176 



ME. D. SHAEP ON THE RESPIRATORY 



Rose at : — 

 9.18 aud remained up 15 seconds. 

 9-35 „ „ 75 „ 



9-40 „ „ 25 „ 



9-43 „ „ 2 mins. 



(breathing doubtful.) 

 9,47 and remained up 15 seconds. 

 9-52 „ „ 3 „ 



9.55 „ „ 30 „ 



9.56 and remained up 20 sees. 



9.57 „ „ 10?,, 

 9.o9 ,, „ o „ 



10. at surface. 



10. 2 „ 8 seconds. 



10. 4 at surface. 



10. 5 at surface. 



10. 7 observation ceased. 



This individual appeared all day to be uncomfortable : it was 

 restless and active, and kept straining the apical segments of its hind 

 bod}', and discharging bubbles of gas. It was probably desirous 

 of ovipositing ; and I have therefore not compared its activity 

 with that of the other species. 



XII. Iltbius fuligikosus. * 



No. 1. Aug. 22nd, 1875. — Began observing at noon ; up at 

 12.11. 



Again at 12. 2| ; then was eating piece of a worm at 12.4. 



12.6 remained up 30 seconds. 



12.8 came up to surface with a piece of a worm, and remained at , 

 the surface eating for about 2 minutes. 



12.12 remained up for 25 seconds, eating after descent. 



*12.14|, remained up for 18 sees. 

 *12.15i „ 



12.19 



12.22i „ 



12.25 



12.281 „ 



*19 J?91 



12.36 remained up for 38 sees. 

 „ 10 „ 

 „ 20 „ 

 » )) 33 „ 



» >j 35 „ 



•1 1. 30 ,, 



At 12.50| it brought up a piece of a worm to the surface, there 

 remaining, eating it and breathing for 7| minutes. The Ili/hius 

 again rose at 12.60 and stayed up for 20 seconds. I left off 

 watching at 1.1 p.m. On descending after the hours marked with 

 an asterisk (*),the insect began eating its food. It was observed 

 tliat after eating, the specimen only readied the surface with 

 difficulty to breathe, it being probable that the space containing 

 air was diraiuislied by the distended alimentary canal, the quan- 

 rity of worm eaten being large ; bubbles of gas were frequently 



