408 



and tips of patagia. Legs white ; fore and mid femora and tibiae with blackish- 

 brown stripes and without tufts; tarsi and hind legs touched with blackish 

 brown at tips of joints and more or less suffused with brownish gray. Abdomen 

 gray brown with a few white scales. Above it is marked with two white 

 stripes which contain a pair of diverging black streaks on each segment. In 

 the posterior half of the abdomen the bases of each pair of streaks are con- 

 nected by a broad dorsal dash in the posterior margin of the preceding seg- 

 ment. There are also some blackish lateral dashes and two pale ventral stripes. 



Primaries clothed with mixed white and brownish gray scales and more 

 or less sprinkled with black. They are more or less whitish basad and along 

 inner margin of first lobe, and have a few whitish streaks near the inner mar- 

 gin and in the second lobe. There is a small dark dot, sometimes scarcely 

 evident, near middle of cell, and a spot before cleft. The latter is usually 

 scarcely more than a curved transverse shade, sharply limited outwardly by 

 whitish or light gray scales at base of cleft. Costa with a heavy blackish dash 

 over base of cleft and shaded with black in basal half. Costa of first lobe with 

 two black dots, opposite which there are whitish areas in the fringes. There 

 is a pale brown subcostal line which reaches the costa in white patches before 

 and after the black costal dash, fades out toward base of wing, and forks 

 in the first lobe, the two branches fading out near the middle of the lobe. 

 Between them is usually a blackish dash. Apex of first lobe and inner margin 

 before apex with black dots. Tips of veins in second lobe touched with black. 

 Fringes brownish gray, on the second lobe cut with white at tips of veins, at 

 least toward apex. On the first lobe they are white from the preapical dot 

 on the inner margin to the apex, with a few dark basal scales. Secondaries 

 and their fringes brownish gray. Expanse 20-27 mm. 



Described from fourteen Arizona specimens. 



Holotype $, allotype and four paratypes 2 from Mohave Co., Aug. and 

 Sept., two paratypes S and one 9, Yavapai Co., and one paratype 2 eacli 

 from Redington and Paradise, May, in coll. Barnes. 



Paratypes 5 and 2, Mohave Co., Sept., U. S. N. M. No. 23474. 



Paratype 2 , Mohave Co., Sept., in coll. Meyrick. 



This beautiful species is unlike an)' other known to us, and may 

 be recognized very easily by the abdominal markings and the subcostal 

 stripe on the primaries. 



The life history is unknown. 



26. OlDAEMATOrHORUS MEDIUS n. sp. PI. XLVII, fig. 1. PI. LII, 



fig. 4. 



Head brownish, creamy white between antennae. Antennae pale above, 

 dotted with brown. Palpi small, slender, oblique, whitish; third joint and tip 

 of second touched with brown. Thorax whitish with light brown band across 

 tips of patagia. Abdomen gray brown with white scales, whiter above toward 

 base, and on posterior margins of segments, which are also marked with single 

 dorsal brown dots. Fore and mid tibiae with brown stripes and faint indica- 



