78 CATACLYSTA LEMNATA. 



plate on the second segment is relieved behind by a 

 pale margin of olive-greenish ; from thence the whole 

 surface of the body is of a deep sooty olive blackness, 

 soft and velvety, with the slight exception of the anal 

 tip being a little browner than the rest, and rather 

 less velvety ; a black dorsal stripe can just be dis- 

 cerned ; the anterior legs are pale olive ; the puffed 

 spiracular region is a little puckered, and the small 

 circular blackish spiracles raised in the least degree 

 above the surrounding surface, and slightly glistening; 

 a few fine soft hairs from the usual situations are just 

 visible. 



As before, this larva, when supplied with a little 

 duckweed, soon formed for itself a new case ; on 

 examining the case of the other survivor I found it 

 had already become a pupa; I put them in the same 

 vessel together, and on the 15th of May I found the 

 larva was joining its case to that which contained the 

 pupa, thus making together a much bigger object 

 floating on the water ; at intervals more weed was 

 added by the larva until the 17th, when it became 

 quiescent, and then the whole mass presented an oval 

 form of about the bulk of a house-sparrow's egg. 



Not expecting an imago quite so early, 1 left the 

 water uncovered until the 26th of May, when I noticed 

 a diminution in size of the case, and knew I had lost 

 the first moth ; but I secured the second moth, a fine 

 female specimen which appeared on the 5th of June. 



On opening the deserted remains of the cases I 

 found that of the first moth fallen to decay, while the 

 one just vacated was oval within, five-eighths of an inch 

 in length, thickly and smoothly lined with whitish 

 silk, the old blackish cast skin of the larva and the 

 broken pupa-skin remaining in it; this pupa-skin was 

 a little more than three-eighths of an inch in length, 

 with a large development of the wing-, antenna-, and 

 leg-cases, the last projecting a little free from the 

 body, which was smooth and shining, the head and 

 thorax rounded off, the abdominal tip rather blunt, 



