Scudder^s List of Orthoptera, 283 



These investigations were undertaken at the suggestion of Prof. 

 Dana, who furnished the specimens of hornstone, the examination 

 of which has enabled me to make these most interesting discover- 

 ies. Yours, &c. M. C. White. 



New Haven, Conn., March 22, 1862. — Am Jour, of Science. 



[We commend the above interesting discovery to the notice of 

 microscopists in Canada. Some of our oldest limestones and 

 cherts, as for example those of the limestones of the Quebec group, 

 present a microscopic appearance similar to that of ordinary flint, 

 and contain numerous minute fragments and globular and spi- 

 cular bodies, some of which may probably be of the same nature 

 with those discovered by Dr. White, though we have not as yet 

 been able to satisfy ourselves of their organic character. Eds.] 



ARTICLE XXES. List of Orthoptera collected on a trip 



Jrom Assiniboid to Cumberland. By Samuel H. Scudder. 



The species enumerated below were obtained during a canoe 

 trip, taken during the summer of 1860, from the Red River set- 

 tlements to the Pas on the Saskatchewan River, and during a 

 few days stay at Fort Garry at the former place. The collections 

 made were small in number both of individuals and of species, 

 because of the meagre opportunities given for collecting upon a 

 hurried trip of this nature, but are interesting because of having 

 passed — so far as the trip extended — over the exact route, taken 

 by Sir John Richardson when making the collections which form- 

 ed the basis of Kirby's work on the Insects of Boreal America. I 

 have been enabled to determine, with but the least deo:ree of 

 doubt, the few Orthoptera described by him, which since his day 

 have been involved in obscurity. This list lays no claims to com- 

 pleteness, but as being an advance on anything hitherto known, 

 it is offered with the hope that by exhibiting to others the mea- 

 greness of our knowledge of the Orthopteran fauna of the great 

 North-West, it may stimulate increased activity in this interest- 

 ing department, where so much remains to be done. Collections 

 from every portion of the British Provinces are earnestly solicited 

 by the author, the most common no less than the uncommon 

 species, in return for which he will be glad to furnish labelled 

 series of collections sent, or of species found within the limits of 

 New England. 



Cambridge, Mass. July 8th, 1862. 



