124 OETHOPTEEA. 



p. Arphia carinata, Scudd. 



(Edipoda carinata, Scudd. Trans. Amer. Ent. Soc. ii. p. 306 (1869) \ 

 Tomonotus carinatus, Thomas, N. Amer. Acrid, p. 106 (1873) 2 . 



Arphia carinata, Uhler, Bull. U.S. Geol. Surv. Terr. iii. p. 794 (1877) 3 ; Sauss. Prodr. (Edip. 

 p. 67 (1884) \ 

 Hal. North America 1-3 , Western Mississippi valley, from Texas northward to 

 British America. 



A. carinata is perhaps entirely absent from Central America, though it may reach 

 the regions bordering the Rio Grande.] 



2. Arphia crepusculum, Sauss. 



Arphia crepusculum, Sauss. Prodr. (Edip. p. 67 (1884) l ; Scudd. Cat. Orthopt. U.S. p. 30 

 (1900) \ 



Eab. North America 1 2 , Texas and Eastern Nebraska (L. Bruner). 



This insect does not differ greatly from the preceding and most certainly occurs 

 along the Gulf Coast beyond the Rio Grande, in Eastern Mexico. 



[3. Arphia xanthoptera, Germ. 



(Edipoda xanthoptera, Germ, in Burm. Handb. Ent. ii. p. 643 (1838) l ; Scudd. Journ. Bost. Soc. 



Nat. Hist. vii. p. 469 (1862) \ 

 Acridium ((Edipoda) xanthopterum, de Haan, Bijdr. Kenn. Orthopt. p. 143 (1842) \ 

 Tomonotus xanthopterins, Thomas, Acrid. N. Amer. p. 105 (1873) 4 . 

 Tomonotus sulphureus xanthopterus, Thomas, Acrid, p. 107 (1880) 5 . 

 Arphia xanthoptera, Scudd. in Hitch. Rep. Geol. N. H. i. p. 377 (1874) 8 ; Sauss. Prodr. (Edip. 



p. 67 (1884) \ 



Hab. North America 1_7 , east of the great Plains, except into the southern 



districts.] 



4. Arphia difficilis, sp. n. 



A dark brown, medium- sized, yellow-winged insect, with moderately high, plainly notched median carina of 

 the pronotum, in which the lateral foveolae of the vertex are unusually large and quadrate. It is most 

 nearly related to A. xanthoptera, as indicated in the synoptic table, but has the dorsal edge of the 

 tegmina pale, instead of concolorous. 



Head and thorax moderately rugose, the frontal costa wide and coarsely punctate above the ocellus, at the 

 upper extremity a little narrowed and bifoveolate ; foveola of vertex broadly subpyriform, and without a 

 median longitudinal carina, except in front and behind, where it is barely visible. Pronotum considerably 

 contracted anteriorly ; the disc flattened on the hind lobe, slightly tectate on the anterior lobe ; median 

 carina evenly arched, plainly cut a little in advance of its middle by the last transverse sulcus ; anterior 

 extremity distinctly angulate, the posterior edge slightly acute. Tegmina extending considerably beyond 

 the tip of the hind femora. Wings of only moderate width, the apex and dusky bands fuliginous, the 

 taenia occupying two rows of cells at its base and reaching about halfway to the base of the wing ; disc 

 and anterior field ochraceous, the extreme front edge narrowly so to the apex. Hind tibise very dark 

 brown, almost black, without pale basal annulus. 



Length of body, $ , 21 ; of antennas 7, of pronotum 6, of tegmina 24, of hind femora 13-5 millim. 



