1864.] 501 



named according to the form of the larva, from their resemblance to 



the five t3'pica groups of the AniPtaholn. 



First Stirps, Vermiform. 



Second " Juliform or Ohilognathiform. 



Third " Scolopendriform or Chilopodiform. 



Fourth " Thysanuriform. 



Fifth " Anopluriform. 



To prevent any misapprehension of the application of these terms, 

 Mr. Macleay says (H. E. p. 423.): "The distinction, however, between 

 affinity and analogy, is perhaps nowhere in Entomology more necessary 

 to be attended to than here; since, in terming larvae, Chiloynathi formes 

 or Chllopodlformes^ it is not meant that they are Scolopendrse^ or Juli. 

 or even near to them in affinity, but only that they are so constructed 

 that certain analogical circumstances attending them strongly remind 

 us of these Ametahola.'' 



Id the second stirps, the typical division of which (the fjimily Papi- 

 lioniJse of Leach,) we have just completed, the following characteris- 

 tics are especially prominent: 



'^Larva of a cylindrical form, generally swelled or thickened at the 

 fourth or fifth section of the body, attenuated towards the head and 

 posterior extremity; in the typical genera naked, or covered with short, 

 obtuse, fleshy protuberances ; in the extreme genera at the boundary 

 of the neighboring groups, covered with a close silky down, or with 

 short scattered hairs, most remarkably distinguished by a furcula or 

 forked tentaculum, situated between the head and neck, which may be 

 drawn back or thrust forward at pleasure." 



"/^wyuo, angulated and mostly tuberculated ; in the typical genera, 

 and in those at the confines of the first group, attached by the posterior 

 extremity, braced and vertically suspended with the head upwards; in 

 the genera approaching the third stirps, perpendicularly suspended, 

 according to the habits of that stirps. Representing the ChUognathi- 

 form or Juliform Amefabala." 



The genus Papilio (including Ornithoptera and Atrophaneura,) is 

 at present very unwieldy; species are associated, which, except in their 

 nervular arrangement, have but little generic relation with each other, 

 yet sufficient to unite them under this system, provided that they were 

 also agreed in their preparatory stages; but, according to the third law, 

 cited above, we should naturally expect analogical divisions in the genus, 



