166 NEW NORTH AMERICAN MELANOPLI (oRTHOPTERA) 



Specimens Examined: 15; 6 males and 9 females. 

 Utah: Milford. 



Nevada: Crestline and Caliente in Lincoln County (material from the latter 

 locality somewhat atypical). 



A series from Milford, of one male taken September 18, 1908, 

 by J. C. Bradley and five females bearing the same data as the 

 type and allotype, are designated paratypes. All but the speci- 

 men referred to above were taken by Rehn and Hebard between 

 September 3 and 5, 1909. 



The species was found very scarce in weedy areas of valley 

 bottoms at Milford and Cahente, particularly in a yellow-flowered, 

 feathery, green plant of the daisy family, growing solidly waist- 

 high over large areas. Every effort was made to secure a good 

 representation, the material being obtained by long and contin- 

 uous beating. Earlier in the season the insect is probably more 

 numerous. 



ARGIACRIS-7 new genus 



This monotypic genus is placed after Asenioplus and before 

 Bradynotes in linear arrangement. In general appearance closest 

 resemblance is found to Bradynotes, but from that genus it is 

 readily separated by the pronotum which has the disk distinct 

 from the lateral lobes, but showing no acute marginal carina on 

 each side and the caudal margin obtuse-angulate produced, by 

 the presence of very broadly lanceolate tegmina, and, in the 

 female, by the f ulh' exposed ovipositor valves. In this last feature 

 it agrees rather with Asenioplus. Though the produced caudal 

 margin of the pronotum distinguishes this genus from the genera 

 following Melanoplus, viz. — Dendrotettix, Podisma, Asenioplus 

 and Bradynotes, the general character of its robust structure, 

 broad vertex, small eyes and general character of male genitalia 

 show that it belongs with these genera and not with Melanoplus 

 and allied genera. 



Genotype. — Argiacris rehni new species. 



Generic Characters. — Form verj^ stout. Head as in Bradynotes. 

 Interocular space wide; vertex blunt; eyes small, very much 

 shorter than cheeks. Pronotum with disk rounding rather 

 broadl}^ into lateral lobes, caudal margin obtuse-angulate pro- 

 duced. Abbreviate but broad tegmina present. Male genitalia 



"From dp7t6y=slow and dKpis=grasshopper. 



