22 



to rugosiis. The data are too scanty, however, to allow important 

 conclusions, and these would be of no particular significance in this 

 discussion, as tuberculatus is only accidental in the regions, and rngo- 

 sus is by no means common. Phoenicopterus is a dry grassland 

 species of southern distribution ; it is not a distinctive sand species. 



Hippisciis haldeinanii Scudder. July 19. 



This species winters in the nymph stage. The seasonal relations 

 to other species have been discussed under H. phoenicopterus. The 

 species is probably restricted largely to sand. It is found in the 

 bunch-grass, and not in blowsand. Not nearly so common as phoeni- 

 copterus. It is a Great Plains species, found in the states east of 

 the Rockies. 



Hippiscus rugosus Scudder. August. 



This species winters in the egg stage, appearing later in the sea- 

 son than the two preceding. It ranges east of the Rocky Mountains, 

 and is probably more abundant in the eastern part of its range. 

 Taken at the Devil's Hole in bunch-grass, by Mr. Hart. Like many 

 other species, rugosus is found in many kinds of dry habitats in the 

 South, but in the northern part of its range, it is confined to isolated 

 areas of sand. 



Dissosteira Carolina Linn. August. 



A common species of roads, but is not found in bunch-grass or 

 bare sand areas in the Havana region. This is rather surprising, for 

 at Grand Tower, Illinois, it w^as regularly found on the sand-plain of 

 the river beach. Those found on sand were conspicuously lighter in 

 color than others, found on black soil. 



Spharagemon wyomingianuin Thom. 



A very common terricolous species of the bunch-grass. Probably 

 the dominant member of its subfamily. It winters in the tgg stage, 

 and is mature from the middle of June probably until frost. A very 

 widespread species, showing great geographic variation. In the 

 northern and eastern part of its range the species is confined to sandy 

 localities. It is not found in blowsand or blowouts. In the eastern 

 part of its range it probably is more important than in the plains 

 region, because in the east it is free from the competition of other 

 species adapted to arid conditions. 



Mestobregma thomasi Gaud. July 19. 



A common terricolous bunch-grass species. It is a rather active 

 species, of western distribution. A late summer form. It is common 



