MOTHS OF THE GENUS ARACHNIS — CLARKE 69 



flap. Vinculum broadly rounded. Uncus stout, conical. Flange of 

 tegumen broadly rounded. 



Alar expanse, 54-55 mm. 



Type.—U. S. N. M. No. 54258. 



Type locality. — Phantom Ranch, Grand Canyon, Ariz. 



Food plant. — Unknown. 



Remarks. — Described from the type male (12-IX-1938) and one 

 male paratype (Roaring Springs, Grand Canyon, "VIII-1938") botli 

 collected and submitted by Louis Schellbach, assistant park naturalist. 



This is one of the most brilliantly colored species of the genus and 

 can be distinguished easily from all others by the concolorous 

 ground of the fore and hind wings. It appears to be most nearly 

 related to picta. 



ARACHNIS MIDAS Barnes and Lindsey 



Plate 12, Figures 8-8c 



Arachnis midas Babne.s and Lindsey, Ent. News, vol. 32, p. 297, 1921. — McDun- 

 nouIgh, Check list of the Lepidoptera of Canada and the United States of 

 America (Part 1, Macrolepidoptera ) , No. 1083, 1938. 



Male genitalia. — ^Lateral projection of harpe not bent toward base, 

 broader than distal end of harpe beyond it and roughened on posterior 

 edge; distal end of harpe swollen. Anellus narrower distally than 

 proximally. Aedeagus with well-developed distolateral flap. Vin- 

 culum moderately narrow, rounded. Uncus elongate, angular. 

 Flange of tegumen broad. 



Alar expanse, 55 mm. 



Distribution. — Known only from the type locality. 



Type. — In the U. S. National Museum. 



TyjM locality. — Eureka, Utah. 



Food plant. — Unknown. 



Remarks. — The genitalia of this species are strikingly similar to 

 those of several of the varieties of picta but are at once distin- 

 guished by the elongate and angulate uncus, as shown in the figure. 



I believe this to be another color form of picta but am retaining the 

 specific name for the present because it is represented by the unique 

 type only, which does not offer sufficient evidence for a change. The 

 distolateral flap of the aedeagus is especially typical of picta. 



ARACHNIS ZUNI Neumoegen 



Plate 11, Figubes 5-5 &, 6-6a 



Arachnis zuni Neumoegen, Ent. Amer., vol. 6, p. 173, 1890. — Smith, List of the 

 Lepidoptera of Boreal Amei-ica, No. 1119, 1891. — Kirby, A synonymic cata- 

 logue of the Lepidoptera Heterocera (moths), vol. 1, p. 219, 1892. — Neumoegen 

 and Dyar, Journ. New York Ent. Sec., vol. 1, p. 178. 179, 1893. — Druce, Bi- 



