130 MEMOIRS OF TUE NATIONAL ACADEMY OF SCIENCES. 



Arkansas (Palm'); normal tbriii, St. Martins Falls, Albany Ifiver, Tlndson Bay (Dr. Baruston 

 fide Walker); Brunswick, Me. (Packard); Frauconia, X. H. (Slosson); Boston, Mass.; Pouyli- 

 keepsie, N. Y. (Dyar); Dublin, N. H. (Leonard, Harris coll.); Plattsburg, N. Y'. (Hudson); 

 Illinois, Manhattan, Kaus. (Poi)enoe); Colorado, a 5 about balfway between the normal foiin 

 and iiicarccniia (Pack, coll.); Yo Semite, Cal.; Portland, Oreg.; Seattle, Wash. ; Victoria, British 

 Columbia; Denver, Colo., May H. The Western form incarceruta {ornatu), Kansas (Bruner); 

 Colorado (Pack. coll.). California (Morrison), in hue and size exactly like one from Truckee 

 Valley (Mr. Glashain); a very small pale 9 from Eeno, Nev. (Pack, coll.); a rather large one 

 from Olympia, Wasli. (T. Kiucaid); Seattle, Wash. (Dyar); indnitata, Kittery, Me ; New 

 Hampshire; van, Maine, New York; ornata, California; bijiria, Soda Springs, Colo. (French); 

 var. ornatu, Fort Collins, Colo. (Baker). 



Ichthyura iiioniata Xeumoegeu. 

 (PI. Ill, ligs. 9-11.) 



Jih III II II in iiioninUi Xeiiin., Papilin, ii, p. 13^, Oct. 7, 1882. 



Puck., Kilt. News, iv, ji. 78, March, 1893. 



Ncuin. aud Dyar, Can. Ent., xxv, p. 12.3, May, 1893. 

 Melahiphn iiionuila Xeiiiii. aud D-'ar, Trans. Amer. Ent. Soc, xxi, p. 192, 1894; .Tonrn. N. Y. Ent. Soc, ii, p. 113, 

 1894. 



A]>parently, although at first sight this is a distinct species, it may i)rove to intergrade with 

 apicidis {inc((rcernt(i). Its characters are brought out in the following notes published in 

 Entomological News, 189.3. Until we know its larval history it may be better to regard it as a 

 distinct species. 



I am strongly inclined to regard this form as a climatic variety of /. rau var. ornata. One 

 medium-sized oninta from southern California intergrades with /. Inornafa, though it is much 

 smaller. Ifhas the large diffuse discal spot and pale leaden interveuular patches of inornatn. 



Of I. inontata Neum., a male and fenmle from Arizona are in the Edwards collection. It is 

 the largest and i)alest of all our forms. It scarcely difters from /. oniatit in the situation of the 

 lines and their relative distribution; the oblique costal white line and its continuation across the 

 wing are the same, and the obtuse almost rounded apex of the V does not quite reach the edge, 

 just as it does not in ornata, but the loop made by the obtuse apex is more marked in inornata. 

 The short middle line, ending on the hind edge of the wing, and the dislocated basal line are 

 exactly as in ornata. 



I. inornata, then, appears to be only a very large and unusually pale subocherous form of 

 apicalis, following the same law of climatic variation, i. e., increase in size and a pale, faded 

 appearance in Pacific Coast exami)les (south of Oregon), due probably to a hot, dry, desert region, 

 -with a light-colored surface soil. By adaptation to these conditions the moths are better protected 

 from observation, and thus tlie life of tlie species is assured. 



Gcoyrajjhical distribution. — So far as known confined to st)utheastern Arizona. Mr. Neumoegen 

 does not state the exact locality in " southeastern Arizona" whence this form was brought, but it 

 would seem to be a member of the JSIexican (Sonoran) subprovince. Thus far no species of 

 Ichthyura is cited from Mexico by Mr. Druce in the Biologia Centrali-Americana. 



Ichthyura strigosa Grote. 

 (PI. Ill, figs. 12-14). 



Iclithi/iira strigosa Grote, Bnll. U. S. Oeol. Geogr. Survey Terr., vi, p. 582, Aug. 30, 1882; Check List N. 

 Amer. Moths, p. 18, 1882. 

 Pack., Fifth Rep. U. S. Ent. Com. Forest Trees, p. 453, 1890. 

 Smith, List Lep. Bor. Amer., p. 29, 1891. 

 Kirby, Syn. Cat. Lep. Het., i, p. 610, 1892. 

 var. lucideiita Edw. Ent. Amer., ii, 10, April, 1886. 

 Pack., Ent. News, p. 78, March, 1893. 

 MelalopJia strigosa Neum. and Dyar, Trans. Amer. Ent. Soc, p. 191, 1894; Journ. N. Y. Ent. Soc, ii, p. 115,,. 

 1894. 



'All the sjiecies found by Mr. Palm in Arkansas were collected iu the southwestern counties of that State.. 



