AEPHIA.— CHOKTOPHAGA. 135 



While this insect probably does not reach the region under investigation, it was 

 made the type of the genus, hence should be included here. The Californian habitat 

 given for this species very likely belongs to the preceding, or it may be even to 

 A. frigida, both of which are Pacific slope forms, while A. sulphurea is confined to the 

 eastern half of the continent.] 



CHORTOPHAGA, Saussure. 



Tragocephala, Harris, Ins. Inj. to Veget. 1st edit. p. 147 (1841, 1842) ; Stal, Recens. Orthopt. i. 

 p. 119 (1873) ; Thomas, Acrid. N. Amer. p. 102, fig. 7 (1873) ; Scudder, Proc. Bost. Soc. Nat. 

 Hist. xvii. p. 481 (1875) (nomen prseocc). 

 Chimarocephala, Scudder (in part.), Proc. Bost. Soc. Nat. Hist. xix. p. 89 (1876). 

 Chortophaga, Saussure, Prodr. (Edip. p. 72 (1884). 



A characteristic North-American genus composed of comparatively few species, 

 which are very variable in colour and widely distributed. The nymphs live over 

 winter and therefore are among the first locusts to mature in spring. The males are 

 moderately noisy insects and their stridulating may be heard on warm days of early 

 spring. These insects frequent the margins of groves, thickets, and weed patches, 

 among the fallen leaves and other debris in which they hide during cold weather. 



Table for separating the Species of Chortophaga. 



A. Scutellum of the vertex in the ? triangular ; the posterior field 

 of the wing provided with a semilunar fuscous band. 

 b. Tegmina and wings fully developed, fully as long as or longer 

 than the abdomen. 

 c. Larger : North America from Northern Mexico to the great 



lakes 1. viridifasciata,T)e Geer. 



cc. Smaller : Central America, in the mountains of Costa Rica . 2. meridionalis, sp. n. 



bb. Tegmina and wings abbreviated [3. brevipennis, Scudd.] 



AA. Scutellum of the vertex in the ? obtuse, pentagonal, the apex 



obtuse ; the wings sublimpid (Island of Cuba) 4. cubensis, Scudd. 



l. Chortophaga viridifasciata, De Geer. 



Acrydium viridifasciatum, De G. Mem. Hist. Ins., Orthopt. iii. p. 498, t. 42. fig. 6 (1773) \ 

 Locust a (Tragocephala) viridifasciata, Harr. Ins. Inj. to Veg. 1st ed. p. 147 (1841) 2 ; 3rd ed. 



p. 182, t. 3. fig. 2 (1862) 3 . 

 Tragocephala viridifasciata, Scudd. Journ. Bost. Soc. Nat. Hist. vii. p. 461 (1862) 4 ; Proc. Bost. 



Soc. Nat. Hist. xvii. p. 481 (1875) 5 ; Glover, 111. N. Amer. Ins., Orthopt. t. 5. fig. 9 (1872) 6 : 



Thomas, Syn. Acrid. N. A. p. 103, t. 1. fig. 3 (1873) 7 ; Stal, Recens. Orthopt. i. p. 119 



(1873) 8 ; Riley, Rep. Ins. Missouri, viii. p. 149, fig. 46 (1876) fl . 

 Chortophaga viridifasciata, Sauss. Prodr. (Edip. p. 72, t. 1. figg. 7, 12 10 ; Scudd. Cat. Orthopt. 



U.S. p. 31 (1900) ". 



