260 ENTOMOLOGICAL NEWS. [Oct., 'O2 



best condition, had been captured. P. charltonius has a power- 

 ful flight soaring well out of reach and not often settling 

 excepting on precipitous rocks. As any rapid progress was 

 impossible at such an elevation, owing not only to the rarefied 

 atmosphere, but also to the precipitous nature of the locality 

 frequented by the butterfly, where a slip would have proved 

 fatal, the object in view appeared almost unattainable. The 

 following day, however, by carefully observing the flight of 

 of the insects it was discovered how they were to be circum- 

 vented. The day was bright and the sun very powerful, but 

 at short intervals squalls of snow and hail occurred ; these 

 squalls were not 'at all appreciated by the butterflies, which 

 promptly sought refuge in the shelter of the rocks. By mark- 

 ing them down at the commencement of a storm they could be 

 successfully stalked if in an accessible position and brought to 

 net. In this manner a nice long series was procured in the 

 next day or two." We will be pleased to have collecting 

 experiences for publication in the NEWS. 



Entomological Literature. 



COMPILED BY H. L. VIERECK AND J. A. G. REHN. 



Under the above head it is intended to note papers received at the Academy of 

 Natural Sciences of Philadelphia pertaining to the Entomology of the Americas (North 

 and South). Articles irrelevant to American entomology, unless monographs, will not be 

 noted. Contributions to the anatomy, physiology and embryology of inserts, however, 

 whether relating to American or exotic species, will be recorded. The numbers in heavy- 

 faced type refer to the journals, as numbered in the following list, in which the papers 

 are published ; * denotes that the paper in question contains desciiptions of new North 

 American forms. The titles of all papers will be quoted in the original and not translated. 



1. Proceedings of the Academy of Natural Sciences of Philadelphia. 

 4. Canadian Entomologist, London, Ontario. 5. Psyche, Cambridge, 

 Mass. 7. United States Department of Agriculture, Division of Ento- 

 mology, Washington, D. C. 44. Verhandlungen der K. K. Zoologische 

 Botanische Gesellschaft, Wien. 45. Deutsche Entomologische Zeitsch- 

 rift, Berlin. 55. Le Naturaliste, Paris. 64. Annalen der K. K. Natur- 

 historischen Hof Museum, Wien. 68. Science, New York. 159. Allge- 

 meine Zeitschrift fiir Entomologie, Neudamm. 160. New Jersey Agricul- 

 tural Experiment Station, New Brunswick. 



GENERAL ENTOMOLOGY. Burman, W. A. Entomological Notes. The 

 Ottiwa Naturalist, xvi, No. 5, p. 109. Holmgren, N. Ueber du- Moipholo- 

 gische Bedeutung des Chitins bei den Insecten, Anatomisrher An/eiger, 



