82 PROCEEDINGS OF THE NATIONAL MUSEUM vol, no 



the Riley collection, as recorded by Scudder, suggests that it was 

 taken while on a Federal assignment such as the one in 1890. 



M. borealis utahensis, considered by Hebard (1928, p. 281) probably 

 to be a distinct species closely related to M. hruneri, is shown by the 

 aedeagus to belong instead to the borealis line of development. 



Descriptive notes: A nearly fully winged subspecies of medium to 

 large size in relation to other subspecies. Characterized especially in 

 the male by the posteriorly prolonged (as well as elevated) subgenital 

 plate. Tegmina failing by about 2 to 3 mm. to reach the tips of 

 hind femora and the end of the abdomen. Posterior third of abdomen 

 strongly upturned. 



Male genitalia: Cercus typically as in figure 8,6-1-2, sometimes 

 with the apex more obliquely rounded (fig. 8,b-3) ; furculae broad, in 

 hoiotype about as in figure 9,6-1, sometimes more tapering; subgenital 

 plate in lateral view extremely prolonged, somewhat variable in 

 shape (fig. 16,/), in posterior view with dorsal margin varying from 

 twice emarginate (fig. ll,e-l-3) to entire. Aedeagus as in borealis 

 borealis; epiphallus (fig. 8,g) with lophi somewhat oblique anteriorly 

 in dorsal view, in lateral view (fig. 10,e) rather flattened anteriorly. 



Female genitalia: Cercus about as in borealis borealis (fig. 10,Z); 

 ovipositor essentially as in b. borealis except that "scoop" of dorsal 

 valve averages slightly more excavate, with apex more upturned. 



Coloration: Type with narrow yellowish green longitudinal stripes 

 on lateral carinae of pronotum, lower half of lateral lobe of pronotum 

 and lower part of head similar; metepisternal stripe conspicuously 

 yellowish; tegmen brown, unmarked; hind femur with external 

 paginal area light brown, paler toward base, dorsal surface with 

 three distinct dark bars, in addition to dark brown knee, external 

 surface ventrad of paginae pink, mesal surface tinged with pink; 

 hind tibia pink. Specimens from Big Cottonwood Canyon lighter- 

 colored than type, tegmina and dorsum of pronotum light brown, 

 most of remainder of body yellowish brown, hind tibia weak pinkish. 



Variation: Measurements (in millimeters) of the holotype are: 

 Body, 27.0 (Scudder's measurement) ; pronotum, 6.1 ; hind femur, 14.3; 

 and tegmen, 17.0 Specimens from Ogden average larger than those 

 from Big Cottonwood Canyon. Measurements of the Ogden speci- 

 mens are: Males (2), pronotum, 5.3, 5.5 (av. 5.4), hind femur, 12.0, 

 12.0 (av. 12.0), tegmen, 15.3, 18.8 (av. 17.1); females (2), pronotum, 

 5.7, 6.0 (av. 5.9), hind femur, 13.7, 14.7 (av. 14.2), tegmen, 12.5, 

 15.5 (av. 14.0). Measurements of representative Cottonwood Canj^on 

 specimens are: Males (3), pronotum, 4.6 to 5.0 (av. 4.8), hind 

 femur, 11.4 to 11.6 (av. 11.5), tegmen, 11.3 to 11.8 (av. 11.5); females 

 (2), pronotum, 5.1, 5.3 (av. 5.2), hind femur, 12.4, 12.5 (av. 12.5), 

 tegmen, 12.3, 12.5 (av. 12.4). 



