21 



of cell, 5 (M^) from above angle, 6 (M^) from upper angle, 9 (R3) from 10 

 (Rj) anastomosing with 8 (R^) and 7 (R^) to form the areole, 11 (R,) from 

 cell. Secondaries: veins 3 and 4 (Cu^ and Mg) from angle of cell, S (M^) 

 from slightly below middle of the discocellulars, almost fully developed, 6, 7, 

 (M^, R) stalked from upper angle. 



Genitalia : a paired, heavily chitenized organ arising from the dorso-caudal 

 margin of the valves, present, extending to near the base of the uncus and sup- 

 porting the aedoeagus. This may be a part of the anellus or juxta. Penis bear- 

 ing at least some heavy spines, (cornuti of Pierce). Uncus with the tip some- 

 what broadened; but not spoon-shaped; bearing a spine on or near the end. 



Key to the Species of the Genus Neogrotella 



Ground color of primaries some shade of cream with no 

 maculation except for the t. a. and t. p. lines which are 

 often obsolete; fringes never checkered, concolorous with, 

 or lighter than, the primaries, immaculate. 

 I. Expanse 24-26 mm. ; fore tibia with about 1 claw and 5 spines 

 on the inner side, and 1 claw and 4 spines on the outer — 



Colorado confusa 



II. Expanse 22-23 mm.; fore tibia with about 1 short spine-like 

 claw and three spines on the inner side, and 1 claw-like spine 



and 4 spines on the outer — Utah spauldingi 



Ground color of primaries extremely variable, ranging 

 from cream thru olive to blackish gray; often with some 

 maculation besides t. a. and t. p. lines, i. e., a trace of 

 the reniform or s. t. showing; fringes usually checkered, 

 or at least not immaculate except in pale specimens. 

 III. Expanse 18-21 mm. ; fore tibia with about 1 claw and 4 spines 

 on the inner side and 1 claw and 4 spines on the outer — South- 

 ern California mcdunnoughi 



Neogrotella confusa, sp. nov. (fig, 14). 



Front as in spauldingi. Fore tibia with about one claw and five spines on 

 the inner side and one claw and four spines on the outer. Mid tibia missing in 

 the three specimens before the authors. Hind tibia unspined (?). 



Head, collar, thorax, abdomen and primaries concolorously cream. Traces 

 of black spots, as in parvipuncta. Some smoky color showing thru the cream 

 where rubbed. Fringes very slightly paler, unmarked. Secondaries almost uni- 

 colorously smoky-fuscous. Fringes contrastingly pure cream-white. Beneath : 

 primaries, smoky fuscous edged with paler along costa, outer and inner margins, 

 the veins slightly darker. Fringe nearly pure white, immaculate. Secondaries 

 and their fringes concolorously nearly pure white, with a very faint cream tinge. 



Expanse: 24-26 mm. (Larger than spauldingi.) 



