172 PROCEEDINGS OF THE NATIONAL MUSEUM vol.85 



Females pale sordid yellow mottled and marked Avith brown to 

 fuscous. JMales similarly colored, but usually with more extensive 

 fuscous markings, sometimes almost wholly fuscous except for veins 

 of fore wings, which are either unmarked or irregularly marked with 

 fuscous. 



Anterolateral margins of crown nearly straight. Crown of female 

 about one and one-half times as long as pronotum, that of male only 

 slightly longer than pronotum. Venation of fore wing of male 

 irregular; outer anteapical cell absent, central anteapical cell open 

 basally, inner anteapical cell either open or closed basally; costal 

 area with a few irregular veins from radius to costal margin in 

 region of anteapical cells. Fore wing of female obliquely sub- 

 truncate, reaching to third abdominal segment. 



Seventh sternite of female long, posterior margin produced and 

 with a faint median notch. Male plates slender, diverging apically, 

 slightly narrowed between base and middle. 



Pygofer processes of male rather slender and sharply pointed 

 distally. Aedeagus rather slender, bearing at the tip a pair of sinu- 

 ately curved processes, which extend down along the shaft of the 

 aedeagus and are coarsely and irregularly serrate on the outer 

 margins. Styles slender, pointed distally. 



Distribution. — Originally described from seven specimens from 

 northern Colorado, the specific localities mentioned being Fort Collins 

 and Cameron Pass. One of these, a male from Rabbit Ears Pass, 

 bears Baker's determination label and is considered to be the type. 

 In addition to the type series, I have examined specimens from Little 

 Beaver, Colo. (Ball), Soldier Creek, Utah (Knowlton), and Fish 

 Lake Mountain near Richfield, Utah (no collector), 



ERRHOMUS (ERRHOMUS) LINEATUS (Baker) 



Plate 6, Figurjcs 8, SA 

 Errlxomenns Iwcatus Baker, I'syche, vol. 8, p. 2G1, 1S9S. 



Superficially identical with montanus but with head slightly shorter 

 and blunter and the processes of the aedeagus not serrate. Males 

 macropterous. Length of female 7.25-8 mm, of male 6-7 mm. 



Color as in montanus but with less mottling and more distinct 

 spots. Structure about as in montanus except as noted. Seventh 

 sternite of female with posterior margin very shallowly incised. 

 Male plates as in montanus. 



Pygofer processes of male similar to those of montanus but not so 

 sharply pointed. Distal portion of aedeagus composed of two parts, 

 a stout, curved dorsal portion without terminal processes, and a 

 slender, curved, ventral portion which carries the ejaculatory duct 

 and terminates in a pair of slender, fingerlike processes. 



I 



