376 NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



Melanoplus lemhiensis new species (PL XXVI, figs. 3, 4 and 5; 



pi. XXVII, fig. 5) 



This insect is generally very similar to artemisiae, differing as 

 noted above. These species and salmonis here described have 

 the dark postocular band often solid in males, broken by a small 

 pale fleck in females; never as broad or as sharply defined as in 

 montanus (Thomas). 



Type. — cf ; Cow Creek, Lemhi Range, near Salmon River, 

 Idaho. Elevation 4300 to 4400 feet. August 13, 1928. (Rehn 

 and Hebard). [Hebard Collection, Type no. 1260]. 



Agrees very closely with salmonis here described in size, form, 

 pronotum, general coloration and color pattern. Vertex slightly 

 narrower. Frontal costa showing impression only in immediate 

 vicinity of median ocellus. Eye deeper than in salmonis, about 

 one and four-fifths times length of infra-ocular sulcus. Tegmina 

 very short, considerably shorter than pronotum, feebly over- 

 lapping, distad rounding to a (normally) weak emargination at 

 juncture of dorsal and lateral fields, 14 the apex in dorsal field 

 rounded angulate produced. Furcula represented by two very 

 small processes springing from the tergite without convexities 

 preceding them, the projecting portion blunt triangular (varying 

 to rounded quadrate) and very slightly (to distinctly) longer than 

 its basal width. Supra-anal plate triangularly shield-shaped, 

 longer than proximal width, surface moderately specialized, 

 medio-longitudinal sulcus deep in proximal three-fifths (thence 

 varying from weak to obsolete). Cercus small, about twice as 

 long as proximal width, proximal portion (slightly less than half 

 of cercus) scarcely narrowing, subquadrate, slightly deeper than 

 long; distal portion flattened, bent inward and upward, its outer 

 surfaces weakly concave, its dorsal and ventral margins very 

 weakly convergent and very weakly convex, the disto-dorsal 

 angle broadly rounded, the disto-ventral angle very broadly 

 rounded; apices approaching each other and briefly separated 

 just before apex of supra-anal plate. Subgenital plate with a 

 small blunt subapical tubercle. Penis much broader but of same 

 general type as that of artemisiae (see plate XXVI, figure 4). 



Allotype. — 9 ; same data as type. [Hebard Collection]. 

 Agrees with type except as follows. Size much larger, form 

 much more robust though not as robust as in this sex of salmonis. 



14 This is rarely very weakly indicated in artemisiae. It is a condition 

 which never occurs in the great majority of the brachypterous species of 

 Melanoplus. 



