36 ORTHOPTEKA. 



Acridium ensicornum, De Geer, Mem. Ins. p. 449, t. 42. figg. 1, 2 (1773) 14 ; Goeze, in De Geer's 



Gesch. Ihs. iii. p. 325, t. 42. fig. 7 (1780) 15 . 

 Opsomala punctipennis, Serv. Hist. Nat. Ins. Orthopt. p. 590 (1838) 16 ; Thomas, Trans. State 



Agr. Soc. Illinois, p. 447 (1865) 17 . 

 Opomala punctipennis, Thomas, Syn. Acrid. N. Amer. p. 197 (1873) 18 . 

 Pyrgomorpha punctipennis , Thomas, Syn. Acrid. N. Amer. p. 68 (1873) 19 . 

 Truxalis notochlora, Pal. de Beauv. Ins. Afr. et Amer. p. 80, t. 3. fig. 3 (1807) 20 . 

 Metaleptea (Tryxalis) notochloris, Bruner, Bull. Lab. Nat. Hist. Univ. Iowa, iii. t. 3. fig. 63 



(1895) 21 . 

 Truxalis viridula, Pal. de Beauv. Ins. Afr. et Amer. p. 81, t. 3. fig. 4 (1807) 22 . 

 Truxalis adspersa, Blanch. Voyage dans TAmer. Merid. vi. 2, p. 216, t. 27. fig. 2 (1837-1843) 23 . 

 Oxycoryphus burkhartianus, Sauss. Rev. et Mag. Zool. 1861, p. 315 24 ; Walk. Cat. Dermapt. Salt. 



Brit. Mus. iv. p. 7S6 (1870) 25 ; Thomas, Syn. Acrid. N. Amer. p. 202 (1873) 2G . 



Ilab. North America, United States 1416 . — Mexico 24 , Minas Viejas (Dr. Palmer, 

 coll. Scudder), Orizaba (II. H. Smith, Godman), Atoyac, Teapa (//. H. Smith), Jalapa 

 and San Kafael in Vera Cruz (Barrett & Townsend, in coll. Bruner) ; Nicaragua 

 (Shimek, coll. Bruner), Chontales (coll. Scudder); Costa Rica, Cache (Rogers), Puerto 

 Limon (Crawford & Carriker, coll. Bruner). — Colombia; British Guiana ; Brazil; 

 Paraguay ; Argentina ; Antilles, San Domingo 20 22 . 



Besides these records, there are numerous others which indicate that the insect is 

 well distributed over the various countries of both North and South America lying 

 between the latitudes of 40° on either side of the Equator, but more especially 

 eastward. 



There are many specimens of it in my own collection and in that of the Carnegie 

 Museum at Pittsburg. The type of 0. burkhartianus, Sauss., is before me as I write, 

 and it simply bears the label " Mexique." 



[ACANTHERUS, Scudder. 

 Acantherus, Scudder, Proc. Dav. Acad. Nat. Sci. ix. pp. 22, 23 (1902). 



Since the synopsis of genera (antea, pp. 26-34) was prepared, an additional genus 

 belonging to the Tryxalinse has come to light. It was described by Samuel H. Scudder 

 in a treatise on " New Mexican Orthoptera." As the insect upon which it is based 

 occurs in a region quite close to the southern boundary of New Mexico, where many 

 other Mexican locusts are found, it seems best to include it here. Scudder's descriptions 

 of both genus and species are given below *.] 



* ACANTHERUS, Scudder. 



" Body rather elongate, compressed. Head shorter than the pronotum, a little protuberant, feebly ascending, 

 broader below than above, apically blunt ; vertex nearly plane, the fastigium brief, roundly subtriangular, 

 projecting less than its width beyond the eyes, without distinct median carina ; eyes moderate, elongate- 

 elliptical, subvertical, slightly less oblique than the face ; frontal costa very narrow, rather prominent, 



