76 



Journal New York Entomological Society, tvoi. xxiv, 



Measurements (in Millimeters. )i 



Males: 



Jordan, Montana . . . 



Uva, Wyoming 



Cedar, Colorado. . . . 



Claudell, New Mexico 



Salt Lake City, Utah. 



Soldiers Home, Cal.. . 



*Prescott, Arizona . . . 

 Females: 



Gebo, Montana 



Worland, Wyoming. . 



Ogden, Utah 



Juarez, Mexico 



Reno, Nevada 



Sierra Madre, Cal.. . . 



*Wyoming2 



*Yakima, Washington 



*Claremont, Cal 



Width 



of 

 Head. 



II. 8 



12. 5 



11-3 



13-4 



7 



II 



10 



11. 1 



12.3 

 10.2 



11. 2 



8.3 

 8.6 

 8.7 



Width 



Be- 

 tween 

 Eyes. 



7-7 

 7-9 



7.8 

 7-6 

 7-9 

 4.1 



7 



6.6 



7-1 



8 



6.7 



6.7 



5-2 



S-i 



5-2 



Length 



of 



Pro- 



7-7 

 7-7 

 7-1 

 8.3 

 7-7 

 9.6 

 5.2 



7.2 



6.8 



7.6 



8.6 



7-4 



8.7 



6 



6.6 



6.3 



Width Length j Length 

 of of of 



Pro- Caudal j Caudal 

 notum. Femur. Tibia 



II. 2 

 10.3 

 10.7 

 12.2 

 10.7 

 12.6 



6.8 



10.2 

 9.7 



II. 2 



12. 1 

 9.4 



10.7 



14.9 



13.7 

 12. S 

 13.8 



13-7 

 16 

 II. 7 



12.8 

 12.2 



13.3 



14.7 



12.8 



14.2 



10.9 



12 



11.4 



13. 1 

 12.7 

 12. 1 

 12.5 

 12.6 

 13-8 

 10.7 



12 



II. 4 



12.2 



13.2 



II. 8 



12.7 



10 



10.3 



10 



Longest Length 

 Tibial I ( audal 

 Spur. Meta- 



3-7 



4.1 



4 



4-3 



4.1 



4.2 



3-1 



3-6 



3.3 



3.2 



3-6 



3.1 



3.2 



3 



3-1 



2.3 



4.4 

 4.1 

 4.6 

 4.7 

 4.8 

 4.1 



4.2 



4 



4 



4.1 



4.1 



4.2 



3.6 



3-8 



3-2 



The specimens marked with an asterisk in the instars are preced- 

 ing maturity. 



Coloration.. — Head, pronotum, underparts and limbs warm buff, in 

 many individuals suffused with ochraceous to differing degrees ; the 

 head often showing a more brownish-yellow coloring, a few very 

 narrow and widely separated darker lines rarely indicated on the 

 occiput. Abdomen shining blackish brown above, the caudal margins 

 of the segments narrowly of the general warm buff coloration. In 

 immature individuals, particularly those of deeper coloration, these 

 bands are greatly reduced and are indistinguishable in several speci- 

 mens before us which have shrivelled much in drying; on such speci- 

 mens the description of fnsciis was based. 



Distribution. — Known northern limits from Jordan, Montana, 

 westward to Yakima, Washington, and Drain, Oregon. The known 

 limits of eastern distribution are Boxbutte County, and southwestern 

 Nebraska; Claudell, New Mexico; El Paso, Texas, and Juarez, Mex- 

 ico. In the latter country the extent of the species distribution is yet 

 conjectural, though probably covering at least the greater portion of 

 the northern plateau. 



1 We omit the body length, as the softness of the abdomen in the present 

 genus precludes the possibility of accurate measurement. 



2 This specimen is one of the types of S. fasciatus of Thomas. 



