ENCOPTOLOPHUS. 139 



bb. Insect frequently in large part green. 



c. General form rather robust. The sulcus of the vertex pyriform, 

 rather broadly so in the ? . 

 d. Pronotum decidedly obtuse- angled posteriorly ; the median 



carina severed near its middle. (Montana.) [5. montanus, sp. n.] 



dd. Pronotum nearly right-angled posteriorly; the median carina 

 severed considerably in advance of the middle. (Mountains 



of Chihuahua.) 6. fuliginosus, sp. n. 



cc. General form more slender. The sulcus of the vertex much 

 narrower, its sides evenly convergent anteriorly. 

 d. Smaller. The lateral carinae of the pronotum slightly inter- 

 rupted in advance of the principal sulcus. (Mexico south- 

 ward.) 7. herbaceus, sp. n. 



dd. Larger. The lateral carinae of the pronotum uninterrupted. 



(Southern California.) [8. californicus, sp. n.] 



AA. Body more nearly cylindrical, less deep through the thorax. Median 



carina of the pronotum rather weak. Tegmina less regularly 



marked with light and dark. 



b. Tegmina and wings extending considerably beyond the tip of the 



abdomen in both sexes, the latter yellowish-hyaline basally, 



infuscated apically 9. texensis, sp. n. 



bb. Tegmina and wings, at least in the ? , extending but little, if at 

 all, beyond the tip of the abdomen ; the wings pellucid. 

 c. More robust : the sexes rather unequal in size. Hind femora 



robust 10. subgracilis, Caudell. 



cc. More slender : the sexes not greatly unequal in size. Hind 



femora less robust [11. pallidus, Bruner.] 



[l. Encoptolophus sordidus, Burm. 



(Edipoda sordida, Burm. Handb. Ent. ii. p. 643 (1838) ' ; Glover, 111. N. Amer Ent., Orthopt. 



t. 10. fig 11 (1872) 2 ; Thomas, Acrid. N. Amer. p. 116 (1873) 3 . 

 Acridium ((Edipoda) sordidum, Haan, Bijdr. Kenn. Orthopt. p. 143 (1842) 4 . 

 Tragocephala sordida, Stal, Recens. Orthopt. i. p. 119 (1873) 5 ; Thomas, Rep. St. Ent. Illinois, ix. 



p. 211 (1880) 8 . 

 Encoptolophus sordidus, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 479 (1875) 7 ; Sauss. Prodr. 



(Edip. p. 77 (1884) 8 . 

 (Edipoda (Encoptolophus) sordida, Prov. Faune ent. Canad. ii. p. 41 (1877) 9 . 

 Arpkia sordida, Osborn, Bull. Div. Ent. U.S. Dept. Agric. xxiii. p. 59 (1891) 10 . 

 Locusta peris celidus, Say, in Harr. Cat. Ins. Mass. p. 56 (1835) u . 

 Locusta nebulpsa, Harr. Ins. Inj. to Veg. p. 146 (1841) 12 . 



Hab. North America 1-12 , Texas (Saussure), U.S. and Canada east of the Eocky 

 Mountains (Scudder). 



Tt 2 



