ORTHOFTERA ACRIDIDAE INTRODUCTORY REMARKS. 859 



an obtuse, somewhat rounded, angle ; pronotum cristate, the crista on each 

 lobe near the posterior sulcus depressed. 



This includes the R. cquita, Burm., Monacliidium superbum, Stal, and 

 jR. pecticornis, Walk. Stal describes the last named species as new under 

 the name T. pidicornis. This collection contains several specimens of this 

 fine species, which will be noticed at the proper place. 



Still's division of this heterogeneous group into different genera is emi- 

 nently proper; for a single glance at E. microptera and R. miles is sufficient 

 to convince any entomologist that they are generically distinct. As the 

 Dictyophorus of Thunberg has precedence in date, its restoration must be 

 acquiesced in. 



The Lopliacris of Scudder is included under his Titanacris, which the 

 author distinguishes from Tropidacris chiefly by the venation of the elytra 

 and form of the genital plate of the male; being entire in the former and 

 eniarginate in the latter. 



At this point, a new genus (Hermistria) is introduced, founded on a 

 species from Mexico. This and the other new North American species men- 

 tioned will be noticed in this paper at the proper places. 



The change which, if followed, will produce greatest confusion in our 

 American nomenclature is that in reference to the caloptenoid species. He 

 holds, as I learn by letter from Dr. Brunner de Wattenwyl, that we have 

 no Calopteni in North America ; all our species, being referable to Pezotettix. 

 Serville's name (CalUptamus) is amended and retained as CalUptenus. The 

 chief distinctions given by the author between this genus and Pezotettix are 

 as follows : 



In CalUptenus, the elytra destitute of the intercalate vein ; the pos- 

 terior femora broad and distinctly serrate above ; the posterior sulcus of the 

 pronotum in the middle or before the middle. 



In Pezotettix, the elytra abbreviated or rudimentary, and furnished with 

 an intercalate vein ; posterior femora having the upper margin entire and 

 unarmed ; posterior sulcus of the pronotum sometimes situated behind the 

 middle. 



His numerous divisions of these restricted genera into siibgenera show 

 clearly the difficulty experienced in attempting to obtain a satisfactory 



