ECONOMIC ZOOLOGY — ENTOMOLOGY. 157 



effective with the young plants and consist principally in collection and burn- 

 ing of all diseased parts, though spraying with Bordeaux mixture is also sug- 

 gested. 



Micro-organisms of maple sap. — III, Technical description of certain 

 bacteria occurring in maple sap, H. A. Edson and C. W. Carpenter {Vermont 

 Sta. Rpt. 1912, pp. 475-602, pis. 8). — The authors give an account of Bacillus 

 aceris n. sp., an organism causing a certain type of stringy maple sap, the 

 morphological and other features of the organism being described at length. 

 A brief description is also given of the pink cocci of maple sap, which appear to 

 belong to the type of Micrococcvs roseus. The contribution concludes with an 

 account of the green fluorescent bacteria occurring in maple sap, 42 strains of 

 which were investigated, 7 being exhaustively studied. All the strains seem to 

 belong to the liqucfaciens and nonliguefaciens varieties of Pseudomonas fluor- 

 escens. 



A bibliography is appended. 



Fruiting bodies of dry rot fungns, K, HAVELfK {Ziva [Bohemia], 1912, 

 p. 13; abs. in Bat. CentU., 122 (1913), No. Jf, p. 97).— After a study of the 

 formation of the fruiting bodies of Mcrulvus lacrymans, the author concludes 

 that the development and morphological characters of the hymenium depend 

 entirely upon its position and the degree of moisture, and that the different 

 forms observed are only biological phenomena, having no value as systematic 

 characters. 



Recent observations on dry rot, K. HAVELfK (CentN. Gesam. Forstw.. 39 

 (1913), No. 2, pp. 60-65). — The author briefly sums up some results of observa- 

 tions recently made on the various rots of structural timber, among these 

 Lenzites, PoJyportis vaporarius, Coniophora cereheUa, and in particular Meruliiis 

 lacrymans. 



The last-named is said to be a most dangerous rot of houses, tending to spread 

 to every part of the building and to extend its attack to neighboring structures, 

 and being very difficult and expensive tp eradicate when once estnblished. It is 

 said to propagate itself either by a very delicate mycelium or by spores, the 

 latter being given off from each 0.5 mm. square of fruiting surface at the rate 

 of from 60 to 200 every five minutes. It is said to be not always, if ever, 

 dependent upon rottenness, moistui-e, or warmth, though favored by these, 

 especially the last. It is thought to be often brought into houses with materials 

 used in repairs, etc., or on tools previously used-^ on infected structures. It has 

 frequently been found in the neighborhood of telephone booths, its appearance 

 being ascribed to the moisture and warmth of the batteries or to the lack of 

 ventilation, infected sawdust, etc., in the walls of the booths. It is recom- 

 mended that buildings be better ventilated, that floors in suspected buildings be 

 laid in asphalt, and that all tools and materials used in repairs be rigidly in- 

 spected or disinfected. 



The wetting power of fungicides, H. Fonzes-Diacon (Prog. Agr. et Vit. 

 (Ed. VEst-Centrc), 34 (1913), No. 11, pp. 331, 352).— On account of the number 

 of new fungicides that are advertised and the claims made for them, the author 

 recommends their testing by making up about a liter of the solution and dipping 

 into it a freshly cut grape leaf. Upon drying, the covering power of the fungi- 

 cide will be shown by the deposit which is left on the leaf. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



Index zoologicus, II, C. O. Watekhouse, edited by D. Sharp (London, 

 1912, pp. 32^).- This second volume (E. S. R., 14, p. 844) consists of an alpha- 

 betical list of names of genera and subgenera proposed for use in zoology as 

 recorded in the Zoological Record, volumes 38 to 47, inclusive (1901-1910), and 



