( 62 ) 



shape of the skin when the pupa sits down again. Professor 

 Poulton said that he owed the translation of this observation 

 from the monograph of the distinguished Russian naturalist 

 to the late Professor W. R. Morfill, of Oxford. 



Dr. T. A. Chapman remarked that the hairs covering the 

 eggs of Porthetria dispar are also urticating. He also observed 

 that there are other species of moths which extrude the larval 

 skin, but in these cases it was from flimsy cocoons. Mr. J. H. 

 Durrant also gave instances of this fact. 



The warning colours of the Hypsid moth " Callioratis " 



PACTOUCUS, BUTL., IN ALL ITS STAGES. Professor PoULTON 



exhibited the larvae, pupae and imagines of pactolicus, sent 

 by Dr. G. D. H. < 'arpenter. Two species belonging to the genus 

 Callioratis had been recently recognised as Geometrirfae, and 

 had carried off the genus into this family, leaving the true 

 Hypsidae, pactolicus and its allies, at present without a generic 



[Ixxxiii 

 name. The 2 black-and-white-ringed larvae and the 2 orange 

 black-marked pupae has been collected on April 17, 1912, by 

 Dr. Carpenter on the shore of Bugalla, Sesse Islands: the M2 

 imagines had been bred (June 1, 1911) from scattered larvae 

 found on Damba Island. There was much variation in the 

 development <>f the black bars crossing the fore wing, which, 

 in the darkest specimen, were far more completely fused into 

 a angle band on the right side than the left. Dr. Carpenter 

 wrote concerning the specimens, A [nil 18, 1912: — 



" I am sending you bottled specimens of the Hypsid moth 

 'pactolicus' larvae and pupae. They are common on the 

 shore, where their yellow papilionaceous fond-plant grows very 

 plentifully. They are splendid examples of conspicuousness : 

 the larvae are visible from far. The white is the purest 

 Chinese white I have ever seen on a live creature ! The pupae 

 are freely exposed, hanging in a few threads just enough to 

 support them. It is difficult to imagine an insect more con- 

 spicuous in all its stages. The moth has a very slow, heavy 

 flight (like a "Cinnabar"), and if handled exudes a strong- 

 smelling, rather bitter-tasting fluid from behind each side of 

 ' the collar ' of the thorax. I thought you might like to have 

 these ; they are in dilute alcohol with a little glycerine. 1 



