1-46 THE CANADIAN ENTOMOLOGIST. 



of the lobes of the median carina and of the lower part of the face. As 

 the specimen is immature, these differences may be those of immaturity. 

 No relationship exists with D. plutonius, Bruner (North Amer. Fauna 

 No. 7, p. 267). 



Schistocerca vaga (Scudder). 



Two females ; April 24 and July 17, 1901. 



yEOLOPLUS CHENOPODII ARCUATUS, n. Sllbsp. 



Type: £ and $ ; San Diego, California, May 18 and 28, 1901. 



Very closely allied to ^E. chenopodii from Grand Mesa, Colorado, 

 but differing in the rotundate caudal margin of the subgenital plate, this 

 region in chenopodii being acuminate (see Scudder, Proc. U. S. Nat Mus., 

 XX., pi. V., fig. 9), and in the more apparent prozonal median carina, 

 this section being " wanting or rarely indicated " in chenopodii. 



Size medium. Pronotum with the pronotal carina quite distinct, 

 except on the caudal portion of the prozona, where it is obsolete. 

 Subgenital plate of the male with the caudal margin rotundate ; cerci 

 tapering to a very fine point. 



Colour apparently the same as true chenopodii. 



Measurements : 6* • 9  



Length of head and body 15.5 mm. 22 mm. 



Length of pronotum 4.2 " 6 " 



Length of tegmina 4.2 " 5.5 " 



Length of posterior femora 11.5 " 14 " 



Four specimens of this species have been examined: two males, two 

 females. 



Melanoplus Rileyanus, Scudder. 

 One female ; April 10, 1901. 



Family Tettigonid/E. 

 Conocephalus mexicanus, Saussure. 

 One female; May 13, 1901. 



Family Gryllid^e. 

 Gryllus assimilis (Fabricius). 



One male; July 28, 1901. 



This is much smaller than Mexican specimens of assimilis, but it is 

 clearly the same species. 



