258 



Mecostethus pJatypterus Scudd. (Page 231) "While this article is 

 going through the press I find Mr. E. D. Ball's list of Iowa 

 Orthoptera ('97), supplementary to that of Osborn, in which he 

 records this species from the extreme northwestern corner of 

 that state. Otherwise it is known only from New England, 

 and is only so listed by Scudder in his Catalogue ('00). Mr. 

 Ball also records Mermirm hivittato from Iowa, which is a 

 little north of its usual range. 



Arphia xanthoptera Germ. (Page 232) On'page 214, in discussing the 

 differences of hind-wing coloration of certain Ofthoptera in 

 dry and humid environments, I mention the lack of sufficient 

 material for a comparison of the two variably colored species 

 which are common both in the sand region and on the humid 

 prairie. An opportunity for such a comparison has since been 

 afforded by the kindness of Mr. .1. D. Hood, of the University 

 of Illinois. Mr. Hood is making a very interesting study of a 

 similar sand region in "Wisconsin, and has secured a large se- 

 ries of Arphia j'anthoptero, which may properly be compared 

 with our series from the humid prairie, as the effect of aridity 

 would be reduced rather than increased by the higher latitude 

 of his locality. Blatchley says that in Indiana one third or 

 more of the males have yellow wings and not over one sixth 

 of the females, or an average of one fourth. Our collections 

 show practically identical conditions, the usual color being a 

 clear orange-red. On the other hand, Mr. Hood states that 

 although in the Wisconsin sand region this species was very 

 abundant, being seen by the hundreds every da\', only a sin- 

 gle orange-winged specimen was observed during five weeks' 

 collecting, all the rest having yellow wings with at most a 

 faint tinge of orange. Mr. Hood pertinently points out that 

 the original color in all these species is probably that found in 

 the more arid environment-: not the reverse, as might be 

 inferred from my wording. 



Lepyronia gihhosa Ball? (immature). In the preceding list (page 

 236) I have mentioned immature CerrdpUhc, probably L.gihho- 

 so, occurring on the extreme bases of the stems in tufts of Cnl- 

 Urhoe triangulata. Ball ('01) has found a western Aphroph- 

 ora feeding on pine in the adult stage, but in the immature 



