Vol. XXX] ExXTOMOIvOGICAL NEWS. II5 



Capture of Ants by Gummy Exudations (Hym.). 



A number of years ago I observed that certain ants (Myniiica hrcii- 

 nodis) were attracted by the gjmmy exudations of broken sunflower 

 stems and, attempting to eat the sticky juice, were snared and finally 

 perished. A specimen showing this was figured and discussed by 

 Wheeler in Bull. Amer. Mus. Nat. Hist., XXII, p. 417. I then sur- 

 mised that the ants being essentially boreal and the sunflowers austral, 

 there was maladjustment where the ranges overlapped, owing to the 

 relatively short time since the organisms occupied the same area. 

 Dr. Wheeler was skeptical, and a new case which has just come to 

 hand can hardly be explained in the manner suggested, since both 

 types concerned are characteristic of the arid plains. Mr. E. Bethel 

 sends a specimen of the plant Lyyodcsviia juncca, collected at Denver, 

 on which are several workers of Pogonomynncx occidentaJis, with 

 their mandibles firmly fixed in the yellow gum. The gum exudes 

 freely from the plants and the ants are caught and die, quite unable 

 to escape. Mr. Bethel assures me that many ants are killed in this 

 way. — T. D. A. Cockerell, Boulder, Colorado. 



Entomological Literatuire. 



COMPILED BY E. T. CRESSON. JR., AND J. A. G. REHN. 



Under the above head it is intended to note pai'ers received at ihe 

 Academy of Natural Sciences, of Philadelphia, pertaining to the En- 

 tomology of the Americas (North and South), including Arachnida and 

 Myriopoda. Articles irrelevant to American entomology will not be noted; 

 but contributions to anatomy, physiology and embryology of insects, how- 

 ever, 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. 



All continued papers, with few exceptions, are recorded only at their 

 first installments. 



The records of papers containing new species are all grouped at the 

 end of each Order of which they treat. Unless mentioned in the title, 

 the number of the new species occurring north of Mexico is given at 

 end of title, within brackets. 



For records Qf Economic Literature, see the Experiment Station Record. 

 Office of Experiment Stations, Washington. Also Review of Applied En- 

 tomology, Series A, London. For records of papers on Medical Ento- 

 mology, see Review of Applied Entomology, Series B. 



4 — Canadian Entomologist. London, Can. 6 — Journal of the 

 New York Entomological Society. 8 — The Entomologist's Month- 

 ly Magazine, London. 9 — The Entomologist, London. 10 — Pro- 

 ceedings of the Entomological Society of Washington, D. C. 11 — 

 Annals and Magazine of Natural History, London. 12 — Journal 

 of Economic Entomology, Concord, N. H. 17 — Lepidoptera, Bos- 

 ton, Mass. 19 — Bulletin of the Brooklyn Entomological Society. 

 23 — Bolletino del Laboratorio di Zoologia Generale e Agraria, 

 Portici, Italy. 54 — Proceedings of the Biological Society of Wash- 

 ington, D. C. 68 — Science, Lancaster, Pa. 69 — Comptes Rendus, 

 des Seances de I'Academie des Sciences, Paris. 79 — Bulletin of 



