XLir 



that on this dark background provided by the vas dorsalis the dark pigment 

 had first formed. 



As some Lycaenidae-larvae live in the seed-pods of leguminous plants, so 

 a few live inside the fruit. Thus I found in Java the larva of Deudorix 

 Epiarbas Moore in the fruit of the ramboutan (Nephelium Lappaceum). This 

 larva did not at all look like a Lycaenidae-caterpillar, but very much resembled 

 a Heterocerum determined by Snellen as Leocyma Bateoides S. i. L. which 

 is common in the fruit of the douren (DuRio Zibethinus L.) and shown by me 

 on p. 4 fig. II, of the Tijdschrift voor Entomologie XI. It was claret-coloured, 

 like this, and therefore did not correspond to the picture given by Swinhoe of 

 this caterpillar and chrysalis ; neither did my caterpillar pupate within the fruit, 

 but outside, against the fruit that lay upon some earth or perhaps against a 

 lump of earth; I could not observe this quite accurately. 



A few words may also be devoted to the physical form of the Lycaenidae- 

 larvae. In many of them it is what has been called onisciform, more or less 

 resembling Oniscldea, but in others, as the larva of Deudorix and Jolaus 

 species it differs very widely from this. And Swinhoe gives illustrations of 

 other larvae of still different forms; but his illustrations are so defective as a 

 rule that it is difficult to judge of them. The strangest one that I found in 

 Java, seemed to me to be that of Deudorix Sphinx F. ; (PI. XXV, 129^0'). 

 I do not know if there are similar ones to be found amongst Lycaenidae living 

 elsewhere. Of this species I can give a very good drawing. It shows on 

 each joint a bunch of spikes sticking out on both sides, the same, in a less 

 developed condition, as are found in the Cocliopodae-larvae Thosea Loesa 

 Moore and Canea Bilenea Moore, an illustration of which I have given in 

 part XLIII of the Ti/dschri/i voor Entomologie plate 2, nos. i, 2 and 7. This 

 caterpillar, therefore, resembles the Cocliopodae-larvae. It appears that in the 

 evolutionary changing of several parts of the body, including such appendages 

 also, casual circumstances may guide the process in a particular direction, and 

 that when the circumstances are the same, however much the animals may 

 otherwise differ, they may lead to the occurrence to a certain extent of the 

 same morphological forms. Such lateral prickles are found for instance very 

 much developed amongst the Nymphalidae-larvae of the genus Adolias, and 

 some related genera, but only in these genera, although the development of 

 these thorny appendages in them is apparently the same as in many other 

 Nymphalidae-genera in which however they take all manner of other forms, 

 not lateral. 



As regards the pupae of the Lycaenidae I must discard the idea that 

 some of them produce sounds, as has lately been stated again in articles in 



