58 



seedlings before mentioned were placed at nighttimes. It was 

 in such a position that the young larvae might drop onto the 

 cane seedlings below, as it is their habit on hatching to drop to 

 the ground by a silken thread. This probably accounts for the 

 cane seedlings having been infested, as the small caterpillars 

 were scattered quite generally amongst the propogating boxes; 

 whereas, if a cluster of eggs had been deposited on any one box, 

 the larvae would not for some time have been likely to get to 

 other boxes, but would all have attacked the cane plants in that 

 one box. 



When larvae are a few days old, they constmie the entire 

 substance of the leaf, not leaving the epidermis as they did at 

 first. They obtained their growth in about twenty -one days, 

 and were about 35 mm. long. From being green at 

 first, in successive molts, they became darker, often almost 

 entirely black They entered the ground to pupate. The pupa 

 is similar to that of 5. exigua, but slightly larger, and the spiracles 

 a little more raised. The pupal period is eleven to fourteen days. 



Dyar has described all of the preparatory stages of this moth 

 (Can. Ent. XXVI, p. 65, 1894) under the name Laphygma 

 ■flavimaculata. A correction of the name is made in Can. Ent. 

 XXXII, p. 156, 1900. This is a very complete description, but 

 the spiracles of the caterpillar are black, instead of white as he 

 describes them. He has evidently mistaken for spiracles a row 

 of white dots behind and a little above the spiracles on segments 

 5 to 12. 



Mr. F. W. Terry discussed the "Increase of the Antennal 

 Segments in the Forficulids Chelisoches morio (Fabricius) and 

 Forficula auricularia Linnaeus," and exhibited specimens. 



Whilst studying the life-history of Chelisoches morio'^, 1 made 

 some observations on the numerical increase of the antennal 

 segments. It was found that there was a definite increment at 

 each ecdysis, the extra segments always appearing to arise from 

 subdivisions of the third segment. Since the publication of 

 these observations, my attention has been called to a paper by 

 Meinertf on the life-history of Forficula auricularia. This 

 author appears somewhat vague in his observations; he states 



* Bull. Hawaiian Plant. Ent. 165-6 1905. 



t Naturh. Tidsskr. (3) II, 427-82 PI. IX (1864). 



