234 THE ENTOMOLOGIST. 



D, J. ScouRFiELD. The Logarithmic Plotting of certain Biological Data. 

 (1897, Journ. Quekett Microsc. Club,' pp. 419-23, pi. xx.) 



The author advocates the use of logarithmically ruled sectional paper 

 for the graphic representation of certain biological data. This paper 

 is produced by " first of all drawing a series of lines at equal distances 

 apart, accordhig to any convenient scale, representing, say, the series 

 of numbers 1, 10, lOO', 1000, 10000, &c., the logarithms of which are 

 0, 1,2, 3, 4, &c., respectively, and then dividing the spaces so obtained 

 unequalli/ by lines drawn at distances equal to -BOIO, '4771, •6021, 

 •6990, •7781, &c., which are the logarithms of the numbers 2, 3, 4, 5, 

 6, &c." It is not possible to give an adequate idea of the method of 

 procedure without reprinting the whole of the tersely written paper, 

 but attention is drawn to it as likely to be of some use to those 

 entomologists who are investigating exhaustively such phenomena as 

 variation, &c. r W K 



Economic. — E. P. Felt. Ilhoitrated Descriptive Catalogue of some of 

 the more important Injurious and Beneficial Insects of New York State. 

 (1900, Bull. Soc. N. Y. State Mus. viii. No. 87, pp. 1-52, eighty-three 

 text figures.) 



E. E. Green discusses " Some Caterpillar Pests of the Tea- 

 Plant " (September, 1900, Circular, Botan. Gardens, Ceylon (1), 19, 

 pp. 239-65). Eleven species are described, and remedial measures 

 discussed. The importance of being beforehand with the caterpillars, 

 and of stamping out the earlier broods before they have time to breed 

 and extend their area of operation, is emphasized. 



Lepidoptera. — N. Kusnezov describes the protective coloration of the 

 wings of the Krimean Lihythea ceitis, and figures its attitude in repose, 

 which exactly resembles a dead leaf, the antennae and palpi being made 

 use of in the simulation (the butterfly being unique in this respect). 

 (Horae Entom, 1900, xxxv. ; summary and figure in 'Psyche,' 1901, 

 pp. 184-5.) 



Nenroptera. — G. A. Poujade notes a female French Odonate [Cor- 

 dulegaster annulatus, Latr.), in which the left antenna is composed of 

 three unequal bristles, articulated on a single large and deformed scape, 

 while the right antenna is normal (1899, Bull. Soc. Eut. France, 

 pp. 44-5, two figures). 



Orthoptera. — M. V. Slingerland records the discovery for the first 

 time in America of a European beneficial insect, Mantis religiosa (1900, 

 Entom. News, p. 18 ; see also /. c 1899, pp. 288-9, under the name of 

 Stagmomantis Carolina). 



Chr. Aurivillius describes forty-two species of Swedish Orthoptera, 

 of which about twenty-eight also occur in the British Isles (" Svensk 

 Insektfauna 2 Orthoptera" in Ent. Tidskrift, 1900, xxi. pp. 233-54, 

 fourteen text figures). 



G. W. K. 



