366 EXPERIMENT STATION RECORD. 



The enemies of agriculture, C. Rampon (Les ennemis de Vagriculture Nancy: 

 Berger-Levranlt $ Co., 1898, pp. VIII -\- 40S,_ Jigs. 140).— Treats of insect injuries, fun- 

 gus attacks, weeds, etc. 



Nematodes in coffee-plant roots, A. Zimmermanx (Meded. S' Lands Plantcntuin, 

 98), pp. 64, pis. ?, figs. 17). 



The use of copper fungicides in forest protection, C. von Tubeuf (Forstl. 

 Naturw. Ztschr., 7 {1898), No. 7, pp. 253-257). 



Handbook for the preparation and use of chemical agents for the prevention 

 of plant diseases, M. Hollrung ( Handbuvh der Chemischen Mittel t/egen Pflanzen- 

 Jcranhheiten. Herstellung und Anwendung im Grosser*. Berlin: Paul Parey, 1898, pp. 

 I V -\- 178).— This handbook, although from its title it would appear to beoue dealing 

 only with the preparation and use of fungicides, includes insecticides as well. The 

 work is divided into 3 parts, the titles being animal, vegetable, and mineral sub- 

 stances, the latter being arranged according to inorganic and organic substances. 



The literature of Europe and America has been well reviewed, and the information 

 is fully up to date. More than 125 substances which are considered as having fun- 

 gicidal or insecticidal value are discussed and numerous formulas given for their 

 preparation. In many cases the specific value of the chemical agents for the pre- 

 vention of certain inserts or diseases is stated. The author has made a valuable 

 contribution to the literature of the subject. 



ENTOMOLOGY. 



The weight of bees and the loads they cany, C. P. Gillette 

 (Proc. Soc. Prom. Agr. Sci., 1897, pp. 60-63). — A large number of weigh- 

 ings were made, which resulted in showing that outgoing pure Italian 

 workers average 1/285 gm. or 5,578 bees to the pound; incoming honey- 

 laden workers, 1.982 gm. or 3,532 to the pound: incoming pollen -laden 

 workers, 1.349 gm. or 5,594 to the pound; incoming pollen bearers, 

 1.285 gm. or 5,447 to the pound, and drones, 3.173 gm. or 2,206 to the 

 pound. 



The weights were taken of honey stomachs from incoming workers, 

 of honey loads and pollen loads, with the following average results: 

 Honey stomachs, 0.879 gm. or 7,904 to the pound; honey loads, 0.638 

 gm. or 10,965 to the pound; and pollen loads, 0.173 gm. or 40,580 to the 

 pound. The object of weighing was to determine the truth of the state- 

 ment often made by bee keepers that pollen bearers also bear honey. 

 In no case was it found that such was the case. What little honey is 

 found in the stomach or used in sticking pollen to the legs seems to be 

 a store carried with the bee from the hive. 



Pterophoridae of North America, C. H. Fernald (Massachusetts 

 Agr. Col. Rpt. 1897, pp. 85-162, pis. 9).— The subject is treated mono- 

 graphically. After briefly noting the wide geographical distribution, 

 that none of this family have thus far been recognized among fossils, 

 and the few natural enemies (Pimpla pterophori, IAmneria pterophorce, 

 and Ichneumon hum Ms), the author proceeds with a historical resume of 

 the literature, and an account of the structure and habits, systematic 

 position, and characteristics of the family, Anally treating the various 

 species in detail. Synoptic tables are given with each genus. 



