iThe Glow-Worm and Other Beetles 



provided with highly perfected organs for 

 performing its perilous journeys? 



Lastly, we count nine pairs of stigmata : 

 one pair on the mesothorax and the rest on 

 the first eight segments of the abdomen. 

 The last pair, that on the eighth abdominal 

 segment, consists of stigmata so small that 

 to detect them we have to gather their posi- 

 tion by that in the succeeding states of the 

 larva and to pass a very patient magnifying- 

 glass along the direction of the other pairs. 

 These are as yet but vestigial stigmata. The 

 others are fairly large, with pale, round, flat 

 edges. 



If in its first form the Sitaris-larva is or- 

 ganized for action, to obtain possession of 

 the coveted cell, in its second form it is or- 

 ganized solely to digest the provisions ac- 

 quired. Let us take a glance at its internal 

 structure and in particular at its digestive 

 apparatus. Here is a strange thing: this 

 apparatus, in which the hoard of honey 

 amassed by the Anthophora is to be engulfed, 

 is similar in every respect to that of the adult 

 Sitaris, who possibly never takes food. We 

 find in both the same very short oesophagus, 

 the same chylific ventricle, empty in the per- 

 fect insect, distended in the larva with an 

 abundant orange-coloured pulp; in both the 

 114 



