SCHISTOCERCA, SPHINGONOTUS AND HALMENUS 447 



to the Charles form, and their otherwise dissimilarity to the Chatham 

 form, is probably of more importance than the single character of the 

 color of the hind tibia. All of the Hood specimens have the dark 

 ventral femoral stripe as in the type^ a character shared only with the 

 Charles race. 



Length of tegmina of inale^ 14, 15, 14 = 14.3 mm. ; oi female, 20, 

 19, 18, iS, 17, 19= 18.5 mm. 



SPHINGONOTUS TETRANESIOTIS INDEFATIGABIL- 



ENSIS var. nov. 



From Indefatigable and Seymour Islands. 



Description of the Type. Alale. — Differs from the Charles type 

 as follows : general tone of coloration reddish, no dusky on the head 

 except at lower border of the front. Basal parts of the tegmina with 

 a strong reddish tinge, the lateral blotches confined to the sloping 

 lateral surfaces of the closed tegmina, leaving the dorsal flat area plain 

 except for a few maculations posteriorly between the posterior lateral 

 blotches. No dark line on the ventral surface of the femur. 



Length of tegmina, 18 mm. 

 Variations (23 specimens) . — These specimens differ conspicuously 

 as a group from those of either Albemarle or Charles islands in having 

 in general a much more ruddy tone of coloring. They also lack, 

 almost entirely, the ventral black femoral stripe, some having, how- 

 ever, a very faint indication of it. 



Length of tegmina, of ?nale, 13, 14, 14.5, 12.5, 14, 14, 13, 12.5 

 = 13.4 mm.; oi female, 20, 18, 20, 20, 19, 20, 19, 19, 19, 20, 19, 

 18, 19, 20, 19 = 19 mm. 



These figures show that there is no difference in size between the 

 Charles race and this variety. The two forms are certainly closely 

 related especially in the uniform coloration of the head and thorax, 

 while the hind femora almost duplicate each other in the two cases, 

 except for the ventral stripe present on the Charles form but absent in 

 the other. Another very well-marked distinction, although not quite 

 so constant, is the separation, along the median line, of the black 

 blotches of the tegmina ; in only three specimens do they form com- 

 plete cross bands. 



Genus Halmenus. 



GENERAL REMARKS. 



Halmenus Scudder, Bull. Mus. Comp. Zool., xxv, p. 17, 1893. 



Type Halmenus robust us (Indefatigable and James Islands, Gala- 

 pagos). 



This genus has heretofore been reported only from Indefatigable 



