no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 125 



Ab. conjuncta Watson, Entom. News, XXIII (1912), p. 97, PI. VII, f. 4, 9 . "Differs 

 from typical burnsi in having the hinder ends of the apical and transverse black bands of fore 

 wings joined together by a distinct black line running along the hind margin. The nervures 

 outlined with black from the apical (post median) band toward the discal spot." Reno, Nev.] ' 



[Watson briefly describes the egg and pupa. The larvas are described as burrowing into 

 sandy soil, apparently spinning a slight web, certain pupa? having silk attached to the cremaster.] 



[Subgenus EULEUCOPHAEUS Packard.] 

 [Euleucophaeus Packard, Rep. Peabody Academy, IV, (1872), p. 88]. 



Euleucophaeus is a very definite section of Hemileuca, and I am not sure but that it should 

 be regarded as a subgenus, or a genus in process of differentiation from Hemileuca. While not 

 generically different as regards venation, it differs in the decidedly shorter and broader wings 

 and paler coloration, and in markings, there being a basal and an extradiscal line not present 

 in normal Hemileuca, and faint discal spots. All three features may be owing to the reaction 

 from a dry, elevated clirnate, but they are very distinctive and common to several species. 



[The larva of II. olivise. departs widely from typical Hemileuca in being a grass-feeder. 

 Whether this is true of all Euleucophaeus is not known.] 



[In much of the manuscript on the species of Euleucophaeus, Dr. Packard has left the 

 generic name blank, evidently being undecided whether to use Euleucophaeus or Hemileuca. 

 Following the sense of the above remarks, I have placed all the species in Hemileuca.] 



HEMILEUCA TRICOLOR (Packard). 



Plate LXVIII, figs. 9, 10. 



Euleucophaeus tricolor Packard [Rep. Peabody Academy, IV (1872), p. 89]. 



[Hemileuca tricolor Holland, The Moth Book, PI. XII, fig. 9. Good colored figure of male.] 



Imago. — Two <? . Head dull brick-madder, reddish in front as are the femora and breast; 

 vertex of head and top of thorax dark gray, with gray hairs intermixed, with lighter and reddish 

 scales mixed. Antennae pale reddish brown. Fore wings slightly narrower and more subfalcate 

 than in E. olivise and much more so than in E. norba, but the outer edge is not very full, not 

 nearly so much so as in H. maia, and the apex is a little more rounded. 



Fore wings dark stone or granite gray, with a slight olive tinge. The basal line is snow 

 white, broad and bent inwards on the costa, where in E. norba and olivise, it is not so bent, it 

 also extends inwards along the inner edge to the base of the wing, inclosing a mouse-gray slash 

 situated on vein VI. Discal spot very distinct, somewhat curved or crescent-shaped, and 

 forming the center of an obscure roundish dark spot. Extradiscal line broad, snow white, 

 very distinct, and situated nearer the outer edge of the wing than usual, and ending on the 

 costa much nearer the apex than in any other of the species mentioned. Fringe snow white 

 and on the apex connects with the expanded end of the extradiscal hue. Outer edge of the 

 wing between the extradiscal and the fringe is as dark as in the middle of the wing. Hind wings 

 whitish, madder red at the base; there are no lines, and no discal spot is to be seen in my rather 

 badly preserved specimen. Under side of the fore wings along the costa madder red; otherwise 

 as above, the discal spot and lines faintly reproduced. Hind wings as above. Abdomen 

 madder red, beneath broadly banded with white. Legs reddish with gray hairs at base. 



Expanse of fore wings, S 52 mm.; 9 68 mm. 



Length of fore wing, S 26 mm. ; 9 33 mm. 



Breadth of fore wing, <? 12 mm.; 9 16 mm. 



Length of hind wing, S 19 mm.; 9 23 mm. 



Breadth of hind wing, <J 12 mm.; 9 16 mm. 



i (Mr. Watson has since obtained from a second year pupa of B. burnsi a female "with entire wings suffused along margin and costa with lilac- 

 gray scales, more pronounced below," almost the shade of the gray on B. tricolor. This he has described in Entomological News, Vol. XXIV, p. 130, 

 as ab. paradoza. He has also obtained a female with the extreme edge of hind wings with a single row of black scales, forming a black line between 

 the margin and the white fringes.] 



