400 OETHOPTEEA. 



14. Xiphidium ictum, Scudd. 



Xiphidium ictum, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 461 (1875) j Redt. Monogr. der 

 Conoceph. p. 207. 

 Hab. Mexico, Orizaba, Mirador, O&x&csl (Saussure), Teapain Tabasco (H. H. Smith). 



15. Xiphidium propinquum, Redt. 



Xiphidium propinquum, Redt. Monogr. der Conoceph. p. 208; Griffini, Bollett. dei Mus. di Zool. 

 di Torino, xi. no. 232, p. 29 (1896). 

 Hab. Guatemala (coll. Dohm); Panama, Colon, Punta de Sabana and Tintin, Isthmus 

 of Darien. — Venezuela ; Antilles, St. Vincent. 



[16. Xiphidium ensiferum, Scudd. 



Xiphidium ensiferum, Scudd. Bost. Journ. Nat. Hist. vii. p. 451 (1862) ; Redt. Monogr. der 

 Conoceph. p. 209. 

 Hab. Noeth Ameeica, Illinois, Iowa, Texas.] 



17. Xiphidium mexicanum, Sauss. 



Xiphidium mexicanum, Sauss. Rev. et Mag. Zool. (2) xi. p. 208 (1859) ; Redt. Monogr. der 

 Conoceph. p. 210. 



Hab. Mexico, Presidio de Mazatlan (Forrer), Miacatlan in Morelos (coll. Brunner), 

 Orizaba, Mirador, Oaxaca (Saussure) ; Guatemala (coll. Dohm). 



18. Xiphidium angustifrons, Kedt. 



Xiphidium angustifrons, Redt. Monogr. der Conoceph. p. 210 ; Griffini, Bollett. dei Mus. di Zool. di 

 Torino, xi. no. 232, p. 29 (1896). 



Hab. Panama, Colon, Punta de Sabana, Isthmus of Darien. — Colombia, Bogota, 

 Tolima. 



THYSDRUS, Stal. 



Phluffis, Stal, Freg. Eugen. Resa, Ins. p. 324 (1860) . 



Thysdrus, Stal, Recens. Orthopt. 2, p. 102 (1874) ; Redtenbacher, Monogr. der Conoceph. p. 219. 



The species of this genus are all of the same form and are very closely allied. 

 They have been partly distinguished by the neuration of the elytra, but this character 

 cannot be relied upon, the number of the transverse venulae being somewhat variable. 

 The elytra are in both sexes membranaceous. 



Synopsis specierum. 

 I. Feminee. 



a. Ovipositor mediocris, falcatus, quam cerci longior. 



b. Elytra ad apicem dense reticulata, venulis transversis numerosis. 



