254 ENTOMOLOGICAL NEWS. [Sept., '06 



there are two species of Ageneotettix, namely : deorum Scud- 

 der, and saidderi Bruner. But McNeill further states in his 

 Revision, p. 269, that it is quite probable that the former spe- 

 cies is identical with the latter, implying thereby that saidderi 

 is the only representative valid species. In another place he 

 mentions also under E. saidderi Bruner, that ' ' One variety of 

 this species has the vertex usually broad between the eyes, 

 with the anterior margins bounded by carinse, which meet at 

 an angle much greater than a right angle even in the male." 

 This variety, McNeill adds, was received from Prof. Gillette 

 under the name of Aulocara saidderi Bruner, and another form 

 with narrower vertex under the appelation Dociostaurus colora- 

 densis. " Both forms being named by comparison with speci- 

 mens determined by Prof. Bruner. ' ' 



The present status of the described species according to 

 Scudder's Alphabetical Index to North American Orthoptera 

 is that the two species deorum and scudderi are the only ones 

 retained. Scudder and Cockerell * noted both species as occur- 

 ing in New Mexico, a third species which was not described is 

 also mentioned by them. 



As intimated in the beginning of this paper my present con- 

 tention is that still another species occurs in Illinois. Its 

 identity becoming evident after study of a series of specimens 

 from Chicago. The confirmation of this species was made 

 possible by comparison with a type specimen of saidderi which 

 Prof. Bruner kindly presented to me. The difference be- 

 tween scudderi and the Illinois form, which for convenience is 

 called arenosus, is very marked, yet this latter species has 

 probably been confused by Lugger and Blatchley as saidderi. 

 Both of these writers described and figured it under the latter 

 name in each of their State catalogues of Orthoptera. More- 

 over, McNeill probably also refers to it in part, in his Revision 

 under scudderi, as occuring in a few localities near Moline, Illi- 

 nois. Though the description given by Blatchley f under A. 

 scudderi fits arenosus quite accurately, I have drawn up the 

 following comparisons of the two species side by side, that they 

 may be readily recognized : 



* A first list of the Orthoptera of New Mexico, Proc. Daven. Acad. Sci., ix, p. 27, 1902. 

 f Orthoptera of Indiana, p. 248, 1902. 



