( fiOfi ) 



S ? . This iuscct flies early in the year, in Southern California early in January, 

 iu Oregon in February, in Washington in March ; it comes to the light late at 

 night. A specimen from Sonth Arizona is dated September. This would show 

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

 example is paler than our other sjiecimens. 



HaL Arizona northward to AV'ashington Territory ; perhaps also in British 

 Columbia, from where it has not yet been recorded. 



In the Tring Museum 18 cJc? from : So. Arizona, ix. ; Los Angelos, 

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



548. Arctonotus terlooi. 



Pi-o«rrjii>iiis lirlooi Edwards, Proc. Calif. Ac Sr. vi. p. ilO (l«7l)) (Mazatlan, Mexico) ; Druce, in 



Biul. Cent,: Awei:, Lip. Hel. i. p. fi. n. 1 (1881) i Kirby, Cut. Lep. Net. i. p. G40. n. 5 (18!)2). 

 I'terugun terlooi, Strecker, Lep. Rhup, Ilet. i. p. V2b. t. 14. f. 2 (1877). 

 ArctviiolKs {f) lei-hiui, Smith, Trans. Amer. ICi/l. Sm-. xv. p. 109 (1888) (an ally to Arrlunofiis'). 



cj. The much redder hindwiug distinguishes this species at a glance. We 

 cannot understand why Edwards |int it into Primerpiiiu.-i. 

 Hah. Mazatlan, Mexico. 

 In the collection of the California Academy at San Francisco. 



CXLVI. AMPHION.-Typus : «m«.s. 



Sji/iiii.r, Cramer (nun Linn^, 1758), Paji. K.ml. ii. p. 1(1 (1777). 



Amphiiin Hiibner, Ver~. Iiel: Schm. p. 13£) (1822) (partim ; typus : hcs.vh.s). 



Tliyreux '!, Harris, in Sillim, Jourii. Sr. Art -xxxvi. p. 308 (183'J). 



Thyreus. Walker {non Swainson, 1H2I), List Lep. Ins. Ii. J/, viii. p. [lit (ISfill). 



cJ ? . Genal process large. Palpus jiointed, projecting forward. E\e strongly 

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

 narrowed, not or little compressed, end-segment (juite short, nut produced iuto a 

 tilamentons process. Merum of midcoxa rounded : foretibia with slender spines 

 externally, irregularly arrauged, midtibia also with some si)ines ; 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 c^, 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, ?wf obliijue, 

 lower angle of cell a little more than W% B? aud M' rather close together. 



6- Tenth segment of abdomen simple, sternite shorter than tergite, both 

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

 scales, ventral edge convex, dorsal one concave ; harpe ending in a short, flat, 

 obtuse process, projecting ventrad beyond the edge of the clasper (PI. IL. 

 f. 17). Penis-sheath (PI. LIV. f. 1.5) with prominent, recurved, and ])oinU'd 

 apical process. 



? . Eighth tergite five times as broad as mesially long, sides ])rojecting as 

 broadly rounded lobes. Vagiiuil plate feebly chitinised, distal edge somewhat 

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

 raised. 



Larva (adult; brown, thorax with three darker brown dorsal lines, following 

 segments with a dorsal mesial row of brown spots and obli'iue brown side-bands; 



