158 EXPERIMENT STATION RECORD. 



mixture. Ten instead of 60 gal. was the amount intended. The correet 

 proportions are: Lime, G lbs.; salt, 2 lbs.; sulphur, 3 lbs.; water, 10 gal. 



With this correction are added the following supplementary formulas: 



HilgarWs sulphid of potash wash. — Caustic soda (98°), 1 lb.; commer- 

 cial potash, 1 lb.; sulphur, 3 lbs. Boil together 1 hour and then add 

 20 lbs. of whale-oil soap dissolved in hot water and boil a half hour. 

 Dilute this mixture to 100 gal. and apply hot. 



Pierce's Bordeaux mixture. — Bluestone, 5 lbs.; lime, 10 lbs. ; Water, 

 45 gal. Prepare in the same manner as other Bordeaux mixtures. 

 Excellent results have been obtained with this as a remedy for leaf- 

 curl of the peach. 



Paris green and Bordeaux mixture. — raris green may be stirred into 

 the Bordeaux mixture in the usual proportion of 1 :200. 



New Coccidii of the digestive tube of Myriapods, L. Leger (Compt. Haul. 

 Acad. Sri. Paris, 124 (ISO?), No. 17, pp. 901-903). 



Descriptive notes on two Coccidas, T. D. A. Cockerell (Ent., SO {1897), No. 

 404, pp. 12-14). — Lecaniodiaspis celtides and Pnlvinaria innumerabilis are described. 



Classification of the Ort optera according to the characters of the digestive 

 apparatus, L. Bordas< Compt. Bend. Acad. Sci. Paris, 124(1897), Xo. 15, pp. 821-823).— 

 The Orthoptera are divided into two suborders, Acolotasia and Colotasia, character- 

 ized by the presence in the one and by the absence in the other of intestinal diver- 

 ticula. The number and disposition of the Malpighian tubes and the internal 

 structure of the so-called gizzard permit of distinguishing the families Phasmid.r, 

 Forficulidse, Blattidse, Mantidse, Acridiidae, Locustidse, and Gryllid;e. The lirst two 

 belong to the Acolotasia, the rest to tho Colotasia. 



Changes in fauna due to man's agency, T. D. A. Cockerell (Nature, 55 (1897), 

 No. 1429, pp. 402, 402). — The author takes his example from the distribution of 

 Coccidae. 



Evolution of Lepidoptera, 6. M. von LINDEN (Biol. Centr. Bl.,17 (1897), pp. 179- 

 190,213-220; abs. in Jour. Roy, Micros. Soc. [Loftrfow], 1897, No. 3, p. 201).— A dis- 

 cussion of Eimer's work on the origin of the specis of Lepidoptera. 



The biology of plant lice of the subfamilies, Aphididae and Pemphigidae, A. 

 Mordwilko (Arbeit. Zool. Lob. Univ. Warschau, 1S96, pp. 23-140, illustrated [Rus- 

 sian] ; abs. in Zool. Centr. Bl., 4 (1897), No. 7, pp. 251-254). — The forms studied were 

 Bhopalo8iphum ribis, Aphis farfarw, A. persicw, A. radicola n. sp.. A. mail, A. brassicae, 

 Dryobiiis roboris, Trama radicis, Schizoneura corni, Pemphigus carulescens, P. ulmi, etc. 

 The new species, A. radicola, is found in summer on Rumex crispus and an undeter- 

 mined species of Grama. It bears some resemblance to A. cratcegi. 



How flowers attract insects, F. Plateau (Bui. Acad. Boy. Sci. Belgique, ser. 3, 

 30 (1S95), pp. 40G-4SS ; 32 (1896), pp. 505-5S4, pi. 1 ; 33 (1897), pp. 17-41; abs. in Jour. 

 Boy. Micros. Soc. [London], 1897, No. 2, p. 121; Naturwiss. Rundschau, 12 (1S97), No. 32, 

 p. 407). — Experiments were made chiefly with Dahlia variabilis, lobelia erinus, Oeno- 

 thera biennis, Delphinium ajacis, Ipomcea purpurea, Centaurea cyanus, and Digitalis 

 purpurea. Conclusions adverse to those of Darwin are arrived at. In the case of 

 the Composite the removal of the conspicuous ray flowers had little effect in dimin- 

 ishing the number of insects that visited them. Similar results were obtained with 

 other flowers. Covering the flowers w r ith leaves had little effect. The author con- 

 cludes that insects are attracted to flowers by the sense of smell rather than by that 

 of sight. He further found that the different colors of flowers of the same species 

 seemed equally attractive. 



The larval state of H3 r poderma bovis, P. Koorevaar (Tijdschr. Nederl. Dicrk. 

 Verein., 2, ser., 5 (1S9G), pp. 29-34). 



