SCHISTOCERCA, SPHINGONOTUS AND HALMENUS 425 



Indefatigable specimens, differing from them in having the lateral spot 

 on the scutum " tolerably distinct in all, and in one very fairly marked." 



SCHISTOCERCA MELANOCERA var.? 



From Narboro Island. 



There are only three specimens in the collection from Narboro 

 Island, and they do not agree w^ith one another nor w^ith any other one 

 form. One specimen resembles the Iguana Cove specimens of Albe- 

 marle ; it has the lateral stripe on the abdomen well marked, contrast- 

 ing strongly w^ith the very black color of the rest of the abdomen, 

 although the stripe itself is reddish-brown. One of the other two 

 specimens differs from the first in having the lateral abdominal stripe 

 not so distinct. The third specimen, a male, differs from the first and 

 second in lacking the abdominal stripe and in having the abdomen and 

 the ventral surface of the thorax pale. This one resembles the speci- 

 mens from Tagus Cove. The distance between Narboro and Tagus 

 Cove is only about three miles and it is scarcely to be supposed that 

 the grashoppers do not sometimes cross from one island to the other. 



Length of tegmina of male, 40 mm. ; of female, 50, 47 = 48. 5 mm. 



SCHISTOCERCA LITEROSA (Walker). 



(PI. XXVII, fig. 4.) 



Acridium literosum Walker, Cat. Derm. Salt. Brit. Mus., iv, p. 620 ; v, 

 Suppl., p. 63. — Butler, Proc. Zool. Soc. Lond., 1877, p. 88. 



Schistocerca sp. Brunner, Proc. U. S. Nat. Mus., xii, p. 193. 



Schistoccrca Uterosa discoidalis ScuDDER, Bull. Mus. Comp. Zool., xxv, p. 16, 

 1893. (Chatham Island.) 



From Chatham Island. 



Scudder has tabulated characters on which he separates the Schis' 

 tocerca of Chatham, Hood and Tower Islands into three distinct races, 

 and these races he designates by variety names. The collection here 

 reported on is much more extensive than that of Scudder, being rep- 

 resented by sixty-four specimens from the three islands, and, while 

 some of Scuddcr's characters do not hold, the most important ones do. 



Description of a Typical Chatham Specimeti, Female. — Head 

 dull reddish-brown with black and obscure yellowish markings ; a 

 black stripe extending from middle of posterior border of eye back- 

 ward and downward to pronotum, split by a narrow line of the general 

 color of head ; just below eye a small black spot ; space back of this 

 and below post-ocular stripe and extending to lower border of gena 

 slightly paler and more yellowish than rest of head ; two rows of 

 irregular black punctations on vertex on each side of median line. 



