BUTTERFLIES. 159 



quite unknown north-west of the Lower Moselle ; though it is met 

 with in Eastern Germany as well as in Norway and Sweden. Ex- 

 traordinary captures may sometimes be accounted for in the manner 

 suggested ; but it by no means follows that the entomologist who 

 captures an insect brought over and set at liberty is the same person 

 who brought it over. Many insects are introduced into England with 

 shipping, chiefly from the continent of Europe, and from North 

 America; but a mountain species like P. Apollo could scarcely 

 reach a locality like Dover unless purposely introduced. 



Euryades Corethrus, Boisd., is a handsome black species, with 

 yellow and red markings, which inhabits Uruguay and the adjacent 

 countries ; it is still rare in collections. 



Thais, Fabr., is a genus of rather small butterflies, with den- 

 tated wings, which are met with on the shores of the Mediter- 

 ranean. They are yellowish white, with black and red spots, and 

 festooned markings. 



Sericinus, "Westw., is met with in North China, and derives its 

 name from the silky white colour of the males ; in the females the 

 wings are heavily banded with brown. Towards the anal angle 

 of the hind wings is a red streak on a black ground, marked below 

 with blue. The hind wings are furnished with a long tail ; but 

 the antennae are so much shorter in Sericinus than in Papilio that 

 the two genera cannot possibly be confounded. 



Tewopalpus Imperialis, Hope, is one of the finest North Indian 

 species of this family. It is spangled with golden-green, varied 

 above with pale lilac, and below with black and bright yellow. The 

 male is smaller, more uniform in colour, and has only one tail on 

 the hind wings, instead of three. 



Ornithoptera, Boisd., though hardly sufficiently distinct from 

 Papilio, is a group which includes a series of very large species, 

 peculiar to the Eastern Islands. The males are of a velvety black, 

 with a broad green band along the costa, and another along the 

 hind margin; the hind wings are green, with a row of black 

 submarginal spots. The females are large brown butterflies, with 

 white spots and markings. In some species, the green of the 

 males is replaced with blue (as in 0. Urvilliana, Boisd.), or rich 

 orange (as in 0. Croesus, Wall.). These butterflies are found in the 

 Eastern Archipelago ; but there is another section which extends 

 to the Indian Peninsula and Ceylon, which is black, with the hind 

 wings more or less yellow. The finest of the yellow species is 

 0. Magellanus, Feld., from the Philippines, in which the yellow 



