68 THE ENTOMOLOCtIST's recokd. 



Figs. 13 and 14. — Two cases ? x about |. 



Fig. 15. — Male pupa x 3. The dorsal ridges are perhaps a little 

 exaggerated. 



Fig. 16. — Male pupa, abdominal segments 6. 7, b, 9, and 10, more 

 magnified to show the mounting of dorsal armature on 

 ridges. The reversed hooks of the intersegmental 

 membrane are hardly large enough to show e\en with 

 this magnification. The ridges end in a point instead 

 of fading out, as shown. 



Fig. 17. — Female pupa x 3. 



Fig. 18. — Skin cast by 2 larva on changing to pupa (from camera 

 sketch). The specimen is unusually perfect and satis- 

 factory, for one obtained in this way. The head is 

 crushed, and the ventral aspects of 8th, 9th, and 10th 

 abdominal segments are obscure, and there is a fold (on 

 each side unfortunately) which makes the lower lateral 

 plate of the 2nd thoracic doubtful ; for the rest, the 

 sketch gives all the tubercles of the larva, but to 

 make them at all visible, the \ery minute secondary 

 ones at anterior borders of segments and against 

 spiracles are a little exaggerated. 



Abnormal larva of Papilio alexanor. 



By H. POWELL. 



On July 12th last I found Papilio alexanor fairly abundant in the 

 upper valley of the Var river, particularly near Dalius, Alpes-Maritimes, 

 where it Hew rather wildly over the steep stony slopes of the right 

 bank. /'. alexanor is hard to take under the most favourable conditions, 

 but, in this district, an occasional stroke of the net as a specimen 

 crossed the road was the only chance one got. I had not much time 

 to spare and only managed to net three, all more or less the worse for 

 wear. 



It was not until August 19th that I had an opportunity to return 

 to Dalius, so I was not surprised to find that many larvse had already 

 left the plants of Seaeli iiiontanum. In a couple of hours, however, I 

 took thirteen larva? in various stages on this plant. They appear to 

 feed upon it exclusively, at any rate, in the Alpes-Maritimes. Four 

 of the younger larvse disappeared mysteriously from the breeding-cage 

 within a few days. As they could not have escaped from the cage I 

 suppose their elders ate them. The rest pupated normally before the 

 end of August, with one exception. I had noticed one very fine 

 specimen, and was expecting it to produce a large pupa, but, to my 

 surprise, something very different happened. 



On August 22nd this larva was resting on a stem after the fashion 

 of those about to moult, but, as it was in the 5th stage, and quite 

 fuUfed, I supposed it would soon commence preparations for pupating. 

 The next morning ic was still in the same position, and I was aston- 

 ished to see that it had developed a " stilt' neck," its head being 

 pushed forward and downward by a new head forming under the skin. 

 More than this, it had not shrunk, neither had it spun a thread round 

 the body, as would have been the case if a pupa had been forming. 



I watched this larva very closely, and on the morning of August 



