SPHARAGEMON. 165 



AA. Carina of pronotum variable, unequally compressed ; the disc not flat 

 in longitudinal section. 

 b. Pronotum with its median carina not greatly elevated, yet distinctly 



carinate 4. tsquale, Say. 



bb. Pronotum with its median carina cristate. 



c. The crest greatly elevated, both sections arched 5. cristatum, Scudd. 



cc. The crest less strongly elevated, the anterior portion straight or 



sinuate 6. collare, Scudd. 



1. Spharagemon bolli, Scudd. 



Spharagemon bolli, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 469 (1875) l ; Morse, Psyche, vii. 



p. 290 (1895) \ 

 Dissosteira {Spharagemon) bollii, Sauss. Prodr. CEdip. p. 140 (1884) 3 . 

 Spharagemon balteatum, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 469 (1875) *. 



Eab. North America, South-western Texas 1-4 . 



Not contained in the material before me coming from Mexican territory. It most 

 certainly occurs across the Rio Grande in the States of Coahuila and Nuevo Leon. 



2. Spharagemon robustum, Morse. 



Spharagemon robustum, Morse, Psyche, vii. p. 291 (1895) \ 

 Eab. Mexico, Coahuila (coll. S. H. Scudder : 1 $ 1 ). 



Professor Morse says this may be an extremely large form of the preceding species 

 (loc. cit.). 



[3. Spharagemon inornatum, Morse. 



Spharagemon inornatum, Morse, Psyche, vii. pp. 291 (1895) \ 

 Eab. North America, Hot Springs, New Mexico {coll. L. Bruner l ). 



While no records of the presence of this insect in Mexican territory are at hand, the 

 fact that it comes from the arid south-west would suggest that it is liable to be met 

 with in suitable situations in Chihuahua as well.] 



4. Spharagemon aequale, Say. 



Gryllus tsqualis, Say, Journ. Acad. Nat. Sci. Philad. iv. p. 307 (1825) \ 



Locusta cequalis, Harr. Cat. Ins. Mass. p. 56 (1835) 2 . 



(Edipoda cequalis, Uhler, in Harr. Ins. Inj. Yeg. 3rd ed. p. 178 (1862) 3 . 



Trimerotropis cequalis, Scudd. in Hitchc. Rep. Geol. New Hampshire, i. p. 377 (1874) *. 



Spharagemon (equate, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 468 (1875) 5 ; Morse, Psyche, vii. 



p. 291 (1895) 6 . 

 Dissosteira [Spharagemon) cequalis, Sauss. Prodr. CEdip. pp. 139, 140 (1884) \ 

 ? (Edipoda belfragei, Stal, Recens. Orthopt. i. p. 129 (1873) 8 . 



