138 OETHOPTEEA. 



3. Chimarocephala otomita, Sauss. 



Tomonotus otomitus, Sauss. Rev. et Mag. Zool. xiii. p. 322 (1861) x . 

 Chimarocephala otomita, Sauss. Prodr. CEdip. p. 75 (1884) 2 . 



Hab. Mexico 1 2 (Saussure). 

 Not known to the present writer. 



ENCOPTOLOPHUS, Scudder. 



Encoptolophus, Scudder, Proc. Bost. Soc. Nat. Hist. xvii. p. 478 (1875). 

 Tragocephala (in part.), Stal, Becens. Orthopt. i. p. 119 (1873). 

 (Edipoda (in part.), auctt. 



This is another genus of the (Edipodinse belonging exclusively to the American 

 continent. In its distribution it is confined chiefly to the territory covered by the 

 present paper. As indicated by the annexed table, the species are readily separable 

 into two rather distinct groups. 



Table for the separation of the Species of Encoptolophus. 



A. Body very noticeably compressed and deep through the thorax. The 

 median carina of the pronotum well developed. Tegmina regularly 

 transversely banded. 

 b. Insects never largely, or even in part, green. 



c. Larger. Head usually much wider than the front edge of the 



pronotum, the latter with the lateral carinae much interrupted 



in front of the principal sulcus. Dusky bands of the tegmina 



transverse. 



d. Median carina of the pronotum well developed, the anterior 



portion the highest. General colour very dark ; hind tibiae 



fuliginous [1. sordidus, Burm.] 



dd. Median carina of the pronotum less elevated, the two halves 

 of equal height. General colour griseous ; hind tibiae 



glaucous [2. coloradensis, sp. n.] 



cc. Smaller. Head not much wider than the front edge of the pro- 

 notum, even in the female. Lateral carinas of the pronotum 

 less broadly interrupted in advance of the principal sulcus. 

 Bands of the tegmina oblique. 

 d. Summit of the head with only a faint median carina. Tegmina 



considerably longer than the abdomen 3. costalis, Scudd. 



dd. Summit of the head provided with a distinct median carina. 

 Tegmina and wings but little, if any, longer than the abdomen 

 in the ? 4. parvus, Scudd. 



