33 



to the larval period, and vice versa.'" Unfortunately for this conclusion, 

 the figures given by Mr. Edwards, or their reduction by Mr. Mel- 

 dola, refer in each case to the progeny of TFa^s/u'i, Telamonides and 

 Marcellus, and do not bear upon the question ; in every instance 

 given in the tables the progeny or resultant is Marcellus; Walshii and 

 Telamonides are the produce of wintering Chrysalides, and therefore 

 by Mr. Meldola's rule, should be, as they are, smaller than Marcellus, 

 which, on the other hand, is always the result of short lived sum- 

 mering chrysalids ; unless, however, some unknown factor plays a 

 part, Telamonides should be smaller than Walshii, because produced 

 later in the season, from wintering chrysalids; but here the opposite 

 is the truth. 



Mr. Scudder further observed that Mr. Edwards had not drawn 

 attention to the fact that Walshii and Telamonides belonged to the 

 same brood ; the former consists of earlier, the latter of later individ- 

 uals from wintering chrysalids ; the second brood of the species (the 

 first from short lived chrysalids) is Marcellus, and made up of the 

 mingled progeny of both Walshii and Telamonides. 



Mr. S. H. Scudder called the attention of the Section to 

 a Hesperian, in which ocelli were present. 



In a memoir published in 1831 by the Berlin Academy of Science, 

 Klug has reviewed the families of insects In which ocelli are present. 

 He states that they are wholly wanting in the rhopalocerous Lepidop- 

 tera, even in the Hesperians, and this assertion has been received up 

 to the present time. But in the male of the Papilio Accius of Smith- 

 Abbot a single ocellus Is found In the middle of the front, consisting 

 of a slight eminence as broad as the base of the antennaj, smooth and 

 lenticular; in the female, however, this eminence is divided into three 

 minute points, which together are of the same size as the single ele- 

 vation of the male; this seems to show that the male ocellus is formed 

 of three elements united. 



In all the heterocerous Lepidoptera which possess ocelli, these are 

 two in number, and are placed one behind each antenna, probably 

 therefore on the vertex. This difference is not extraordinary, for 

 among the Hemiptera some groups possess ocelli below, some 

 above the eyes, a difference still greater; while in other groups 



