( fior. ) 



(? ?. Tliis ill^('(■t flics early in llic yrar, in Soiitiicni Calit'oniia carl} in .Januar}', 

 in Oregon iu Fclmiary, in \Vasliinj;;tiin in March ; it comes to the light late at 

 night. A s])ecimcn from iSonth Arizona is dated September. This would show 

 that there are either two broods, or that the imago hibernates. The Arizona 

 cxami)le is paler than onr other specimens. 



Hull. Arizona northward to Washington Territory : perhaps also in British 

 ( ulnmbia, from where it has not yet been recorded. 



In the Tring Museum Is c?c? from : So. Arizona, i.\. ; Los Angelos, 

 California, i. ; Gold Hill, Oregon, ii. ; Pullman, Washington, iii. 



•j4s. Arctonotus terlooi. 



I'rusirjniiiiy Irrlooi Edwards. I'mr. Calif. Ai\ 8r. vi. p. 90 (IHTC) (Miizatlan, Mexico) ; Druce, in 



Biol. Cent): Ainer., Lrp. lid. i. p. 5. n. 1 (1881) ; Kirby, Cut. Leji. llrt. i. p. i;4o. n. 5 (18112). 

 l'tfiv(jiin tci-looi, Strecker, Leji. Rkup. Het. i. p. 126. t. 14. f. 2 (1877). 

 .{rdmiuliix {';) tpvhini, Smith, Tmiix. Amer. Eiit. Sue. xv. p. 109 (1888) (au ally to Aniuiiofii-f). 



cJ. The much redder hindwing distinguishes this species at a glance. We 

 cannot understand why Edwards put it into l'ro.serj>inu.'<. 

 Huh. Mazatlan, Mexico. 

 In the collection of the California Academy at Sau Francisco. 



CXLVI. AMrHION.-Typus : nessus. 



Sjiliiiu\ Cnimer {wn Linne, 1758), Pap. E.mf. ii. p. Ifi (1777). 



Amphiiiii Hiibner, Verx. hek. Schm. p. 135 (1822) (partim : typus : uesuH-H). 



Thyrem ?, Harris, in Sillim, Joiirn. Si-. Art .xiocvi. p. 308 (18;59). 



Thyrciiis, Walker (non Swainson, I>i21), List Lep. Ins. B. M. viii. p. 99 (1856). 



(? ? . Genal process large. Palpus pointed, projecting forward. Eye strongly 

 lashed. Antenna filiform, slightly incrassate beyond middle, hook long, gradually 

 narrowed, not or little compressed, end-segment quite short, not produced into a 

 filamentous process. Merum of midcoxa rounded ; foretibia with slender spines 

 externally, irregularly arranged, midtibia also with some spines ; no comb to 

 midtarsus : paronychium with two pairs of lobes ; spurs very unequal. Spines of 

 abdomen all elongate, strong above and below, flat; fan-tail broad in <S , trilobate, 

 the middle lobe thin ; in ? more truncate, with the middle lobe a little projecting. 

 Distal margin of forewing bisinuate ; cross-veins of hindwing transverse, not obliijue, 

 lower angle of cell a little more than W', W and M' rather close together. 



S. Tenth segment of alxlomen simple, sternite shorter than tergite, both 

 slender, slightly narrowed to apex, which is rounded. Clasper without friction- 

 scales, ventral edge convex, dorsal one concave ; harp)e ending in a short, flat, 

 obtuse i)rocess, projecting ventrad beyond the edge of the clasper (PI. IL. 

 f. 17). Penis-sheath (PI. LIV. f. 15) with prominent, recurved, and pointed 

 apical process. 



? . Eighth tergite five times as broad as mesially long, sides projecting as 

 liroadly rounded lobes. Vaginal plate feebly chitinised, distal edge somewhat 

 incrassate, apex suddenly narrowed ; oriflce large, median, with the edges slightly 

 raised. 



Larva (adultj brown, thorax with three darker brown dorsal lines, following 

 segments with a dorsal mesial row of brown spots and oblique brown side-bands; 



