MOKSEA. 25 



l. Morsea californica, Scudder. 



Morsea californica, Scudd. Psyche, viii. p. 179 (1898); Burr, Essai sur les EumastaGide&, p. 64 

 (1899). 



Ilab. United States, Cahon Pass, Southern California, and Mt. "Wilson, Altadina, 

 near Los Angeles, California (Morse).'] 



Subfam. TRYXALmJE*. 



This subfamily of short-horned grasshoppers or locusts is exceedingly well represented 

 in the region embraced between the United States and the Isthmus of Panama. In 

 studying the material that has been brought together for this purpose, along with such 

 literature as deals with other forms inhabiting the district, it is found that upwards 

 of forty genera and about one hundred species are to be considered. The study of 

 such a large number of forms permits the writer, in a measure at least, to revise some 

 of the recent work of others, since intermediate forms have been found which show 

 better the relationships and location of certain genera that heretofore seemed obscure 

 or uncertain. A few South-American genera have been found to occur within our 

 North-American faunal areas, while several entirely new ones are now added. 



Many of the forms characterized by Saussure and Walker were so inadequately 

 described that their recognition is rather uncertain. Especially is this true as regards 

 Walker's species belonging to genera like Orphulella and its allies, where the specific 

 differences are slight, and where the characters used to separate them differ from those 

 mentioned when they were first characterized. In Saussure's case, however, the 

 difficulty has been removed in a measure, since a number of the types are at hand 

 for comparison. 



* Principal works referred to for this subfamily : — 



Bruner, L., A Brief Account of the Genera and Species of Locusts or Grasshoppers of Argentina, together 



with Descriptions of new Forms, pp. 21-42 (1900). 

 Brttnner v. Wattenwyl, C, Bevision du Systeme des Orthopteres, pp. 117-123 (1893). 

 Giglio-Tos, E., Bollettino dei Musei di Zool. ed Anat. comp. di Torino, no. 184, vol. ix. (1894). 

 McNeill, Jerome, Bevision of the Truxalinae of North America (1897). 

 Saussttre, Henri de, Bev. et Mag. Zool. vol. xiii. (1861). 

 Sctjdder S. H., "A Preliminary Classification of the Tryxalinse of the United States and Canada," Psyche, 



vol. viii. pp. 231-239 (July, 1898). 

 Scudder, S. H., " Studies of N. A. Tryxalinse," Proc. Amer. Acad. Arts and Sciences, vol. xxxv. pp. 42-57 



(Aug. 1899). 

 Scudder, S. H., " The North-American Species of OrpJmlella" Canad. Ent. vol. xxxi. pp. 177-188 (1899). 

 Stal, C, Becensio Orthopt. i. pp. 87-94 (1873). 

 Stal, C, Observations Orthopterologiyues, ii. pp. 41-43 (1876). 

 Walker, Francis, Cat. Dermapt. Salt. Brit. Mus. iv. (1870). 



biol. centk.-amek., Orthopt., Vol. II., January 1902. Ee 



