INTRODUCTION. 41 



for further subdivisions or subgenera. The modification of larva which follows in 

 the series next to the typical group, presents a smooth surface, from which short, 

 naked, fleshy, obtuse tubercles arise ; as we proceed in the series towards the 

 boundary of the Chilopodiform stirps, we find the tubercles increasing in length 

 and produced to a point ; the form first mentioned is exhibited in the third plate, 

 fig. 17, and 17, a, and in the fourth plate, fig. 13, and 13, a ; and it passes by 

 very slow gradations to the second form, which in its larva state still preserves, 

 in a great measure, the character of the Juliform larva, from which it is often 

 distinguished with difficulty ; but if we refer to the pupa and to the perfect insect, 

 we find unequivocal indications of the next stirps. The subjects belonging to it 

 afford, according to the comparisons which I have made, a very natural transition, 

 which will be discussed at large in considering the Chilopodomorphous stirps. I 

 shall, therefore, merely state, that it consists of the genera Euplcea and Heliconia .- 

 to show this I refer to the illustrations which I have attempted in the regular series 

 of larvas on the fourth plate, and in the diagram, preparatory to a future analysis, 

 on the third plate. I shall, on the present occasion, point out the facts, and 

 leave the inferences to the reader. The larva of Eaplcea is represented only on 

 the third plate, in figures 6, 7> 8, 9, 10 ; it is placed here in order to admit of 

 a ready comparison with fig. 13 of plate iv, and fig. 17 of plate iii, belonging to 

 the genus Papilio, and with figures 18, 19, 20, in the diagram. The latter belong to 

 the genus Heliconia, and as I have not observed this family in Java, I have borrowed 

 the illustration of the larvas from the continuation of Cramer, by Stoll, where they 

 are found on the first plate in figures 4, 5, 6; fig. 4 being Heliconia Euterpe, fig. 18 

 of our diagram, fig. 5, Heliconia Amphione, fig. 19 of our diagram, and fig. 6. 

 Heliconia Thalia, fig. 20 of the diagram. 



I may, on this occasion, point out to the reader an analogical resemblance, which, 

 if correct, confirms the disposition of Heliconia in this part of the Lepidopterous 

 circle ; it regards the larva immediately following the true Papilionidae in fig. 18 of 

 the diagram ; this appears to be analogous in habit to the genus Craspedosoma among 

 the Ametabola, which genus stands between the Chilognatha and Chilopoda. (See 

 Horae Entom., p. 351). The Heliconia; form an extensive group which, perhaps, is 

 exclusively confined to the equinoctial parts of the New World ; it is, in some mea- 

 sure, represented in India by Euplcea and Idea. The dissections of Heliconia, plate 

 iii, fig. 29, a, b, c, d ; of Euplcea, pi. iii, fig. 27, a, b, c, d ; of Idea, pi. iii> 

 fig. 28, a, b, c, d ; and of Acrcea, pi. iii, fig. 30, a, b, c, d ; which latter, accord- 

 ing to the form of the larva (fig. 21, pi. iii), is decidedly chilopodomorphous, afford 

 a further illustration, and, I trust, a confirmation of this statement. 



One remarkable character of the larva of this stirps remains to be mentioned, 

 which affords an additional indication of the analogy to the Chilognatha among 



g the 



