WM. G. DIETZ, M.D. 59 



nounced in costal part of wing, and least along the middle of the disc, 

 on the costa near the base is a dark fuscous patch, from which extend 

 a transverse spot to the fold, the remainder of the basal space is thinly 

 speckled with pale fuscous, at one-third is a nearly straight fuscous 

 fascia, rather broad but not sharply defined externally, within this 

 fascia and on the fold is a darker spot, another more distinct spot im- 

 mediately beyond the fascia and a little nearer the costa, another elon- 

 gate spot beyond the middle and a little above the fold, at the end of 

 the cell are two somewhat coalescent spots, from each of these a dark 

 shade extends to respectively the costal and dorsal margins ; cilia 

 grayish-white. Hindwings about as wide as the forewings, acutely 

 pointed, costa scarcely retuse outwardly, whitish, lightly dusted with 

 fuscous, with some lustre ; cilia a trifle over 1, pale gray with pale 

 yellowish sheen. Abdomen grayish -fuscous, anal tuft ochreous. 

 Underside of body silvery white, shining, abdomen suffused with fus- 

 cous. Legs white, anterior thickly suffused with fuscous, middle and 

 posterior, especially the latter, much less so, oblique spot and apices 

 of posterior tibia? and apices of tarsal joints pale. Expanse 16.0-21.0 

 mm., 0.64-0.84 inch. 



Hab. — Ariz. (Williams, Phoenix). 



Four specimens, two males and two females, are before 

 me. Three of these in the Nat. Mus. Coll. from Williams, 

 Ariz., measure 16.0 mm., or a trifle over, while the fourth, a 

 female from Phoenix, in my collection, measures 21.0 mm., 

 but aside from its larger size and more pronounced mark- 

 ings, it does not differ. The transverse costal spot near 

 the base and the two distinct spots in the mesial space, dis- 

 tinguish this species from any other. Stem of veins 3 + 4 

 of hindwing about half the length of vein 4, 5 connate with 

 stem. A specimen from Vowell's Mill, La., and another 

 from Alabama (without locality) in my collection, may be- 

 long here ; their markings, however, are indistinct, and do 

 not permit a definite opinion. Two other specimens from 

 Williams, Ariz., also in the Nat. Mus. Coll. measure only 

 14.0 mm., and do not have the basal space paler as in the 

 typical form. 



37. H. nrsella Wish.— "Antennas with pecten, but without notch ; 

 pale brownish-ochreous. Palpi brownish-gray externally, dirty whitish 

 on their inner sides. Head and thorax bone-whitish, the latter tinged 

 brownish-gray anteriorly. Forewings bone-white, much suffused and 

 sprinkled with brownish-gray, overclouding the costa as well as the 



TRANS. AM. ENT. SOC, XXXVI. MARCH, 1910. 



