136 OETHOPTERA. 



Locusta {Tragocephala) infuscata, Harr. Ins. Inj. to Veg. 3rd ed. p. 181 12 . 



Tragocephala infuscata, Scudd. Journ. Bost. Soc. Nat. Hist. vii. p. 461 (1862) 13 ; Glover, 111. 



N. Amer. Ent., Orthopt. t. 10. fig. 10 (1872) 14 ; Thomas, Syn. Acrid. N. Amer. p. 102, t. 1. 



fig. 7 (1873) 15 . 

 Tragocephala viridifasciata infuscata, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 481 (1875) 1G ; 



Thomas, Eep. Illinois St. Ent. ix. p. 106 (1880) 17 . 

 Chortophaga viridifasciata infuscata, Blatch. Canad. Ent. xxiii. p. 76 (1891) 18 . 

 Locusta {Tragocephala) radiata, Harr. Ins. Inj. to Veg. 3rd ed. p. 183 19 . 

 Tomonotus zimmermanni, Sauss. Orthopt. Nov. Amer. ii. p. 23 (1861) 20 . 



Hah. Nokth America 1_2 °, generally, from the Rio Grande to middle Canada east of 

 the Rocky Mountains. — Mexico, along the Rio Grande (L. Bruner). 



This insect is dimorphic in colour throughout its range, both green and fuscous 

 forms being found. In the north, however, the dark-coloured individuals predominate, 

 while in the south the reverse is the case. There is also some variation in minor 

 structure, but not enough to warrant the separation of named varieties. 



2. Chortophaga meridionalis, sp. n. 



Very similar in general appearance to the preceding, but differing from it in the somewhat smaller size and 

 proportionately shorter tegmina and wings. Compared with the North-American insect, C. meridionalis 

 has a shorter, less angulate pronotum, with a little lower and less arched median carina. The fastigium 

 of the vertex is more obtuse, and the frontal costa somewhat broader, smoother, and less deeply sulcate. 

 The intercalary vein of the present form is also more prominent and somewhat bowed, and lies nearer 

 the cubital than it does in G. viridifasciata ; all the veinlets in the basal portion of the tegmina of 

 O. meridionalis are heavier, and give this part a rougher appearance. 



In colour the two insects are very similar ; but,' perhaps, the present species is more uniformly the same in 

 different individuals. Still, both light and dark colour-phases occur. 



Length of body, S 16, $ 26; of antennae, <f 5*5, $ 6; of pronotum, S 4, $ 6-1; of tegmina, $ 15, £ 22; 

 of hind femora, c? 10-5, $ 15*5 millim. 



Hal. Costa Rica, slopes of the Volcan de Irazu, at an elevation of 7500 to 9000 feet 

 (P. Biolley, M. A. Carriker, M. Cary, L. Bruner). 



If this insect occurred throughout Mexico and other Central- American countries, I 

 should regard it as a local race of the preceding species. As it is, however, we must 

 consider it to have been long enough separated from that form to constitute a good, 

 but remarkably similar, species. 



[3. Chortophaga brevipennis, Scudd. 



Tragocephala brevipennis, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 483 (1875) 1 . 

 Chimarocephala brevipennis, Scudd. Ann. Eep. Chief Eng. 1876, p. 508 (1876) 2 . 

 Chortophaga brevipennis, Sauss. Prodr. (Edip. p. 73 (1884) 3 . 



Hab. North Amekica, California (S. H. Scudder). 

 Not recognized by the present writer.] 



