ENTOMOLOGY. 995 



Examination of Paris green and other arsenicals used in spraying-, (J. E. 

 Colby (California Sta. /.'/''■ 1904, pp. 44—47). — A number of samples of Paris green 

 were analyzed, and as a result of these tests it was found thai Paris green, mm offered 

 for sale in the California markets, is much better than in former years ami shows 

 comparatively small percentages of arsenious oxid soluble in water. The total 

 arsenious oxid shown in samples varied from 53.2 to 60.8 per cent. 



An official organization for controlling the enemies of plants, E. Tailis 

 (An. Asoc. Antiguos Alumnos Trust. Agr. Chile, 8 (1904), pp. 101-107, ph. .',).— An out- 

 line is presented of the official organization necessary for carrying out insecticide 

 work in destroying injurious insects. Notes are presented on fumigation with hydro- 

 cyanic-acid gas and spraying with various kinds of apparatus. 



Transvaal regulations to prevent introduction and spread of insect pests 

 and diseases of plants ( Natal Agr. Jour, and Min. Rec, ', I 1904 h ZVb, 12, pp. 1127- 

 1131). — A copy is given of an ordinance regarding the inspection of nurseries and 

 orchards and the control of the most serious insect and fungus pests. Particular 

 mention is made in the law of the introduction of grapevines, coffee plants, euca- 

 lyptus, and stone fruits. 



Anopheles claviger in winter and summer, » r. Schneidef i Korbl. Naturforsch. 

 Ver. Riga, {■? i 1904), pp. 41-45). — Attention is called to various points in the life 

 history of this species which would distinguish it from other species of mosquitoes. 



The structure of the honey cell, Bauee | Verhandl. Naturw. Ver. Karlsruhe, 17 

 (190.3-1). pp. 8*-ll*). — Details are given regarding the differences in angles and 

 construction of honey cells made by bumblebees, honeybees, species of Melipona, etc. 



Annual report of the Royal Sericultural Station of Padua (Ann. R. Staz. 

 llinnl. Padova, 32} 1903), />/>. 151, pi. l,figs. /i. — As in previous reportsof this station, 

 a general review is presented of the scientific and practical work carried on under the 

 auspices of the station at Padua and in other parts of Italy. The greater portion of 

 the report is occupied with accounts of the experimental work of the station. E. 

 Verson discusses sericulture in Italy and methods of extending this industry (pp. 

 L7-32). The status of silk raising in southern and central Italy is described and 

 suggestions are made for government aid for the encouragement of the industry. E. 

 Quajat discusses the subject of autumnal hibernation as interrupted by the tempo- 

 rary return of the high temperatures (pp. 33-42). It has been found that in order 

 that the eggs may be successfully hatched in August and September it may be neces- 

 sary to preserve them in cold storage for 45 to 60 days. In this way a premature 

 hatching is prevented. Notes are given on the results obtained from the application 

 of cold to silkworm eggs and on the action of the cold upon the eggs. The same 

 author reports briefly on experiments in the artificial coloration of silk (pp. 43-50). 

 White races of silkworms fed on material colored with a neutral red showed a red 

 coloration of the silk organ, the posterior portion being rose red, the anterior part 

 deeper red. and the muscles light red. The influence of Sudan III was seen in the 

 production of a pale rose-red color. The eggs from caterpillars fed on food colored 

 with methj lene blue exhibited either a greenish or a normal color. Eggs from cat- 

 erpillars fed on leaves colored with neutral red or Sudan showed a rose color. The 

 author believes that his experiments are too limited to permit drawing general con- 

 clusions regarding the possibility of artificial coloration of silk. E. Verson presents 

 an account of the regeneration of the thoracic feet of the silkworm (pp. 51-91). 

 Detailed note- are given on the anatomical structure of these organs and the process 

 of regeneration after the removal of one or more of the thoracic feet. A brief bibli- 

 ography of the subject i- appended to the article. The same author discusses the 

 general subject of variations in color in the cocoons of Lepidoptera I pp. 92-96 |. This 

 subject is discussed from the standpoint of protective coloration. The influence of 

 external conditions upon the physical properties of cocoons is discussed by E. Bisson 



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