296 Dr. T. A. Chapman on What the 



the full-grown larva. It may also be noticed that the hair 

 bases are very commonly surrounded by an area free from 

 obvious skin-points, making each look like the centre of a 

 circle. 



The small size of the head for so large a larva is almost 

 ridiculous, notwithstanding that the larva is not full grown. 



The honey-gland, so conspicuous in the autumn larva, 

 owing to its comparatively large size, remains of the same 

 size, and looks extremely small (as compared with other 

 Plebeiid larvae) owing to the expansion of the rest of the 

 larva. One is inclined to regard it as still functional, the 

 four circles seen at the bottom of the hollow being very 

 distinct. Possibly, however, these would look just the 

 same if the function were in abeyance, although they are 

 certainly a feature of all functional honey-glands I have 

 examined. 



That arion is carnivorous in its last larval instar, not 

 only gives us a Lycaenid of this character in the European 

 fauna, which we were before without, though other quarters 

 of the globe possess them, but also gives the very remark- 

 able habit of the food being vegetable in the early stages, 

 animal afterwards. I need not dilate on the other curious 

 points in the life-history, but must note that the other 

 European Lycaenines, its nearest relatives, meJanops, 

 cyllarus, euphemus, areas and alcon, appear to have more 

 or less ordinary Lycaenid habits. 



The photographs presented are by Mr. A. E. Tonge. 



They show — ■ 



1st. The skin of the larva found May 14, 1915 (injured 

 in capture) X 7. It shows the difficulty of clearing away 

 the dirt, that was one reason why the preparations from 

 the larva given me by Mr. Rayward were not too satis- 

 factory. It suggests that the larva did not pass its life in 

 chambers and galleries of the ant, but amongst loose earth, 

 etc. The comparatively small size of the head may be 

 remarked as well as of the honey-gland ; these are perhaps 

 more noticeable in — 



2nd. Portion of front of larva and of honey-gland region 

 X 25. These three photographs may be compared wath 

 those I gave in Tutt's " Brit. Lep.," making proper allow- 

 ance for different magnifications. 



3rd. Portion of contents of alimentary canal forward of 

 black mass, showing mandibles and hairs of ant larvae 

 X 55. The preparation is not one that lends itself well to 



