22 INTRODUCTION. 



diagram, to afford a comparison with the others, and to illustrate the denomination 

 of Thysanurifomi, which has been assigned to it. See N. 24, Plate iii. 



Fifthly : a cylindrical larva, nearly naked, with a very large head, often globular, 

 and attached to the body by a long neck ; characteristically distinguished from the 

 Other subdivision by its bluntness and abrupt termination behind : the metamorphosis 

 resembles that of one of the divisions of the tribe of Phalaenidae, the pupa being 

 covered by a convoluted leaf Hence in the Vienna Catalogue the name of tortrici- 

 formes is assigned to the larva of family A of the third great subdivision, which com- 

 prises this form. In the diagram in the third plate are exhibited two forms of this 

 larva ; one of the Erycinidse at the boundary of the fourth tribe, and one of the true 

 Hesperidse. In order to illustrate this preliminary sketch of the five types of form 

 of the metamorphosis of the true Papilionidae, I shall repeat the denominations which 

 wiU be more fully explained hereafter : thus the first division, according to the larvae, 

 has been named vermiform, the second julifbrm or cJiilognathiform, the third scolopen- 

 driform or chilopodiform, the fourth thysanuriform, and the fifth anopluriform. These 

 separate groups, agreeably to the plan of Mr. Macleay in the Annulosa Javanica, 

 will in future be denominated stirpes. 



In the tribe of Sphinigidce, I have distinguished the following types of form, which 

 afford characters to the subdivisions or stirpes. As the entire metamorphosis will be 

 detailed in the course of the work, I shall in this preliminary sketch give only a con- 

 cise notice of the larvae, without attempting their disposition in a natural order. We 

 observe, then. 



First : a vermiform larva, sluggish, somewhat hairy, with a small retractile head, 

 and minute obscure feet. This larva, in the Wiener Verzeichnis, constitutes the Family 

 G of the genus Sphinx, p. 44, &c. Larvce phalceniformes, Scheinspinnerraupen, and 

 the perfect insect the Sphinges maculates, les Sphinx a comes de helier. Reaum. and 

 Geoflfr. It deviates more than the other stirpes from the regular type of the sphin- 

 gida;, and if the stirpes are arranged according to the principles of Mr. Macleay, it 

 belongs to the aberrant groupes ; but the determination of its affinity remains for a 

 future investigation. Typical genus Zygcena of Fabricius. 



Secondly : a cylindrical larva more slender and elongated than in the other stirpes ; 

 it is generally without lateral ocelli, and in one of the sections it is somewhat downy ; 

 the head is globular, and the abdominal horn short and rigid; the latter does not 

 always exist, but in place of it is observed a specular mark. It comprises the famihes 

 E and F of the Vienna Catalogue, p. 43 and 44. The former is characterized as having 

 larv^ elongates, Langleibraupen, the latter larvas subpilos(B, Mikhhaarraupen ; Sphinges 

 caiidiberbes and hyalince. The Sesice of Mr. Haworth, in his Lepidoptera Britannica, 

 including both divisions, tecta; and denudatw, constitute this stirps. The perfect 



insect 



