in Annals of the Carnegie Museum. 



numerous in all grassy openings, in meadows, on savannas, prairies, 

 and even the pampas and llanos, where they are the common grass- 

 hoppers of the respective regions in which each species is found. At 

 least fifty apparently distinct forms have been described. More than 

 half of these occur in North America, where representatives abound 

 from well in Canadian territory to the Isthmus of Panama. In South 

 America at least one species has been described from as far south as 

 the Rio Negro of Argentina, while all of the West Indies are within 

 the range of several other forms. These locusts are slightly below 

 the medium in size and inconspicuous in appearance. The colors of 

 most of them are quite variable, while the characters which separate 

 the species are not strongly apparent, even to the trained entomologist. 

 Undoubtedly several additional forms will be found, when the various 

 regions within the range of their distribution have been more care- 

 fully explored. A later and more critical study of the genus may also 

 result in the better separation of the species. 



Synopsis of the South American Species of Orphulella. 2 

 A . Lateral carinae of the pronotum interrupted between the anterior and posterior 

 sulci. 

 b. Size larger (9. 21-23 mm.). 



c. Separate sections of the carinae lunate; the tibial claws normal. An- 

 tennae filiform obscura Bruner. 



cc. Separate sections of the carinae straight; tibial claws long and strong, 

 the second of inner ones nearly twice the length of the first, recalling 

 Stiraplenra. Antennae subensiform intcrrupta sp. now 



2 In presenting this synoptical table the writer wishes to state that he does so 

 with a knowledge that it is only temporary, and very incomplete even for the de- 

 scribed forms. Walker's Stenobothrus gratiosus {Cat. Derm., Brit. Mus., IV, p. 758) 

 belongs to the genus Orphulella and seems to fall near O. punctata, from which it 

 may be distinct. Male specimens of green color are very rare in punctata. The 

 insect described by Bolivar as Orphula patruelis may also belong to the genus Or- 

 phulella. If so, its "distinctly ensiform " antennae would place it near either crassa 

 or intcrrupta. Possibly Walker's Stenobothrus concinnulus (I. c, p. 759) also belongs 

 here, although Kirby places it with Orphulina (Cat., p. 119). It would come some- 

 where in the vicinity of intricata. The Chrysochraon ? abbreviatum Scudder (Proc. 

 Bost. Soc. Nat. Hist., XII, p. 339) is also, according to a later statement of that 

 author, a member of the genus Orphulella (see I. c, XXVII, p. 206). It very likely 

 belongs near peruna Bruner and chipmani Bruner in the section with straight 

 lateral carinae in advance of the principal sulcus. 0. intricata appears twice in 

 tin- table. It is very similar to insularis both in size and general appearance, 

 although much of the territory between the habitat of the two lacks closely related 

 representatives. 



