23 



are homologous with the sting of the bee ; the cerci are con- 

 nected with gills. {Jan. 9, 1874-} 



Dr. a. S. Packakd, Jr., in making a communication, since 

 ])ublished by him in the American Naturalist, vol. viii [see 

 Psyche, vol. i, Rec, No. 266], said he had shown that the 

 spring of Isotoma is a pair of abdominal legs, homologous with 

 the bee's sting. As hexapod insects thus have (morphologi- 

 cally) abdominal feet, they are not to be separated from the 

 spiders. (Jan. 9, 1874-) 



§ 14. Mimicry. Referring to the distinction between 

 the epidermic and hypodermic colors of insects, which he had 

 pointed out in the American Naturalist, vol. vi, p. 388-3 93, Dr. 

 Hagen said that all colors which are concerned in mimicry are 

 hypodermic, these being the only colors which are under the 

 control of the insect. The markings upon the elytra of Cicin- 

 dela are hypodermic. (Mar. 13, 1874-) 



§ 15. Tachina parasitic on Phasmidae. Mr. C. R. 

 OsTEN Sacken mentioned that Mr. H. L. Moody had raised 

 two specimens of a Tachina from Dlafplieromera femorata, in 

 the abdomen of which they were parasitic, and said that Liebow 

 had found four or five larvse in the abdomen of Bacillus Mossii. 



(April 9, 1875.') 



§ 16. Is Alexia argillacea winter-killed every year ? 

 Mr. H. K. Morrison said he did not think it was true that 

 the imago of the Cotton-worm (Aletia argillacea') was killed 

 every winter by the cold, and that the loss was made up 

 annually by the immigration of other individuals from South 

 America. Dr. H. A. Hagen joined in expressing his dis- 

 belief of this supposition, and said that Mr. Boll had obtained 

 specimens in Texas. (May i^, 1875.) 



§ 17. Finding of Coleoptera. Mr. E. P. Austin said 

 he had captured specimens of Clivina elongata and of Oxytelus 

 7-ugosus at Cambridge commonly lately. (May l^-, 1875.) 



§ 18. Moulting of the Larva of Pleocoma. Mr. C. 

 R. Osten Sacken exhibited a larva of the coleopterous genus 

 Pleocoma, connnunicated to him by Dr. Leconte. The larva 

 had recently undergone moulting, some portions of the old 

 skin being still adherent about the head. The peculiarity no- 



