SCHISTOCERCA, SPHINGONOTUS AND HALMENUS 44I 



other hand S. trinesiotis indefatigabilensis and S. trinesiotis albe- 

 7narlensis agree with each other and differ from all the others in 

 having the genae slate-colored. The Chatham specimens, however, 

 very commonly have the genae paler and more uniform in color than 

 the rest of the head. It is readily conceivable that this race may once 

 have had slate-colored genae, and that, before this character was lost, 

 the ancestors of the Indefatigable and Albemarle races left Chatham. 

 The only Chatham nymph obtained is i6 mm. long and is marked in 

 every way like the adults. 



SPHINGONOTUS TRINESIOTIS INDEFATIGABILENSIS 



var. no v. 



From Indefatigable and Seymour Islands. 



Description of the Type. Male. — Head dark gray above ; front 

 dusky, pale reddish-brown about the bases of the antennae ; genae with 

 a very pronounced slaty color; a distinct black post-ocular stripe ex- 

 tending from the eye backward and almost imperceptibly upward. 

 Antennae colored as with other races. Pronotvim mixed dusky and 

 reddish-brown ; on upper part of the sides of the prozona a distinct 

 black stripe continuous in front with the post-ocular stripe and faintly 

 prolonged posteriorly to the reentrant angle of the posterior margin of 

 the metazona ; below this a lighter colored area, which on the prozona 

 is pale slaty, on the metazona reddish mottled with black ; below this 

 a second distinct black stripe, inclined obliquely downward and for- 

 ward on the prozona, downward and backward on the metazona ; be- 

 low this stripe both prozona and metazona uniform, pale rusty. Sides 

 of mesothorax and metathorax mottled with red, slate, brown and 

 black. Thoracic sterna, as in the specimens from the other islands, 

 uniform pale. Fore and middle legs reddish-brown, spotted with 

 black. Hind femora with two dark blotches on the inner surface 

 from the upper to the lower carinas, situated as in the other forms ; no 

 prominent longitudinal dark line below ; a small spot below, opposite 

 the lower end of the posterior inner blotch, and on the left femur in 

 front of this a very inconspicuous dark longitudinal line ; outer sur- 

 face also with two blotches, these opposite those on the inner surface. 

 Femur otherwise pale, yellowish, clay-colored except terminal en- 

 largement which is reddish-brown. Hind tibia dark at the upper 

 end, below pale yellowish on the outer side, brownish on the inner 

 side, except just below the upper black area when yellow ; spines 

 black-tipped, bases yellowish. Tarsal claws yellow, black-tipped. 

 Abdomen above rusty-brown with the anterior ' parts of the terga 



