9744 Entomological Society. 



tiliaria miglit have been expected to be, if those forms had in fact been two species 

 instead of the sexes of one. The specimen was sexually a female, and iho abdomen 

 was appaieiiily disleniled with eg<;s ; the general colour was midway between the 

 colours of the ordinary male and female, hut the size and the markings were those of 

 the male. He had l)een puzzled to know how to describe it; he would not be without 

 precedeiit if he called it a " hermaphrodite," or, adopiing the nomenclature of Mr. 

 Newman (Zool. for 1851, Appendix, p. cxl., where the distinct phenomena often con- 

 founded under the term hermaphrodite were classified), a "hemigynous" specimen. Mr. 

 Dunning doubled, however, whether an union in the single individual of the structural 

 differences between the sexes whs not neressary to consliuUe hemigynism, m whether 

 an individual which presented the structure of cue sex throughout, but the cohnir and 

 external markings of the other, was properly hemi.rynnus; such an individual was 

 abnormal, certainly, but were the superficial differences from the typical form anything 

 uiure than skin-disease or cutaneous eruptions? The absence of any "addiliim to or 

 alteration of a part or organ" prevented the ap;)lication of a theory of " dimorphism" 

 as recenily enunciated by Mr. Pascoe ; and ihe isolation of the case excluded alike 

 the "polymorphism" and "local form" of Mr. A. U.Wallace (see Tr. Linn. Sue. 

 XXV. 5, 10), and the theory of " mimetic resemblance" of Mr. Bates, to establish any 

 of which a solitary example was insufficient, and a large number of instances — a more 

 or less permanent race — was rci|uired. There seemed to be nothing left but to fall 

 back upon the old term "variation ;" at the same time the variatiou was not simple, 

 casual, aimless, but in a definite direction, as if designed ; it was the case of a female 

 retaining essentially her sex, but having an unmistakeable bias or tendency to assume 

 the garb and outward appearance of the male ; he would exhibit the insect as Fidonia 

 piniaria, an andromorphous variety of the female. 



Mr. J. J. Weir suggested that " dichromatism," a "dichromatic variety," would 

 denote the phenomenon in question. 



Prof. Westwood hoped never again to have heard the word hermaphrodite applied 

 to the abnormal forms under discussion ; the best and only ])roper term was that given 

 by Prof. Lacordaire, "gynandromorphous." He thought thai, at all events some cases, 

 where the differences were external only and not structural, were truly cases of gynan- 

 dromorpliism. For instance, he had an Orange-tip butterfly {Anlhnchnris Cardaiiiines), 

 which was female in every respect, except that on the tip of one fore wing were about 

 a dozen of the bright orange scales which characterized the male; he regarded that 

 specimen as poisussing in it>Llf ihe rudiments of two distinct crcatuies, a male and a 

 female, and that the female influence had so far predominated as to have absorbed the 

 male, except in that small portion of the wing where the male influence prevailed. 

 With respect to variation generally, no attempt to classify the various forms and phases 

 of it had yet been made; the subject was a wide one, but it would have to be dealt 

 with, and in the hands of a Darwin might be made of surjiassing interest and 

 value. 



Paper read. 



Mr. J. S. Baly read a paper entitled " Descriptions of New Genera and Species of 

 Phytophaga." Twenty species were described, five belonging to the Eumolpidfe, the 

 remainder to the Galerucida; ; two new genera were characterized under the name of 

 Hylaspes and Buphonida, both of the subfamily Gallerucinae.— /. W. D. 



