14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



As mentioned under the respective subspecies, the occurrence of 

 two annual generations has been reported for hilituratus defectus, 

 and evidence suggesting two generations or a partial second genera- 

 tion has been presented for hilituratus vulturnus and typical hilituratus. 

 In some cases the evidence consists of a second peak of adult abun- 

 dance during a year. In recent years several important discoveries have 

 been made concerning diapause in the eggs of grasshoppers, as re- 

 viewed by Lees (1955, pp. 7, 46, 68, 127). Further studies may 

 disclose that the subspecies of hilituratus differ with respect to dia- 

 pause. 



Entomologists frequently have had difficulty distinguishing be- 

 tween the females of hilituratus (in the past usually called mexicanus 

 or atlanis) and jemur-ruhrum. With a little practice it usually is a 

 simple matter to separate them by the cerci (fig. l,6,c), which are 

 much more slender and apicaUy acute va. jemur-ruhrum. 



Melanoplus hilituratus hilituratus (Walker) 



Figures l,b,d-2; 2,e,f; Z,e,m; 5; 6; 7,f,g,l; 8,j,m; 9,g; 10,g,n; Plate 1,b,c. 



Caloptenus hilituratus Walker, Cat. Derm. Salt. B. M., pt. 4, p. 679, 1870 (male, 

 female, Vancouver Island, Canada; not 2 females, see Uvarov, 1925, p. 298). 

 Lectotype, designated by Uvarov (1925, p. 298): Male from Vancouver 

 Island (BM). 



Caloptenus scriptus Walker, Cat. Derm. Salt. B. M., pt. 4, p. 680, 1870 (females, 

 Vancouver Island, Canada). Lectotype, designated by Uvarov (1925, p. 

 298): Female from Vancouver Island (BM). 



Caloptenus arcticus Walker, Cat. Derm. Salt. B. M., pt. 4, p. 681, 1870 (one female, 

 "Arctic America. Presented by Dr. Rae"). New synonymy. 



Caloptenus atlanis Riley, Seventh Ann. Rep. Nox. Benef. Ins. Missouri, p. 169, 

 1875 (males, females, Boscawen, Merrimack Co., N. H.). New synonymy. 

 Lectotype, here designated: Male labeled "N. H., type no. 1153, U. S. N. M., 

 Type, Caloptenus Atlanis Riley" (USNM). 



Melanoplus atlanis, var. coeruleipes Cockerell, Entomologist, vol. 21, p. 301, 

 1888 (near Templar Rock, Custer Co., Colo.). New synonymy. 



Melanoplus affinis Scudder, Proc. Amer. Philos. Soc, vol. 36 (154), pp. 20, 32, 

 1897; Proc. U. S. Nat. Mus., vol. 20, pp. 132, 171-172, pi. 12, fig. 2, 1897. 

 (See Hebard, 1917, footnote, p. 251.) (Males, females, 8 localities in Utah, 

 Wyoming, Washington, and British Columbia.) New synonymy. Lectotype, 

 designated by Rehn and Hebard (1912, p. 79) : Male from Salt Lake Valley, 

 Utah (ANSP). 



Melanoplus angelicus Scudder, Proc. Amer. Philos. Soc, vol. 36 (154), pp. 22, 32, 

 1897; Proc. U. S. Nat. Mus., vol. 20, pp. 133, 202-203, pi. 13, fig. 10, 1897 

 (2 males, Los Angeles, Calif.). New synonymy. Lectotype, designated by 

 Rehn and Hebard (1912, p. 80): Male from Los Angeles, Calif. (USNM). 



Melanoplus intermedius Scudder, Proc. Amer. Philos. Soc, vol. 36 (154), pp. 20, 

 32, 1897; Proc U. S. Nat. Mus., vol. 20, pp. 132, 172-174, pi. 12, figs. 3, 4, 

 1897 (males, females, 5 locaHties in Colorado, Montana, Wyoming, Idaho, 

 and Washington). New synonymy. Lectotype, designated by Rehn and 

 Hebard (1912, p. 79): Male from YeUowstone, Mont. (ANSP). 



