228 PROCEEDINGS OF THE ACADEMY OF [April, 



cestry, and all have a peculiar and very decided development of the 

 subgenital plate, stegocercus is particularly remarkable in cereal char- 

 acters, mirus in the greatest specialization of the subgenital plate 

 combined with very peculiar cerci, while strumosus has quite similar 

 cerci to mirus, though these are much smaller, but is very different 

 from all other members of the present group in the characters of the 

 supra-anal plate and furcula (fig. 19). 



The females of the present species would be almost indistinguishable 

 from females of M . rotundipennis, were it not for the fact that in the 

 latter species the cephalic width of the dorsum of the pronotum is less 

 than the caudal width of the same to a degree not found in the 

 present insect. 



The variation in size of the present species does not appear to be 

 geographically correlated in any way. The five Currahee Mountain 

 males range in length from 16 to 17 mm., while the largest females 

 are from Tallulah Falls and Spring Creek, 23.5 and 26.2 mm., respect- 

 ively. The smallest female before us is also from Spring Creek, in 

 length 20.1 mm. Though usually wide, the interspace between 

 the tegmina is decidedly variable in the present species. 



In coloration the majority of the series before us have the caudal 

 femora showing scarcely any traces of fuscous bars, one female from 

 Florence, however, has these bars weakly indicated, while the 

 Yemassee female and the two Spring Creek individuals of the same 

 sex have these bars heavy and very pronounced. 



The species was found very scarce on the ground among oak 

 sprouts (Fayetteville, Florence), in underbrush on higher ground, 

 just above where the short-leaf pines disappeared, and in oak sprouts 

 in long-leaf pine woods (Yemassee), while on Currahee Mountain 

 it was found very local on the mountain summit in the luxuriant 

 mountain undergrowth of grasses, vines and oak sprouts (particularly 

 about the latter), in a forest predominantly black-jack oak. 



The Mancus Group of the Genus Melanoplus. 



Of the five species originally included in his "Mancus Series" by 

 Scudder, one only properly belongs to it, this being mancus. Scudderi 

 belongs to a group of which it is the best known representative, while 

 the other three species should be distributed over three other groups 

 which show natural relationships. With mancus, however, should be 

 associated M. islandicus Blatchley and celatus, sylvestris and divergens 

 Morse, the proper sequence apparently being divergens, mancus, 

 islandicus, celatus and sylvestris. 



