122 Analytical Notices of Books. 



to be capable of completion .by the union of what appear to be its ex- 

 treme points, the Tortrices among the Phalcenidce, and the HesperidcB 

 among the Papilionidee; the latter, in various characters of the perfect 

 insect, but especially in the form of their larva, in its habitation, and in 

 the mode of its metamorphosis, approaching so nearly to the former as to 

 leave no doubt of the continuity of the series returning into itself, in which 

 the whole of the Lepidoptera are naturally disposed. The location of the 

 Pterophori, which, in their metamorphosis, greatly resemble the diurnal 

 Lepidoptera, remains yet to be determined. 



The Introduction concludes with a more developed view of the stirpes 

 of the Papilionidce than had before been given. It here becomes a lead- 

 ing object to point out the analogies between each type of larvee and the 

 ametabolous groups with which they correspond. The distinguishing 

 characters of the larvse of each stirps are explained ; the peculiarities of 

 the pupa are noticed; and those of the perfect insect are detailed. To 

 follow Dr. Horsfield through this portion of his work would require almost 

 that his very words should be copied : it is therefore at the risk of afford- 

 ing only a very imperfect view of the result of his labours that we at- 

 tempt their analysis. 



In the Vermiform stirps the larva is distinguished by an oblong body, 

 attenuated at both ends, in some cases depressed or slightly convex, in 

 others cylindrico-gibbous, appearing to consist of numerous scuta or 

 shields, distinctly divided by transverse striae, having a small retractile 

 head, and very short scarcely perceptible feet. This larva bears a strong 

 analogical resemblance to many of the Vermes, and even to the osculant 

 group in the neighbouring circle of the Crustacea which comprehends 

 Oniscus, &c. 



The pupa is obtuse at both ends, particularly at the anterior, is nearly 

 smooth, and is vertically suspended in the same manner as in the typical 

 stirps, its head upwards either erect or bending forwards, fixed by the tail, 

 and secured by an abdominal brace. The perfect insect is also compara- 

 tively simple, the whole of the stirps having been comprised in the lowest 

 rank of the Linnean arrangement as the Plebeii rurales: its palpi are 

 slender and of great length, extending in one species to the middle of the 

 antennse, the third joint elongate, naked, or covered only by minute 

 8ii»les: the antennae are either gradually thickened tovrards the apex, or 



