AMERICAN LEPIDOPTERA. 289 



scaled ; fore tibiae unarmed, hind tibiae with all spurs. Wings very 

 closely short scaled ; fore wings very rounded at apex, 12 veins, two 

 accessory cells, 10 and 11 from cell; hind wings 8 veins, 3 and 4 

 widely separate, 5 nearer 4 than 6, 6 and 7 stemmed, 8 with cell to 

 beyond middle. 



The genus is scarcely warranted, as it is not sharply distinct struc- 

 turally from C(enocalpe, but it has a very different color aspect, has 

 rounded fore wings, and the vestiture of body and wings is veiy 

 short and close. 



Species. — M. cephisarimn Grt. 



31. cephisarium Grt. may be Melanchoria inconstans Hiib. 



36. MARMOPTERYX Pack. 

 Geom. Moths, 259, 1876. 



Type marmorata Pack. 

 Marmaropteryx Gump. Nova Act. Halle, 49, 332, 1887. 



Palpi short, rather heavy ; tongue developed ; clypeus very promi- 

 nent, rounded, swollen, scaled, subcircular; antennae of % flattened, 

 the segments even, of 9 filiform ; thorax and abdomen untufted ; 

 fore legs with tibiae spined at end ; hind legs with two pairs of spurs ; 

 fore wings 12 veined, two accessory cells, 10 and 11 from cell, 3 and 

 4 from a point ; hind wings 8 veins, 3 and 4 separate, 6 and 7 short 

 stemmed, 8 anastomosing with cell to beyond middle. 



The species of this genus and other species formerly grouped 

 under 3Iarmopteryx beyond question belong to the Hydriomeuidte. 

 They have no affinities whatever, so far as I can see, with the En- 

 nomidae, or the old subfamily Macariidse, where they were formerly 

 placed. 



Species. — 31. marmorata Pack. 



31. odontata Hulst, n. sp. 



M. odontata n. sp. — Expands 38-44 mm. Near 31. mnrmoratn Pack., of 

 which it may be the Colorado form, though very different in appearance. Palpi 

 reddish ocher: front less reddish, summit of head ocher; collar and anterior part 

 of patajiiiB reddish ocher, the rest of the thorax light ocher, as is also the abdo- 

 men. Wings light ocher. more reddish along costa and on outer field, and de- 

 cidedly so on either side costally of the outer line. The color of costa broken 

 by two squares of lighter color ; outer line distinct towards costa. broad, whitish, 

 rounded at vein 5. fading out towards inner margin ; hind wings evenly colored, 

 the band below faintly showing through ; fringes of fore wings checkered with 

 white, of hind wings uniform white; beneath as above in markings, the outer 

 field lighter, the rest of the wing darker than above; outer field white at apex, 

 smoky posteriorly, reddish on both sides of outer line at costa; hind wings white. 



TEAN.S. AM. KNT. SOC. XXIII. (37) AUGUST. 1896. 



