152 NEW NORTH AMERICAN MELANOPLI (oRTHOPTERA) 



Agrees fully with a paratype of mimica before us except in the following 

 features. Size small, (averaging) decidedly smaller than mimica, but appre- 

 ciably larger than P. latifurcula, here described. Form moderately robust. ''^ 

 Interspace between mesosternal lobes subquadrate.^' Furcula represented by 

 twin, slightly swollen adjacent processes, which project beyond the margin of 

 the segment less than (rarely in the series varying to fullyj half the basal 

 width of one of these. Supra-anal plate with lateral margins feebly conver- 

 gent and rather strongly convex in proximal two-thirds and elevated, plate 

 there decidedly (rarely in the series weakly) constricted, the distal third con- 

 sequently small, triangular with lateral margins convergent and feebly convex 

 to the acute apex, bearing in this portion a medio-longitudinal sulcus. Cerci 

 simple, slender, acute conical, about two-thirds as long as supra-anal plate. 

 Caudal margin of pronotum, pallium, subgenital plate and prosternal spine as 

 in mimica. 



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

 Similar in every way to females of mimica except for the (average) decidedly 

 smaller size and (average) shghtly more robust form, which causes the caudal 

 femora to be shorter and slightly heavier. Prosternal spine moderately heavy 

 with apex rather sharply rounded (in the series the apex is seen to vary some- 

 what in form and when more nearly acute is often slightly flexed cephalad). 

 Interspace between the mesosternal lobes shghtly longer than broad (varying 

 in the series to distinctly longer than broad). 



Measurements {in millimeters) 



Type. 

 Paraiypes (18). 



9 

 Allotype. 

 Paratypes (28). 



The variation shown by the Lyford series is not exceeded in any of the addi- 

 tional material at hand. 



Coloration. — No noteworthy differences from mimica are apparent in colora- 

 tion. As in that species, two color forms, green and brown, occur; in the 

 present series in about equal numbers, while in the Laredo series a condition 

 about intermediate, pale yellowish with a green tinge, is found. The intensi- 

 fication and recession of the color pattern is shown by the series to be consid- 

 erable. Nearly all the brown females and a number of the green phase have 

 the color pattern fully as marked as in the male sex, in this feature apparently 

 differing from the usual condition found in latifurcula. 



" When the series at hand are placed beside each other, those of the present 

 species appear shghtly more robust than those of mimica and slightly less 

 robust than those of latifurcula. The difference is, however, not sufficient to 

 be of any value for individual comparisons. 



1' This feature varies in the present species. See page 150, footnote 9. 



