20 



PSYCHE. 



[February igoo. 



the other males who display female 

 wings. In another series of experi- 

 ments the wings were cnt entirely oft" 

 of both males and females, and also 

 all of the scales were brnshed oft" 

 their bodies; and yet these shabby 

 looking males were readily accepted by 

 normal females, nor could I see that 

 normal males tlisplayed anv aversion to 

 mating with the wingless females. We 

 are, therefore, forced to conclude that 

 the melanic coloration of the male 

 has not been brought about through the 

 agenc}' of sexual selection on the part 

 of the female. In this connection it is 

 interesting to notice that Plateau, 1S97, 

 concludes that insects are attracted 

 only by tlie odor of flowers and not 

 at all by their color. 



In conclusion it gives me great pleas- 

 ure to express my gratitude to Miss 

 Caroline G. Soule for advice and aid ; 

 to W. L. Tower Esq. for his kindness in 

 collecting many cocoons of the moth ; 

 and to Dr. Robert W. Fuller who pro- 

 vided me with reagents used in the 

 manufacture of ethyl mercaptan. 



Summary of Conclusions. — The 

 male is positively chemotactic toward 

 some sulistance which emanates from 

 the abdomen of the female, and which 

 he perceives through olfictory organs 

 situated upon his antennae. 



Females 30-60 hours old are much 

 more attractive to males than are 

 young females 5-10 hours old. Vir- 

 gin females are somewhat more attrac- 

 tive than are fertilized ones of the same 

 age. 



The male will mate at least four 

 times either with the same or with dif- 

 ferent females. 



Neither males nor females pay any 

 attention to the appearance of their 

 partners. The melanic colors of the 

 male have not been brought about 

 through sexual selection ou the part ot 

 the fem.ale. 



Literature qj-'OTED. 



Hauser, G. 18S0; Zeitschrift fiir wissen. 

 Zool., Bd. XXXIV, p. 367-403, 3 Taf. 



Kraepelin, K. 18S3 ; Ueber des Geruchsor- 

 gane der Gliedertiere, 48 pp. 3 Taf., 

 Hambiii-g. 



Maver, A. G. 1897; Bulletin Museum 

 Comp. Zool. at Harvard Coll., Vol. xxx, 

 p. 178-180, PI. 3, Figs. 24-41. 



Packard, A. S. 1S98; A Text-Book of Ento- 

 mology, p. VI -|- 729, 654 Figs. Mac- 

 millan & Co. 



Plateau, F. 1S97; Bull. Acad. Roy. Sci. 

 Belgique, Tom. xxxiv, p. 601-644, 847- 

 SSo. 



Soule, Caroline G. 1894; Psyche, The jour- 

 nal of the Cambridge Entomological 

 Club, Vol. 7, p. 155. 

 Harvard University, 



Cambridge , Massachusetts. 



Entomology for the young. — Ginn 

 and Co. of Boston have just issued a second 

 series of Stories of Insect Life, by Mary E. 

 Murtfeldt and Clarence Moores Weed, in- 

 tended for children. It is a little reading 

 book of 72 pages, well illustrated, and in its 

 few chapters ranges a wide field. 



A considerable portion of Blatchley's 

 Gleanings from Nature (The Nature Publish- 

 ing Co., Indianapolis), intended to awaken 

 an interest in nature in the youth of Indiana 

 particularly, is devoted to insects and espe- 

 cially to Orthoptera. A good many inter- 

 esting facts may be found in it. 



