INTRODUCTION. 39 



character of this stirps is established. Many other confirmations may be found in 

 the works of Sepp, Abbot, Roesel, Esper, Cramer, and Hiibner. 



The pupa of the Vermiform stirps, some of the peculiarities of which have already 

 been mentioned above, is strikingly illustrated on the fourth plate, in fig. 1, a. % a. 

 3, a. 4, a. and 5, a. By an oversight in the arrangement of the plate, the subjects 

 are given in a situation the reverse of that in which they are in general disposed. 

 This the reader is required to correct. In their natural attitude the anal part is 

 underneath, the head above. This pupa has upon the whole that attachment and 

 mode of suspension, which characterises the typical stirps : it is fixed by the tail 

 and secured in an erect attitude by a brace. Its chief peculiarities are an obtuse- 

 ness of both ends, especially of the superior, and comparatively an even surface. 



I have already remarked, that the perfect insect corresponds with the larva, as 

 far as regards simplicity of form. In the Linnaaan arrangement the group we are 

 now considering forms the last of the divisions, and with the name of Plebeians of 

 the lowest rank, Plebeji rurales, terminates the series of diurnal Lepidoptera. 

 According to the observations of Mr. Jones, the structure of the wings, as far as 

 regards the nervures, confirms the comparative simplicity of this stirps. But 

 although diminutive in size, the Papilionidae with Vermiform larvae possess, in many 

 cases, a beauty of form and an elegance of colouring which is not exceeded by any 

 other insects of this order. Some of the exotic species of this stirps, belonging to 

 die genera Myrine, Helicopis, and Poly ommatus, are distinguished from the whole 

 tribe, by the caudal extremities of their wings. 



In enumerating some of the more characteristic pecularities of the perfect insect, 

 I shall notice first the palpi : these are slender and of great length ; the covering of 

 scales or hairs on the basal aud intermediate joints is shorter and less in quantity 

 than in the other stirpes ; the third, or terminal joint, is directed forwards, compara- 

 tively of great length, and either naked or covered with minute scales. The genus 

 Myrine, belonging to the typical group, exhibits the greatest length of palpi that I 

 have observed in the whole tribe of Papilionidae : they extend to the middle of 

 the antennas. On the second and fourth plate the general character of the palpi 

 is exhibited ; viz. PI. ii, fig. 4, b. fig. 5, b. fig. 6, b. PI. iv, fig. 1, b, fig. 2, b. 

 fig. 5, b. 



The antenna; in the typical genera are clavate ; their form is regular, being 

 small at the base, and gradually and uniformly thickened towards the extremity, 

 which is either obtuse, rounded, or terminated by a bristle. This form is strikingly 

 exhibited in the genus Myrine, and in the second section of the genus TJiecla : see 

 PL ii, fig. 5, c. fig. 6, c. PI. iv, fig, 5, c. In the genera Lyccena and Polyommatus 

 the antennae are multiarticulate, filiform at the base and terminated by a cylindrical, 



compressed 



