148 



PSYCHE. 



[October 1S94. 



the tip of the pronotum or wings, as the 

 case may be. 



"Pronotum > hind femora" means 

 that the pronotum passes the end of 

 the hind femora ; if a quantity is pre- 

 ceded by a — sign, the pronotum fails 

 to pass by that amount. All state- 

 ments of a comparative character 

 should be understood as having refer- 

 ence to New England species only. 



BIBLIOGRAPHY. 



Unle.ss otherwise stated citations refer to 

 the following woiks : — 



BoLiv.\R, Ign. — Essai sur les Acridiens de la 

 tribu des Tettigidae, — in Ann. Soc. ent. 

 Belgique, x.xxi, 1887 (pp. 175-313)- 

 (^This can be obtained in separate form.) 



Fernald, C. H. — The Orthoptera of New 

 England, pp. 61 ; same, in 25th Report 

 Mass. agric. college (pp. 85-145), Jan. 

 18S8; same, in Report Sec. Board agric. 

 Mass., 1SS7 (pp. 421-481). The pagina- 

 tion of the separate is used. 



Harris, T. W. — A treatise on some of the 

 insects injurious to vegetation, 3rd ed., 

 1S62 (pp. 165-191). First ed. pub. 1841. 



Morse, A. P. — Wing-length in some New 

 England Acrididae, — in Psyche, 1894, 



PP- 13. 14. 53-55- 



A preliminary list of the Acrididae of 



New England, — in Psyclie, 1894, pp. 



102-10S. 



(Separates of these are obtainable.) 

 ScuDDER, S. H. — Materials for a monograph 



of the North American Orthoptera, 



including a Catalogue of the known New 



England species, — itt Boston journ. nat. 



hist., vol. vii, no. iii, 1862 (pp. 409-4S0) . 

 Thomas. Cyrus. — Synopsis of the Acrididae 



of North America. Rep't U. S. geol. 



surv. terr. (Hayden) vol. v. , pt. i , 1S73, — 



pp. X, 262. 



This group of locusts as found in 

 New England comprises eight forms 

 more or less distinct structurally and 

 presenting great diversity in color and 

 markings, — the latter are, however, of 

 so comparatively little systematic value 

 that I have not considered them in this 

 paper, but hope to do so at some future 

 time. The characters of most value in 

 distinguishing the forms are the number 

 of joints in the antennae, the form of 

 the vertex and profile of the head, and 

 of the pronotum, and the extent of tiie 

 pronotum and wings. 



The most recent work of a mono- 

 graphic character on this group is 

 Bolivar's "Essay," which was based on 

 the very large amount of material con- 

 tained in several of the jnost important 

 European collections. This excellent 

 work is invaluable to the student and 

 is likely to remain for some time the 

 standard reference. 



Bolivar divides the entire subfamily 

 into seven sections, according tt) form 

 of antennae, position of median ocellus, 

 form of anterior femora, forking of 

 frontal costa, form and direction of 

 posterior angles of lateral lobes of pro- 

 notum, number of antennal joints, and 

 relative length of proximal joints of 

 posterior tarsi. New England affords 

 representatives of but two of these — 

 Tettigiae and Batrachideae. 



To the Batrachideae belongs the 

 genus Tettigidea with two fonns — T. 

 lateralis and T. polymorpha^ while 

 the remaining genera fall into the 

 Tettigiae. These two sections may be 



