NO. 1140. NORTH AMERICAN NOCTVIDAE— SMITH AND DYAR. 107 



the transverse posterior line and the upper margin, and very often not 

 reaching either one. The space between the ordinary spots is more or 

 less black filled, forming in the best cases an almost quadrate black 

 mark. The orbicular is large, round, of the palest ground color, and 

 not distinctly defined. The reniform is of good size, rather narrowly 

 kidney shaped, variably defined, but never completely so. Secondaries 

 white in botli sexes, but in the female outwardly smoky and showing 

 traces of an outer transverse line. Beneath powdery, varying from 

 white to smoky, with or without an outer line and discal spot. 



Expanse, 1.3G to 1.G8 inches (34 to 42 mm.). 

 • Habitat. — California; British Columbia; Calgary, Canada; Nebraska, 

 and Kansas. 



This species, though widely distributed, seems to be rare, and there 

 are no great number of specimens in any collection. I have no dates 

 of capture. The specimens vary somewhat in ground color, and par- 

 ticularly in the amount of brown that may be in the wing. The species 

 is unlike any other and easily recognizable by the square patch between 

 the ordinary spots. The very sharply limited dash within the anal 

 angle is also characteristic, because it does not in any instance trench 

 upon the transverse jiosterior line, while in most cases it does not even 

 reach the outer margin. Another characteiestic feature is the remark- 

 ably even transverse posterior line, which is scarcely sinuate in any 

 case and sometimes nearly straight. The head is distinct, the front 

 bulging and a little inflated: the palpi are very well defined and reach 

 to the middle of the frdnt at least. The legs are strongly built, but 

 not particularly prominent; the femur is quite moderate, the tibia 

 strong in proportion, with a small epiphysis situated just above the 

 middle and yet reaching'to the tip. Somewhat unusually short, stout 

 tarsi. The male characters resemble those of occidentalis, but the 

 harpes are rather broader toward the tip; the clasper is distinct, with 

 the ordinary curved upper hook and a short, rather stout pointed pro- 

 cess from the middle of the upper margin. Four males and one female 

 are now at hand, but I have compared others which did not show any 

 noticeable difierences. 



ACRONYCTA RADCLIFFEI Harvey. 



(Plates V, tig. 9, larva; VI, tig. 10, larva; XII, fig. 4, male adult; XX, tig. 17, male 



genitalia.) 



Apatela radcliffei Harvet, Bull. BufT. Soc. Nat. Sci., 1875, II, p. 270.— Grote, 



Papilio, 1883, HI, p. 114. 

 Hyboma radcliffei Grote, Mittb. a. d Roeui. Mus., Hildesh., No. 3, 1896, p. 7. 



Ground color is of a very even, pale bluish ash gray. The head and 

 thorax without obvious markings. The vestiture and coloring of the 

 primaries is very even and smooth. The ordinary markings are all 

 evident and usually well marked. The basal line is geminate, smoky, 

 usually traceable from the costa to the black streak. The transverse 



