ACHURUM.— TEUXALIS. o5 



Hab. Noeth America, Fort Grant, Arizona (coll. Bruner : d 2 )• — Mexico 12 , Chil- 

 pancingo and Amula in Guerrero (H H. Smith: 6 $ ), Guadalajara (Schumann: $ ), 

 Vera Cruz (Salle, in coll. Scudder -. 6 ), Orizaba. 



Saussure's type is a male. 



2. Achurum acridodes, Stal. 



Truxalis acridodes, Stal, (Efv. Vet.-Akad. Forh. xxx. 4, p. 52 (1873) \ 



Achurum acridodes, Stal, Recens. Orthopt. i. p. 101 (1873) x ; Thomas, Rep. U.S. Geogr. & 

 Geol. Surv. W. 100th Merid. v. Zool. p. 865 (1875) \ 



Hab. Mexico 1 . 



Whether or not this species is distinct from the preceding remains to be seen. The 

 collections contain no specimens that cannot be referred to A. sumichrasti. 



TRUXALIS, Fabricius* 



Truxalis, Fabr. Syst. Ent. p. 279 (1775) (part.) ; Burm. Handb. Ent. ii. p. 606 (1838) (part.) • 



Stal, Recens. Orthopt. i. p. 92 (1873) ; Morse, Psyche, vii. p. 325 (1896). 

 Metaleptea, Brurmer, Rev. Syst. Orthopt. p. 118 (1893). 



This genus of locusts is confined to the American continent, where it is very widely 

 distributed. Specimens are before me from localities as far north in the United States 

 as the great lakes, and from as far south as the Rio Colorado in Argentina. The 

 variation in the general appearance among individual specimens found in different 

 localities is evident from the number of specific names that have been proposed by 

 various writers. Whether there is sufficient grounds for separating these dissimilar 

 forms inhabiting widely separated localities is a question which I am not prepared to 

 answer at present ; it may be stated, however, that recent writers have referred 

 them to one species. The following rather extensive synonymy will show the 

 confusion which has existed in the past with reference to the representatives of this 

 genus as here limited. 



l. Truxalis brevicornis, Linn. 



Gryllus brevicornis, Linn. Cent. Ins. Rar. p. 15 (1763) x ; Amcen. Acad. vi. p. 398 (1763) 2 ; 



Syst. Nat. 12th ed. ii. p. 692 (1767) 3 ; Turt. Syst. Nat. Linn. ii. p. 542 (1806) \ 

 Truxalis brevicornis, Fabr. Syst. Eut. p. 279 (1775) 5 ; Thunb. Mem. Acad. St. Petersb. v. p. 264 



(1815) 6 ; Stal, Recens. Orthopt. i. p. 104 (1873) \ 

 Tryxalis brevicornis, Burm. Handb. Ent. ii. p. 607 (1838) 8 ; Morse, Psyche, vii. p. 325 (1896) °; 



Scudder, Proc. Dav. Acad. Nat. Sci. viii. p. 19 (1900) 10 . 

 Pyrgomorpha brevicornis, Thomas, Syn. Acrid. N. Amer. p. 68 (1873) ". 

 Metaleptea brevicornis, Giglio-Tos, Boll. Mus. Zool. Univ. Tor. xii. no. 301, p. 1 (1897) 12 ; 



Bruner, Sec. Rep. Merchant's Locust Invest. Comm. B. A. p. 23 (1900) ,3 . 



* The characters of this genus are given in the Synopsis (anted, p. 26) under the name Metaleptea. 



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