ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 527 



Metamorphoses of Saturnian Moths. • — A. S. Packard 7 gives de- 

 scriptions of the larval stages of a number of genera of Saturn iidse, 

 some of which are most highly specialised, while [ others are more 

 primitive. It is a matter of some interest to have' [worked ont the 

 transformations of Callosamia calleta, an annectant form between Callo- 

 samia and Philosamia. The early stages of the speciesEof Rothschildia, 

 which represent in the New World the Asiatic Attacus, have now been 

 discovered after several years of effort to secure the cocoons and eggs. 

 The knowledge gained appears to be of phylogenetic significance. 



Imaginal Adipose Tissue in Muscidee.f — Ch. Perez has made a 

 study of this tissue, which consists of two kinds of elements — tropho- 

 cytes and cenocytes. Their history shows that they are not due to old 

 migratory elements nor to muscle-nuclei, but that, like*other imaginal 

 organs, they arise from independent and from the first specialised 

 primordia. 



Case of Dimorphism in Cecidomyidae.J — J. Kunstler and J. Chaine 

 find in Kiefferia musce, a new Cecidomyid, a good case lot" dimorphism, 

 which is rare in dipterous insects. The peculiar forml described has 

 miniature wings with modified venation, and its head and abdomen are 

 larger than the same parts in those which form the majority of the 

 species. Dimorphism in Cecidomyids has been previously reported in 

 Monardia v an-der-Wulfsi and M. dimorphagyna, to_ which Kiefferia is 

 allied. 



First Abdominal Appendage in the Meal-Worm. § — Maurice de 

 Selys Longchamps has made a detailed study of the development of 

 the appendage of the first abdominal segment in Tenebriol molitor. 

 There is no doubt that it is an appendage homologous with those of 

 the thorax and head. Apart from the existence of a ccelomic cavity, 

 jointing, a trachea, and so on, the structure of the organ iwhen fully 

 developed is obviously appendicular. The distal part suffers peculiar 

 modification in reference to its special glandular function. The author 

 bases on actual observations an interesting general discussion of the 

 abdominal appendages in insects, and the degrees of their ontogenetic 

 suppression. 



Monograph of Genus Saperda.|] — E. P. Felt and L. J. Joutel con- 

 tribute a beautifully illustrated monograph of this genus of tree-boring 

 beetles. They discuss the genus as established by Fabricius, the sub- 

 generic grouping, the distribution and relationships of the species, and 

 the food-habits of the larvae. 



New British Spring-Tails. f—G. H. Carpenter and W. Evans re- 

 corded in 1899 seventeen species of Collembola and Thysanura new k 



* Proc. Araer. Acad,, xxxix. (1904) pp. 547-78. 



t Proc. Verb. Soc. Sci. Bordeaux, 1903, pp. 110-1. J Tom. cit., pp. 13-4. ' 



§ Bull. Classe Sci. Acad. Boy. Belg., No. 4 (1904) pp. 413-47 (1 pi.). 

 i| Bull. 74 New York State Museum (Entomology). Albany, 1904, pp. 1-6S 

 (14 pis. and 20 figs.). ' 



f Proc. Koy. Phys. Soc. Edinburgh, xv. (1902-1904) pp. 215-20 (1 pi.). 



