252 ORTHOPTEEA. 



Acridium (Opsomala) stollii, Haan, Verh. Nat. Gesch. nederl. Ind. Bezitt., Ins. p. 148 (1844) 3 . 

 tLegua crenulata, Walk. Cat. Dermapt. Salt. Brit. Mus. iii. p. 503 (1870) \ 



Hab. Costa Rica, Port Limon (M. A. Carriker, Jun.), San Carlos (Biolley). 



Two females from Costa Rica are in the present writer's collection. Probably all of 

 the African records are due to Stoll wrongfully assigning L. crenulata to that country, 

 and the later writers copying his locality. 



Walker described the antennae as " slender, setaceous," whereas they are dagger- 

 shaped, or at least the basal joints are strongly flattened. 



CYLINDROTETTIX, Bruner. 

 Cylindrotettix, Bruner, Journ. N. Y. Ent. Soc. xiv. p. 153 (1906). 



In a general way the members of the present genus are closely related to Leptysma, 

 Stal. The main difference is in the absence of a definite median longitudinal sulcus 

 on the fastigium of the vertex. Only a single species seems to be represented. 



l. Cylindrotettix insularis, Brunei-. 



Cylindrotettix insularis, Bruner, Journ. N. Y. Ent. Soc. xiv. p. 153 \ 



Hab. Hondtjkas (coll. Carnegie Museum) ; Costa Rica, San Mateo (Biolley, in coll. 

 L. Bruner). — Teinidad \ 



No males of this genus have been examined. The Honduras and Costa Rican 

 specimens do not differ sufficiently, perhaps, from those coming from Trinidad to 

 warrant their separation, still it is just possible that they represent a distinct species, 

 with a slight trace of a fastigial groove and one in which the discal area of the tegmina 

 is provided with but a single irregular longitudinal vein, instead of with two inter- 

 calaries. The first character brings it very close to the typical Leptysmce. The name 

 C. herbaceus is suggested for this Central-American insect. 



LEPTYSMA, Stal. 



Leptysma, Stal, Receus. Orthopt. i. pp. 42, 85 (1873); Syst. Acrid, i. p. 4 (1878). 

 Opsomala, Serv. (in part.). 



"With the exception of the Trinidad locust which is included here, the North - 

 American forms usually referred to Leptysma are not typical, and, according to the 

 present writer, should be separated and placed by themselves in a new genus. The 

 character "fastigium as long as, or longer than, the longest diameter of the eyes" is 

 not true of these insects, while their body is comparatively robust instead of linear. 

 There are at least two very distinct species of this second group, both of which belong 

 to Mexico or Central America. The individuals in both forms are variable as to 

 general shape, punctuation, and coloration. 



