152 ENTOMOLOGICAL NEWS. [June, 



Glenwood Springs, Garfield County, Colorado, where dionysius is abun- 

 dant is just the same elevation as Denver with this difference: Denver is 

 a gradual elevation of the plains, while Glenwood is a depression in the 

 mountains worn by the rapid rivers. Ridingsii is found in the short 

 grass, dionysius on sandy and stony desert tracts, always sitting on the 

 hot sand of the trails, and, when started, flying on the bare rocks either 

 down to the riverside or the side of the cliffs above for a few minutes, 

 then back to the hot dusty tracts. Both species occur at Salida, their 

 habits and habitat still keeping distinct. This place is over seven thou- 

 sand feet in altitude. Here I have taken dionysius in a volcanic patch, 

 barren and desolate, and ridingsii on the grassy meadow watered by the 

 little Arkansas River. DAVID BRUCE. 



" INSECT GRAFTING. A discovery which may lead to important re- 

 sults has been made by Mr. Henry E. Crampton, Instructor in Biology in 

 Columbia University. Mr. Crampton has been studying the works of a 

 German scientist named Born, and has made a practical test of some of 

 his theories, with extraordinary results. He has experimented on the 

 embryo of the butterfly at the period of its existence when it lies inactive 

 in its cocoon, after its life as a caterpillar. Every one has seen the grub 

 spinning its delicate nest on a leaf or twig, and entering it, as into a grave, 

 remaining there eating nothing and apparently dead for a few weeks, and 

 then emerging from it a beautiful creature with wings. Mr. Crampton 

 collected a number of these cocoons and operated on their insensible 

 occupants. He found that he could cut the comatose creatures in half 

 and join the half of one to the half of another without affecting the life 

 of either. The chrysalids so joined accomplished the usual period of 

 their retirement and emerged from it as two butterflies, with wonderful 

 combinations of colors and organisms, apparently none the worse for the 

 operation which had been performed. Prof. Smith, of the New Jersey 

 Experiment Station, who has made the facts of Mr. Crampton's work 

 known, believes that the discovery will constitute an era in biological 

 science. The principle has an endless variety in possible forms of appli- 

 cation and may eventually reach to higher orders of life. The possibility 

 of continuing two natures in a single living organism being once demon- 

 strated, scientists will perceive how far-reaching may be the effects of 

 such experiments."- Christian Herald. 



Entomological Literature. 



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

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

 and South). Articles irrelevant to American entomology, unless monographs, or con- 

 taining descriptions of new genera, will not be noted. Contributions to the anatomy, 

 physiology and embryology ot insects, 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 descriptions of new North American forms. Titles of all arti- 

 cles in foreign languages are translated into English; usually such articles are written in 

 the same language as the title of the journal containing them, but when such articles are 

 in other languages than English, French, German or Italian, this tact is indicated in 

 parenthesis. 



4. The Canadian Entomologist, London, Ont., May, '98. 5. Psyche, 

 Cambridge, Mass., May, '98. 8. The Entomologist's Monthly Magazine, 

 London, May, '98. 9. The Entomologist, London, May, '98. 14. Pro- 



