75 



in the damp boxes remained quite free. The eggs were distinctly 

 and continuously luminous. Just before they hatcned the segments 

 of the young larvje could be seen through the transparent egg-shells. 

 Laid during the third week of July the eggs commenced to hatch on 

 August 2Sih. 



The newly emerged larvce (PI. VIII, tig. 2) were quite light in 

 colour, but within twenty-four hours they assumed the usual dark 

 tint which they retain through their larval existence. The little 

 creatures fed readily on slugs and snails and grew rather quickly 

 at first, but after October they ceased to feed. They were kept in a 

 cold room, and have remained pretty stationary till the present time, 

 January, 191 1. 



At the same time that the ova hatched, a larva, apparently full 

 grown, was found under a stone at Lewes. 'I'his larva continued 

 feeding until November, when it became quite sluggish and has 

 remained so till the present time. 



In April, 19 10, another larva was found, also apparently full 

 grown. It fed readily on snails and slugs. From contact with 

 these it frequently got soiled with mucus, and gave one a good 

 opportunity for observing how it cleaned itself. The segments of 

 the abdomen are very flexible. From the hinder end is protruded a 

 whitish organ consisting of a number of slender filaments. These 

 spread out when applied to any part of the body, forming a brush, 

 which is drawn over any portion of the integument and removes the 

 mucus. The head was usually kept retracted as seen in PI. VIII, 

 fig. 3, unless the insect was feeding. About INIay 20th the larva, 

 instead of resting in its usual position, lay on its side, partly curled 

 up (PI. VIII. fig. 4). 



On M;iy 23rd the pupa was disclosed, and was then seen to be 

 that of a male (PL VIII, fig. 5). It rested in a position corre- 

 sponding to that of the larva awaiting pupation, and displayed little 

 or no activity. liven when turned on its back to examine its ventral 

 surface (PI. VIII, fig. 6) it exhibited no resentment. The pupa was 

 quite light in colour at first, but gradually darkened, ^\'hen the 

 larva was lying on its side it showed a distinctly luminous area 

 corresponding roughly in position to that in the female, but smaller 

 in extent. The pupa displayed a similar luminous area. The light 

 was not constant, but at times was quite brilliant, or, again, was 

 quite extinguished. The emergence of the pupa was not observed, 

 i'he empty larval skin, however (PL VIII, fig. 7) shows that it does not 

 take place through a split down the dorsal median line, as in many 

 other beetles, but by means oflateral splits in the thoracic region. 



Early on the morning of June 6th the beetle was found newly 

 emerged from the pupa. The abdomen was longer than the elytra, 

 and the wings were not properly folded away (PL VIII, fig. 8). 

 When again seen in the evening it had become mature. It was very 

 restless, so after vain attempts to photograph it alive it was sacrificed 

 for the purpose of obtaining the tigures (PL VII, figs. 3 to 6). 



