259 



stages inhabiting the stem bases of C/n-i/xop.si.s rillosn and 

 Lup'tniis sp. after the manner of our species on VnlUrhoe. He 

 regards this as a result of the arid environment, the envelop- 

 ing froth with which the young surround themselves being 

 more easily maintained here than on exposed twigs ; and he as- 

 sumes that the adults oviposit on these herbaceous food plants 

 of tiieir young. In the Illinois valley sand region there are 

 no wild conifers. 



Systematic Notes. 



Note 1, p. 280. — Bacunculiis hlatchleyl. Walsh described his 

 D'tnpfuroiiiera /-f/// from Nebraska males and Illinois females. Scud- 

 der, in his Catalogue, credits relli to Nebraska only. The comn:on 

 prairie species of Illinois and Indiana, which we have been calling 

 veJii, was represented in our collections mostly by female specimens, 

 but it was noted that the mules indicated either that our relii was 

 not a typical Diapheromera or that it was a Baeunculus. Mr. A. N. 

 Caudell has received from Mr. W. S. Blatchley a pair of alcoholic 

 specimens taken in Indiana, and described them as Bncuneulus 

 hlatclileyi. Mr. Caudell has kindly sent me a typical male velii 

 from Kansas, and I can now say with certainty that our specimens, 

 and also thost; in Mr. Elatchley"s cabinet, which I had previously ex- 

 amined, are all Bactincidus hlatchleyi^ to which species Walsh's 

 females probably belonged. It is an inhabitant of rank prairie 

 vegetation like rdii, while femorata is a forest species. I ha^ e also 

 taken hlaic^leyi SLtLa,ke Geneva, Wis., as stated in the list. 



Note 2, p. 231. — Eritetti.v virgaft/s'! This single female agrees 

 with Scudder"s description and McNeill's key except that the sup- 

 plementary carinae of the pronotum are almost entirely obsolete. It 

 is possibly a new species. 



Note 3, p. 231. — Ayetieotettii' sexdrlerl. Hancock ("06) has col- 

 lected examples of Ayeneotettix near Chicago, which, after compari- 

 son with a type specimen of A. sciidderi. he has described as a new 

 species under the name arenosi/s, suggesting that the Minnesota, Illi- 

 nois, and Indiana sriulderi of Lugger, McNeill, and Blatchley respec- 

 tively are probably also aveuosH.s. According to him, arcitotois, as 

 compared with srtuhlerl, is smaller and more slender, with the vertex 

 right-angled, not acute-angled as in srudderi,the foveoht deeper, the 

 tegmina slightly shorter, etc. He has evidently overlooked Bruner's 



