124 Analytical Notices ofBooks^ 



succeeding one by means of Apatura, Limenitis, and a new genus here- 

 after to be described, which is perfectly intermediate. 



The larva of the Thysanuriform stirps is characterized by two rigid 

 setae or spines, varying in length and size, appended to the posterior extre- 

 mity of the body, and pointing directly backwards. The pupa is smooth, 

 shining, much diversified in form, and attached as in the Chilopodiform 

 Stirps. The perfect insects are remarkable for the prevalence of a brown 

 colour on the surface of the wings, which in many species assumes a 

 gloss of blue of transcendant brilliancy : their palpi and feet resemble 

 nearly those of the preceding stirps : their antennae are filiform, with a 

 slender and very gradually incrassated club which occupies a very large 

 portion of their entire length. The genera Paphia, Morpho, and Hip- 

 parchia may be mentioned as examples of this group. 



In the remaining stirps, the Anopluriform, the larva is characterized 

 by a head comparatively of excessive size, and by the abrupt posterior 

 termination of its body without any appearance of caudal appendage. 

 The pupa is not naked, as in the other stirps, but is concealed by a foUi- 

 culus, or by a covering of a convoluted leaf, and its surface is smooth 

 resembling that of the nocturnal Lepidoptera. The characters of the 

 imago are variously modified in the ErycincB, which approach the preced- 

 ing stirps, in the Hesperidce, typical of the present, and in the UranicB. 

 These, however, remain for more full developement hereafter. 



While noticing these respective stirps, it has been atempted to convey 

 some idea of the osculant affinities which connect them together. That 

 which should exist between the last and the first of them is not minutely 

 explained, yet that their connexion cannot be remote is evident from the 

 one having been termed by Linnaeus Plebeii urbicoli, and the other 

 Plebeii rurales. The circular succession of the affinities among the 

 larvae is strikingly illustrated by a diagram contained in one of the plates, 

 which exhibits the most prominent types of each of the stirpes, and some 

 of the aberrant forms which indicate their gradual approach to each other. 



At this point we must for the present stop in that detailed analysis to 

 which we have been induced by the intrinsic value and high interest of 

 the views advanced by Dr. Horsfield. In the general arrangement pro- 

 posed in his introductory remarks, he has availed himself of information 

 relating to his subject, collected from all quarters of the globe. The 



