134 



usually is; but this is easily to be accounted for when we take into consid- 

 eration the character of the soil upon which they lived and wore taken. 

 In fact, generally, species collected upon the " red soil of the Gypsum 

 Hills" of Barber Co. show a tendency to ferruginous hues even in insects 

 that it would be supposed never occur in that color. I have often noticed, 

 while collecting insects at various localities in the Rocky Mountain region, 

 that where the soil was light colored, the insects were also light colored, 

 and where the soil was dark, the prevailing hues of the insects found in 

 the locality were likewise dark. 



This species is an aberrent form, when compared with the other species 

 of the genus to which it belongs, and resembles the members of the genus 

 Trimerotropis to a great extent. 



54. Trimerotropis vinculata Seudd. A single specimen from Barber 

 Co. (Cragin) is referred to this species. 



The species appears to be very common wherever found, and I have re- 

 ceived specimens from various portions of Texas, New Mexico, Arizona 

 and California. I have never collected it myself, but from its appearance, 

 I should say that it frequents localities where vegetation is somewhat scat- 

 tered and dwarfed, and the soil alkaline. 



55. mestobregma plattei Thos. Barber Co. (Cragin). 



Saussure suppresses the genus Mestobregma of Scudder, of which this 

 species is the type, and includes all of its species in the genus Psinidia. 

 This he has evidently dene on the authority of Dr. Siael, who describes 

 several closely allied forms from Texas, under the generic name Psinidia. 



56. Mestobregma cincta Thos. Topeka, Shawnee Co., (Cragin). 



Thi species is somewhat more slender, and has much narrower elytra 

 than the preceding. It is somewhat closely related to M. Kioiva Thos., 

 from which it can readily be distinguished by colored wings with a fuscous 

 band, while in Kiowa the wings are perfectly hyaline throughout. A 

 fourth species occurs in Montana, which is confined to Eurotia lanata as a 

 food plant. This latter species I call Mestobregma pidchella, from its 

 beautiful colors. 



57. Haclrotettix trifasciata Say. Ford Co. ; Sun City, Barber Co., 

 and Garden City (Cragin). 



This locust is a very variable one indeed, and it is a great wonder that it 

 has not been described oftener than it has. I have specimens from as far 

 north as Ft. McLeod, on the South Saskatchewan, where I collected quite 

 a large series of locusts of different species. It also occurs in Texas, where 

 it is much larger than in the north. CEdtpoda pruinosa and CE. Hoff- 

 mnni are synonymous of this species. 



58. Bractiystola magna Girard. Barber Co. (Cragin); Reno Co. ( H. 

 P. O'Hara). 



This is one of the most clumsy insacts that I know, and occurs through- 

 out the great plains, from the Mississippi River westward to the Rocky 

 Mountains, where it is popularly known as the "lubber grasshopper," the 

 'buffalo hopper" and by several other equally appropriate names. How- 

 ever clumsy and dull it may appear, it seems to know enough to keep in 

 the shape during the heat of the day, and at such times can be found com- 



