40 ENTOMOLOGICAL NEWS. [p-ebruary, 



the fact that the food is "bolted," and therefore an accessory organ for 

 its comminution is required. The orthopterous Locustidae and Gryllid^ 

 likewise possess a gizzard, whose presence is sirriilarly accounted for, 

 while in the more slowly feeding Acrididae and Lepidopterous larvae it is 

 lacking. Confining his studies to the Odonata he finds that, for the larvae, 

 the Calopteryginae and some Agrioninse have the most complexly armed 

 gizzard, the teeth being arranged in (6 longitudinal fields, reduced to 8 

 in I^estes, to 4 in Goniphiis and Aeschna, and to four bilaterally symmet- 

 rical teeth in Cordulegasier ?Lnd the Libellulidae. A comparison of larvae 

 and imagos of the same species shows that a reduction likewise takes 

 place in the individual development, scarcely more than traces of the 

 teeth remaining in the imagos of the Anisoptera. He discusses the phy- 

 logeny of the various subfamilies of the Odonata, and on data, drawn in 

 part from his above-described results, modifies Calvert's geneological 

 tree by placing the Cordulegasterinae as the ancestors of the CorduHnae 

 and Libellulinae. 



Identification of Insects Umagos) for Subscribers. 



Specimens will be named under the following conditions: ist, The number of species 

 to be limited to twenty-five for each sending; 2d, The sender to pay all expenses of trans- 

 portation and the insects to become the property of the American Entomological Society ; 

 3d, Each specimen must have a number attached so that the identification may be an- 

 nounced accordingly. Exotic species named only by special arrangement with the Editor, 

 who should be consulted before specimens are sent. Send a 2 cent stamp with all insects 

 for return of names. Please put date cf capture and exact locality on each specimen. 

 Before sending insects for identificaticn, read page 41, Vol. Ill, Address all packages 

 to Entomological News, Academy Natural Sciences, Logan Square, Philadelphia, Pa. 



Entomological LiteratU-re. 



Under the above head it is intended to note such 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, or con- 

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

 insects, however, whether relating to American or exotic species will be recorded. 



1. Annales du Musee Royal d'Histoire Naturelle de Belgique. 

 Tome xii. — Les Arachnides de Belgique par Leon Becker. Deuxieme 

 et Troisiemes parties. Eresidje, Epeiridae, Uloboridae, Theridionidae,. 

 Pholcidae, Enyoidae, Agelenidae, Dictynidae, Drassidae, Scytodidae, Dys- 

 deridae, Avicularidae.— Chernetes, Opiliones. Brussels, MDCCCXCVI, 

 folio, 378 pp. With an atlas (folio) of 43 colored plates. 



2. Zoologischer Anzeiger. Leipsic, Dec. 7, 1896. — Some further 

 remarks on the phylogeny of the orders of Myriapods, C. Verlioeff. On 

 the development of the Pseudoscorpions, J. Tschelkanovzev (in the Mit- 



theilungen). December 28.— On the mode of breathing in the Hy- 



drachnidae, A. H. van Vleet, fig. Aphidological communications, N. 

 Cholodkovsky. 



