8 PROCEEDINGS OF THE NATIONAL MUSEUM V0L.no 



Cercus (figs. 7,j; 8,a-e) usually less slender than above; subgenital plate most 

 often without twin apices (fig. 11, b-f) ; apex of aedeagus scarcely extending 

 dorsally beyond base of dorsal valve (fig. 3,j); dorsal valve extending 

 primarily anteriorly, with a lateral twist. (Distribution: figs. 17, 18) . . 8 



8. Tegmina covering about one-half of abdomen (pi. 5,e,f). (Occurs at very 



high altitudes; distribution: fig. 18). . . borealis stupefactus (Scudder) 

 Tegmina covering more than one-half of abdomen 9 



9. Subgenital plate with scarcely any or comparatively little dorsal or posterior 



development of the apex (fig. lQ,d). (Distribution: figs. 17, 18). 



borealis borealis (Fieber) 

 Subgenital plate with considerable dorsal or posterior development of the 



apex (fig. 16,e-g) 10 



10. Subgenital plate (fig. 16,/; pi. 4,b) with apex conspicuously produced poste- 

 riorly. (Distribution: fig. 18) borealis utahensis Scudder 



Subgenital plate (fig. 16,e) produced dorsally more than posteriorly. (Ab- 

 domen often conspicuously recurved as in pi. 4,d.) (Distribution: fig. 18.) 



borealis palaceus Fulton 



Melanoplus mexicanus (Saussure) 



Figures 2,c; 3,6; 4; 6; 7,a; 10,f,q; Plate 1,a 



Pezotettix mexicana Saussure, Rev. Mag. Zool., ser. 2, vol. 13, p. 160, 1861 (male, 

 female, Temperate Mexico). Lectotype, here designated: Male labeled 

 "Cordova, t. c." (printed), a separate green label "Melanoplus mexicanus 

 Sauss." (apparentlj' in Saussure's longhand). (Museum d'Histoire Naturelle, 

 Geneva, Switzerland.) 



Caloptenus selectus Walker, Catalogue of the specimens of Dermaptera Saltatoria 

 in the collection of the British Museum, pt. 4, p. 682, 1879 (female, Oajaca 

 (sic), Mexico). Lectotype, one of two females, selected by Uvarov (1925, p. 

 298). 



The condition of the lectotype of mexicanus is good, with all ap- 

 pendages except antennae, right middle leg, and left hind tibia present. 

 It is not an alcoholic specimen, and color is well preserved. Dark 

 dorsal bands on hind femora are well developed, also the pale area of 

 the lower third of the outer paginal area and the pink ventral surface. 

 The hind tibia is deep pink. The aedeagus (dry on specimen) is typical 

 of the species as shown by the series examined. The cercus is some- 

 what less robust than the one from Bledos, Mexico, illustrated (fig. 

 7,a-l) . The mesosternal hump is well developed. 



Charles Ferriere, curator of entomology at the Museum of Natural 

 History in Geneva, has located 16 specimens (6 males, 10 females) of 

 the original series of mexicanus. He kindly loaned 8 specimens, all 

 bearing green name labels like that above. One female has the same 

 locality label as the lectotype. Two females bear "Orizaba, Sumi- 

 chrast," and one female "Orizaba, M. H. de Saussure." Two males 

 without locaUty labels and one female "Orizaba, reg. temp. Sumi- 

 chrast" prove to be M. jemur-ruhrum (De Geer), showing that the 

 original series was a mixed one. 



