23 



Front as in G. spauldingi. Tibiae also similar, but the armature of the fore 

 tibia is slightly different. There is a claw on the inner side with four very fine 

 spines, above ; and a claw on the outer, with four fine spines above. The entire 

 armature is somewhat less heavy than in spauldingi. 



Head, collar, thorax, abdomen, and ground color of the primaries concol- 

 orous, but extremely variable. The ground color ranges from the cream color 

 of spauldingi, thru olive to blackish-gray. T. a., t. p., and s. t. lines present or 

 absent; when present, blackish; the t. a. and t. p. lines often punctiform, with a 

 course as in spauldingi. S. t. line as a shade, rather than as a clearcut line ; not 

 present in spauldingi. When present in mcdunnoughi very irregular from costa 

 to inner margin, produced to points in radial and medial regions. Reniform 

 present or absent; when present, pale, contrasting with the ground color, which 

 is frequently heavily covered by a dusting of black scales. The fringe usually 

 checkered, the checkering obsolescent in the very pale specimens. Secondaries : 

 some shade of smoky to blackish-fuscous. Fringe somewhat lighter, interlined 

 with darker, the interline being frequently broken and causing a checkered ap- 

 pearance. Beneath: primaries, some shade of smoky or fuscous; the costal, 

 outer and inner margins paler. Fringe usually showing at least some trace of 

 checkering, even if this is not visible on the upper side. Secondaries : uniformly 

 pale cream, the fringe usually concolorous. In the darker specimens there is 

 some black powdering of scales present on the wing surface and a trace of an 

 interline on the fringe. 



Expanse: 18-21 mm. (Slightly smaller than spauldingi.) 



Genitalia: very similar to spauldingi; the uncus subcylindrical with a very 

 slight broadening toward the tip ; the spine present and almost apical ; the vin- 

 culum somewhat longer and more tapered, the point rounded ; the tegumen ap- 

 proximately the same in both species; apparently fewer spines on the penis; 

 the valves slightly less modified, and only about seven-eights as long, besides 

 being of slightly different shape as may be seen from the figure. The genitalia 

 of a number of specimens of mcdunnoughi can be made to exactly superimpose 

 upon one another. 



Apparently a very "close" species to spauldingi, but constant genitalically 

 and very variable in color and maculation, scarcely any two specimens in a long 

 series being identical ; whereas spauldingi, which appears confined to Utah, varies 

 but little in color, and only in the strength of the t. a. and t. p. lines in macula- 

 tion. 



This species is in the Barnes Collection from Olancha, Inya Co., 

 Calif., April 24-30, May 1-7, 8-15, June 8-15, 24-30; Palm Springs, 

 Riverside Co., Calif., March 16-23, April 16-23 ; and from Dixieland, 

 Imperial Co., CaHf., March 1st to May 15th. 



Type locality: Dixieland, Calif.; O. C. Poling, Collector, all 1922. 



Number and sexes of types: $ Holotype, and 9 Allotype, March 1-15. 

 91 $,33 9 Paratypes, as follows: 22 $'s, \ 9, March 1-15; 50 ^'s, 25 $'s, 

 March 15-30; 5 S's, April 1-15; 14 $'s, 7 9 's, April 15-30. 



