166 ORTHOPTEKA. 



Hab. North America, east of the Rocky Mountains 1_8 . — Mexico, Coahuila and 

 Chihuahua (L. Bruner). 



If the synonymy of this species were carefully worked out it would no doubt embrace 

 other references in addition to those here given (see Morse, loc. cit.). 



5. Spharagemon cristatum, Scudd. 



Spharagemon cristatum, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 470 (1875) l ; Morse, Psyche, 



vii. p. 295 (1875) \ 

 Dissosteira {Spharagemon) cristata, Sauss. Prodr. (Edip. pp. 138, 139 (1884) 3 . 

 ? Dissosteira {Spharagemon) texensis, Sauss. loc. cit. p, 140 4 . 



Hab. North America, Texas, Florida, N. Carolina 1-4 . — Mexico, La Joya, San Luis 

 Potosi (Jas. A. G. Rehn). 



This insect should also occur across the Rio Grande in both Coahuila and Nuevo 

 Leon. 



6. Spharagemon collare, Scudd. 



(Edipoda collaris, Scudd. Rep. U.S. Geol. Surv. Nebr. p. 250 (1871) \ 



Spharagemon collare, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 470 (1875) 2 ; Morse, Psyche vii. 



p. 296 (1895) '. 

 Dissosteira {Spharagemon) collaris, Sauss. Prodr. (Edip. p. 139 (1884) *. 



Hab. North America, generally distributed east of the Rocky Mountains, especially 

 northward 1_4 . — Panama, Colon (Aspinwall) (coll. S. H. Scudder). 



[SCIRTETICA, Saussure. 



Locusta, Harris, Ins. Inj. Veg. p. 145 (1845) (in part.). 



(Edipoda, Uhler, in Harr. Ins. Inj. Veg. 3rd ed. p. 179 (1862) (in part.). 



Dissosteira (Scirtetica) , Saussure, Prodr. (Edip. p. 135 (1884). 



The genus Scirtetica contains a small number of rather brightly marked species of 

 locusts which, for the most part, are confined to the sea-coast from the mouth of the 

 St. Lawrence River to Mexico. An exception to the rule is S. occidentalis, which 

 comes from the desert regions of California. The two species which may belong to 

 the present fauna may be diagnosed as follows : — 



Table for separating the Species of Scirtetica. 



A. Occiput and disc of pronotum smooth ; hind tibiae more or less red, 



the spines and spurs normal 1. marmorata, Harr. 



AA. Occiput and disc of pronotum rugulose ; hind tibiae testaceous, the 



spines and spurs usually long and heavy 2. occidentalis, Bruner. 



