1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



473 



one female from the foothills of the Bird Spring Mountains, Nevada, 

 August 11, are inseparable from this species, previously known only from 

 Cape San Lucas, Lower California, and Sonora, Mexico. 



The appendages of the males are identical with Scudder's figure, 

 but it would seem as if the typical material was shrunken from immer- 

 sion in spirits, as Scudder states the figured male "is . . . . some- 

 what distorted by preservation in spirits," and the same medium 

 has apparently rendered some points of the coloration obscure. The 

 dimensions of a Cottonwood pair and the Nevada female are as follows : 



Cottonwood, d? 21 



Cottonwood, 9 25.5 



Foothills Bird Spring Mountains, 9 27 



The postocular bar is faint in one specimen and distinctly marked 

 in the others, while the entire dorsum, except for a pair of narrow 

 lateral more or less distinct yellowish carinal lines, is sprinkled and 

 clouded with umber. The caudal femora bear traces of transverse 

 bars, in fact quite distinct ones dorsad, while the ventral and internal 

 faces of the same portions are orange or orange- red. The caudal 

 tibiae are glaucous, varying from very pale to quite deep in shade. 



This was one of the extremely vigorous and scarcer desert species. 

 In habits it closely resembled Melanoplus bowditchii, being quite 

 as active and shy. 



Melanoplus marginatus form pauper Scudder. 



At Ahwahnee, September 3, this interesting insect was found com- 

 mon in a rank growth of high tarweed, a series of six males and seven 

 females being taken. 



Considerable individual variation in size is exhibited by these speci- 



mens, the extremes being as follows: 



Length of body, . 

 Length of pronotum, 

 Length of tegmen, 

 Length of caudal femur, 



c? 



c? 



In general coloration some specimens are distinctly darker than 

 others, but the pattern is essentially the same in all the series. 

 31 



