THE CANADIAN ENTOMOLOGIST- 53 



directions where to look for it. It does not appear to be visible. Twelve 

 after the head are distinctly seen in all the large lepidopterous larvas, and 

 any one can satisfy himself of that if he will examine a caterpillar of one 

 of the large Borabycida^ or Sphinges. The. segments are distinct in many 

 butterfly larvse, as for exam})le, D. archippus. Now on page 82, Mr. 

 Scudder gives a magnified figure of the larva of ArcJiippiis from Burgess, 

 in which the thoracic segments are numbered i to 3, and the abdominal i 

 to 9, making 12 without the head. On page 19 we read : "Among the 

 butterflies these appendages (pro-legs) are always borne by the 3rd to the 

 6th abdominal segments, and by the last segment, leaving thus a siniilaf 

 space wWiout support between the true and false legs, and between the terminal 

 and preceding false legs." Plainly this accounts for but 12 segments, as 

 these " similar spaces " are two segments in each case. Three thoracic, 

 bearing legs, 2 segments "without support," 4 with false legs, 2 more 

 " without support," and the " terminal " segment. That is 12. I should 

 have regarded the statement that there were 13 segments without the head 

 as an error of the printer ; but on page 239, the author undertakes to 

 conceive a picture of the primeval butterfly, and says : " The caterpillar 

 had a rounded head, a body composed of 13 segments," &c. Therefore 

 I should like an explanation, and a hint as to where one is to look to find 

 this 13th segment. It is hardly necessary to count segments which are 

 invisible to the naked eye. 



13. On Apaturas " Herse " and " Lycaon." 



In 1833, Boisduval and Leconte, in Lep. de TAmer. Sept., described 

 and figured two species of Apatura as Celtis and Clyto?i, and for more than 

 a generation these names were unchallenged. In 1869, Mr. A. G. Butler, 

 in his Catalogue of Di. Lep., described by f'abricius in the Collection of 

 the Brit. Museum, introduced Lycaon ^ and Herse $, Fab. Ent. Syst., as 

 of one and same species, and remarked : " This species is well figured in 

 Jones's unpublished ' Icones ' ; it comes very near a new species figured 

 by Mr, Edwards " (x\. Alicia). All that Fabricius himself knew of these 

 species was from the drawings, so far as appears, and his description is 

 taken directly from the drawings. What part of the globe the butterflies 

 came from he did not know, as in both cases he says " Habitat ." 



In 187 1, Kirby's Catalogue followed Butler, giving Lycaon as $ , Herse 

 as $ , of one and the same species, but not one identical with either Celtis 

 or Clyton. In this Catalogue. Lycaon stands No. 34 and Celtis No. 38 in 



