SCHISTOCERCA, SPHINGONOTUS AND HALMENUS 423 



SCHISTOCERCA MELANOCERA var.? 



From Jervis Island. 



Scudder had one male specimen from this island, which he says " is 

 almost an exact duplicate of some of the similarly sized males from 

 Albemarle Island, with faintly infumated wings." There are, how- 

 ever, at least two distinct races on Albemarle, so that the relationship 

 of the Jervis form must be left doubtful since we did not visit this 

 island. 



SCHISTOCERCA MELANOCERA LINEATA var. nov. 



(PI. XXVII, fig. 5.) 



From Iguana Cove, Albemarle Island. 



Description of the Type. Fetnale. — Differs in the following char- 

 acters from S. tnelanocera ?neIanocera : abdomen very dark brown, 

 lower edges of the terga yellow, forming a conspicuous stripe along 

 the side of the abdomen ; meso- and metasterna dark olivaceous-slaty, 

 with a pale stripe on each side reaching from the mesocoxa to the 

 anterior border of the mesosternum just back of the anterior coxa. 

 Length of the tegmina, 53.5 mm. 



Variations (18 specimens). — This variety is very distinct from 

 the race at Tagus Cove on Albemarle, and, as will be shown, possesses 

 the lateral abdominal stripe in common only with the Indefatigable and 

 Seymour variety. Hence it appears to be related on one hand to the 

 form inhabiting these islands and on the other to the Tagus Cove and 

 the Charles races. All of the specimens have the lateral stripe on the 

 abdomen, although its intensity varies. This mark is present on two 

 of the Tagus Cove specimens but is much less distinct than in the 

 majority of the Iguana Cove specimens. The lateral pale lines on the 

 mesosternum are present on some of the Tagus Cove specimens as a 

 mere suspicion of their existence. 



Length of tegmina of jnaie, 39, 40, 39, 38, 38, 39, 40, 40 = 39.1 

 mm. ; oifemale, 55, 53, 48, 54, 45, 54, 53, 50, 50, 48 = 50.9 mm. 



SCHISTOCERCA MELANOCERA IMMACULATA var. nov. 



(PI. xxvii, fig. 6.) 

 From Indefatigable Island and South Seymour Island. 

 Description of the Type. j\Iale. — Agrees most closely with S. m. 

 lineata of Iguana Cove, but differs conspicously from the type of that 

 race as follows : frontal costa and entire lower part of face including 

 the clypeus and labrum yellow, except for a slight brownish area just 

 below frontal ocellus ; metazona bright pale yellow; no yellow spot on 



