leaves and holes eaten through them, when 

 the plants were two to four inches high. As usual, they were also 

 very numerous on potatoes. 



Experiments were made on the use of proprietary washing 

 powders as insecticides, several common household kirfds being tried 

 against cabbage Aphids. It was found that only one or two fulfilled 

 the three requirements of spreading well, killing the insects on contact^ 

 and doing no injury to the plant. 



Greene (C. T.). Two New Cambium Miners (Diptera). — Jl. Agric. 

 Research, Washiyigton, B.C., x, no. 6, 6th August 1917, 

 pp. 313-317, 1 plate. 



The new cambium miners described in this paper are Agromyza 

 aceris, sp. n., reared from red maple {Acer rubrum), and A. amelan- 

 chieris, sp. n., from service berry or shad- bush [Amelanchier canadensis). 

 The trees attacked are apparently healthy and infested ones cannot 

 be detected by their outward appearance, as the larvae mine in the 

 cambium of the living tree, leaving a scar known as a " pith-ray 

 fleck," which can be detected only by removing the bark and exposing 

 the cambium. 



Both species mine downwards in the cambium of the trunk and 

 roots of the plant attacked, and, after reaching maturity, make their 

 exit, pupating in the ground about i^ to 1 inch to the side of the exit 



