78 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



Melanoplus borealis palaceus Fulton 



Figures 8,a; 10,t; ll,d; 16,e; 18; Plate 4,d, 



Melanoplus borealis palaceus Fulton, Ann. Ent. Soc. Amer., vol. 23, pp. 619-620, 

 fig. 1,F-H, 1930 (5 males, 8 females, Upper Klamath Marsh, Oreg.). The 

 holotype male and allotype female were designated by Fulton (USNM). 



Descriptive notes: A usually fully winged subspecies, averaging 

 slightly larger than borealis borealis, moderately larger than b. 

 stwpef actus , and slightly smaller than b. utahensis. Characterized 

 especially in the male by the strongly upturned and recurved apical 

 third of the abdomen, and by the subgenital plate which apically is 

 considerably produced dorsally though only moderately produced 

 posteriorly. Male tegmina usually reaching about to apex of 

 abdomen and apices of hind femora, sometimes a little shorter; female 

 tegmina averaging a little shorter, rarely slightly exceeding hind 

 femora. 



Male genitalia: Cercus usually as in figure 8,a-2, somewhat 

 variable (fig. 8,a-3,4), and in holotype (fig. 8,a-l) its lateroposterior 

 margin rather irregular; supra-anal plate and furculae of holotype 

 and of most specimens much as in figure 9,^, in a few specimens the 

 furculae somewhat shorter and less widely separated at their apices; 

 subgenital plate in lateral view (fig. 16,e) somewhat variable, the 

 apical portion of dorsal margin much elevated, in posterior view the 

 dorsal margin (fig. ll,c^) usually entire, sometimes with traces of 

 emargination, rarely with a median depression creating twin knobs, 

 the posterior surface of subgenital plate usually with a roughly rec- 

 tangular vertical area which is sometimes weakly excavate (x of fig. 

 ll,d-5); one paratype (Univ. Michigan) with subgenital plate less 

 elevated and with rectangular area of posterior surface less well 

 defined than in holotype. Aedeagus essentially as in borealis borealis; 

 epiphallus in dorsal view usually about as in figure 8,/, in holotype 

 the apices of lophi somewhat more lanceolate, in lateral view lophus 

 usually noticeably flattened at top near apex, much as in figure 10,6. 



Female genitalia: About as in borealis borealis; cercus of allotype 

 essentially like figure 10,Z, in some specimens slightly more acute; 

 dorsal ovipositor valve with "scoop" of allotype (fig. 10,i) and several 

 other specimens more deeply excavate than usual in b. borealis, but in 

 other females not clearly different, margins of "scoop" slightly irregu- 

 lar, seldom with a deep notch as in allotype. 



Variation: The size of seven representative males, measured in 

 millimeters, varies in pronotal length from 4.2 to 4.8 (av. 4.5), in 

 length of hind femur from 10.8 to 11.7 (av. 11.2), and in length of 

 tegmen from 11.0 to 14.5 (av. 12.6). Seven measured females vary 

 in pronotal length from 4.9 to 5.9 (av. 5.3), in length of hind femur 



