1919] ECONOMIC ZOOLOGY — ENTOMOLOGY. 549 



more common than usual; and the papaw snout beetle {Derolomxis hasalie), 

 which injured cotton squares, causing them to drop. 



Unusual nursery insects, H. B. Weiss (N. J. Dept. Agr. Circ. 2^ (1918), pp. 

 13, figs. 6). — Brief accounts are given of the minor insect pests met with in 

 New Jersey nurseries. These include the Iris-leaf miner {Agromyza laterelia), 

 which has damaged Japanese Iris in several New Jersey nurseries ; the sinuate 

 pear-tree borer, a large and serious infestation of which was discovered in 

 1918 in a nursery in the central portion of the State; the white poplar leaf 

 hopper {Idioceiiis cognutus), first observed at Irvington in the summer of 1917, 

 and since found at several other places in the State, usually on white poplar 

 nursery stock; a European poplar leaf miner (Zeugophora scutellaris) , which 

 feeds on the foliage of poplar (Populus deltoides) ; the lunate onion fly 

 (Etimerus strigatus), which was taken at Rutherford, South Orange, Riverton, 

 and several other places in the State in 1918, these being the first definite 

 records of its occurrence in New Jersey; and the sumac psyllid {Calophya 

 nigripcnnis) , which, while not seriously injurious, often attracts attention in 

 nurseries by reason of its abundance on Rlius copallinum (E. S. R., 40, p. 7.54). 



Insects of the season {Ann. Rpt. Ontario Agr. Col. and Expt. Farm, 44> (1918), 

 pp. 15-18). — This is a brief report of the occurrence of and work with the more 

 important insects of the year. 



Report of the entomolog'ist, D. T. Fitllaway ([Bien.] Rpt. Bd. Comrs. Agr. 

 and Forestry, Hawaii, 1917-18, pp. 5^-60). — This report relates to the propaga- 

 tion and distribution of beneficial insects, etc., for the biennial period ended 

 December 31, 1918. 



Insect and arachnid pests of 1917, R. S. Macdougall {Trans. Highland and 

 Agr. Soc. Scot., 5. ser., 30 {1918), pp. 56-96, figs. 20).— A discussion of the oc- 

 currence of and control measures for some of the more important insect and 

 arachnid pests of the year. 



Division of entomolog'y, annual report, 1916-17, C. P. Lounsbuey {Union 

 So. Africa Dept. Agr. Rpt. 1916-17, pp. 93-103). — This reports on the inspection, 

 regulatory, and investigational work conducted during the year ended March 

 31, 1917. 



Economic entomology, H. H. Tryon {Ami. Rpt. Dept. Agr. and Stock [Queens- 

 land'i, 1917-18, pp. 40-W. — A discussion of the occurrence of and work with 

 the more important insects of the year. 



Common insects and diseases of the apple, W. AV. Chase {Ga. Bd. Ent. Bui. 

 54 {1919), pp. 52, i)ls. 13, fig. i).— This replaces Bulletin 38 previously noted 

 (E. S. R., 29, p. 3.53). 



The more important insect enemies of the rose mallow in New Jersey, 

 H. B.Weiss (A". J. Dept. Agr. Circ. 25 {1919), pp. 9, pis. 4).— Substantially noted 

 from another source (E. S. R., 40, p. 754). 



Insect pests of stored grains and mill products, F. H. Latheop {Oreg. Agr. 

 Col., Ext. Bill. 228 {1919), pp. 4, flffs. 5).— A brief popular account. 



Insecticides and fungicides, F. T. Shutt {Canada Expt. Farms Rpt. 1918, 

 p. 24). — This brief account relates to the composition of calcium arsenate and 

 calcium arsenite. 



Reliable brands of calcium arsenate in the dry powder form contains arsenic 

 equivalent to approximately 40 per cent arsenic oxid, less than 1 per cent of 

 which is soluble in water. One brand analyzed, however, contained 32.75 per 

 cent arsenic oxid. The arsenical content of the paste forms is about half that 

 of the dry powder. Several brands of calcium arsenite showed an arsenious 

 oxid content varying from 14 to 24 per cent. In order that there be no risk 

 of injuring the foliage, it is advised that both the arsenate and arsenite be 



