462 PROCEEDINGS OP THE AMERICAN ACADEMY. 



23. Schistocerca literosa. 



Acridium Uterosuni Walk./Cat. Derm. Salt. Brit. Mus., IV. 620 (1870) ; Butl, Troc. 



Zo(j1. Soc. Lond., 1877, 88 (1877). 

 Schistocerca literosa Scudd., Bull. Mus. Comp. ZotU., XXV. 15, pi. 2, figs. 1, 3 (1893). 



This species is known only from the Gahipagos, and has been found 

 on Chatham, Hood, Tower, and Charles Islands, the forms occurring on 

 each island, or on all but the last, being distinct enough to be regarded 

 as races, as I have pointed out in the paper above cited, where nine points 

 of distinction are tabulated. 



24. Schistocerca melanocera. 



Acridium melanoccrum Stal, Eug. Resa, Ins., Ortb., 326 (1860). 



Acridium {Schistocerca) melanocerum Stal, Bee. Orth., I. 65 (1873). 



Schistocerca vielanocera Brun., Proc. U. S. Nat. Mus., XII. 193 (1889); Scudd., 



Bull. Mus. Comp. Zoiil., XXV. 11, pi. 2, figs. 5, 6 (1893). 

 Acridium tibiale Walk., Cat. Derm. Salt. Brit. Mus., III. 582 (1870) t. Walker. 



This is known to me only from the Galapagos Archipelago, where ii 

 has been found on Charles, Albemarle, Indefatigable, Chatham, Jervis, 

 Barrington, James, and Duncan Islands; but it is also credited by Walker 

 to the '* west coast of America." In my paper on the Orthoptera of the 

 Galapagos, quoted above, I have discussed at length the distinct types 

 which appear to be forming ou the different islands. 



25. Schistocerca rubiginosa. 



Acridium nd)iginosum Harr.!, MS., Scudd., Bost. Journ. Nat. Hist., VII. 467 (1862). 

 Schistocerca rubiginosa Morse, Psyche, VII. 105 (1894). 



■?■? Acridium scutellare Walk., Cat. Derm. Salt. Brit. Mus., III. 579 (1870). Cf. 

 No. 3, above. 



This insect is found along the entire Atlantic coast of the United States 

 from central Massachusetts to Key West, Florida, and in the interior, 

 east of the Great Plains, from as far north as Iowa and Minnesota to the 

 Gulf, and it extends into Mexico and even farther south. 



My specimens come from Massachusetts, Sanborn ; Wellesley, Aug. 8, 

 Sept. 24, Oct. 10-11 (Morse), Dedham, Aug., Maynard (Morse), Prov- 

 incetown, Sept. 4-6 (Morse), and Hyannis, Mass., Scudder ; Kingston 

 and Wickford, R. I., Aug. 29 (Morse); Connecticut, Uhler, Norton; 

 Thompson, Aug. 6, 9 (Morse), Deep River, Aug. 24 (Morse), North 



