DISSOSTEIRA. 163 



Dissosteira longipennis, Scudd. Ann. Rep. Chief Eng. 1876, p. 511 3 ; Cat. Orthopt. N. Am. p. 38 



(1900) 4 ; Sauss. Prodr. (Edip. p. 137 (1884) 5 . 

 (Edipoda nebraskensis, Bruner, Canad. Ent. viii. p. 123 (1876) e . 



Hab. North America, Idaho and Montana to Texas and N. Mexico 1-6 . 



While no definite records, so far as I know, give this insect as belonging to Mexican 

 territory, it most certainly occurs on the tablelands of Northern Chihuahua, Coahuila, 

 and Sonora. 



[3. Dissosteira spurcata, Sauss. 



Dissosteira spurcata, Sauss. Prodr. (Edip. p. 137 (1884) x ; Scudd. Cat. U.S. Orthopt. p. 37 (1900) 2 . 

 (Edipoda obliterate Thorn, (nee Germ.), Canad. Ent. xii. pp. 221, 222 (1880) 3 . 



Hab. North America, Pacific region, Idaho to California 1-3 . 



While this insect has not been reported from any Mexican localities, it is likely to 

 occur in Northern Sonora.] 



[4. Dissosteira venusta, St&l. 



(Edipoda venusta, St&l, Orthopt. Eug. Resa, p. 344 (1861) *; Bruner, Rep. U.S. Ent. Comm. iii. 



p. 57 (1883) 2 . 

 Dissosteira {Spharagemon) venusta, Sauss. Prodr. (Edip. p. 138 (1884) \ 



Spharagemon venustum, Scudd. Cat. U.S. Orthopt. p. 37 (1900) 4 ; Baker, Invert. Pacif. i. p. 76 

 (1905) 5 . 

 Hab. North America, California 1_5 ; Lower California (Eisen, in coll. Calif. Acad. 

 Sci.). 



This species, on account of its bright vermilion hind wings, is an aberrant form for 

 both the present and the following genera. The colour-pattern of the tegmina would 

 place it with the Dissosteira? rather than in the genus Spharagemon.] 



[5. Dissosteira pictipennis, sp. n. 



A rather small and not very robust insect, having the anterior lobe of the pronotum much narrowed and its 

 median carina well arched and fully twice as high as that on the posterior lobe ; the disc is somewhat 

 inflated and provided with rather coarse lateral carinse anteriorly and lateral rugae just in advance of the 

 transverse sulcus which severs the median carina ; anterior edge somewhat angulate, the posterior margin 

 about a right-angle, the sides nearly twice as high as long, the lower edge oblique, with the posterior 

 angle broadly rounded. Yertex deeply sulcate and provided with a strong median longitudinal carina, 

 which extends across the occiput, and has at the anterior extremity a deep V-shaped depression. Tegmina 

 of medium width, surpassing the abdomen about one-fourth of their length, the apex suboblique, the 

 intercalary vein strong. Hind femora slender, reaching the apex of the abdomen. General colour pale 

 ashy-brown, the tegmina marked with darker flecks, which congregate so as to form three or four narrow 

 transverse patches. Wings with the disc pale vermilion, crossed just beyond their middle by a moderately 

 wide arcuate, fuliginous band, which follows the posterior margin to the anal angle and the front edge 

 to the base, the outer portiou vitreous, Hind femora obscurely fasciate ; hind tibiae pale plumbeous. 



Length of body, $ , 21 ; of pronotum 5, of tegmina 21, of hind femora 12-5 millim. 



Yt2 



