no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 107 



All the markings, including the lateral line, the two subdorsal rows of red spots (the latter 

 a little smaller), the suranal plate and abdominal legs and the pale head are of the same color. 



Cocoon. — Large and loose, of the same size, shape, and color as that of A. illustris. Length, 

 45 to 60 mm.; diameter, 23 mm. 



Pupa. — That of 3 differs from c? of A. illustris in being much more coarsely granulated, 

 the little warts not being arranged in lines as they are in A. illustris s . Length, 35 mm. ; thick- 

 ness, 14 mm. 



Geographical distribution. — Buenos Aires (American Museum of Natural History, New York). 



AUTOMER1S VIRTDESCENS (Walker). 

 Plate XX, figs. 5, 6; LIV, figs. 2, 3. 

 [Hyperchiria viridescens Walker, Cat. Lep. Het. Brit. Mus., VI (1855), p. 1303.] 



Larva. — Stage III (?): Length, 40 mm.; width of head, 4 mm. The shape of the body 

 and the armature is much as in H. io. Head and body black. 



Spines short and close, radiating, and much as in mature H. io in general appearance, 

 and quite different from the larva in the two last stages. All the tubercles (spines) are straw- 

 yellow. Pro thoracic dorsal spine as long as the head is wide, bearing about 16 spinules, the 

 longest spinule about one-third (or a little more) as long as the spine itself. The dorsal spines on 

 the segments behind are all of the same size and length, the spines radiating; second thoracic 

 dorsal spines longer than any of the others, the longest or highest branch bearing four or five 

 spinules. The median spine on eighth abdominal segment is about a third thicker than the 

 others on each side; its original double nature is scarcely indicated. 



All the legs, thoracic and abdominal, black. Spiracles white. 



Larva. — Penultimate stage: Length, 70 mm.; width of head, 6 mm. Head shining black, 

 body deep velvety black. 



Spinules not now radiating, but vertical, forming a thin brush or tuft. Prothoracic dorsal 

 spines as long as those on the segments behind, but slenderer, with fewer spinules. The rela- 

 tive size and thickness of the tufts themselves much as in the last stage. Spiracles white. 

 It differs not so much in the proportions of the bundle of spines as that the spinules are rounder, 

 not flattened, as they are in the fully grown larva, and the spinules radiate a little more. 



[Described from material from Buenos Aires.] 



AUTOMERIS LEUCANE (Geyer). 



[Gamelia leucane Geyer, Samml. Ex. Schmett., Ill (1837?).] 



[Larva. — Head larger than joint 2, flat before, rounded above, not bilobed; shining black, 

 shagreened, with a few short, inconspicuous secondary setse. Body cylindrical, tapering before 

 and abruptly behind; coal-black, a little wrinkly shagreened and with a few sparse pale second- 

 ary hairs; spines light yellow. The spines are in four rows on joints 2 to 5; five rows on joint 

 6; three rows on joints 7 to 10; four rows on joint 12; a single dorsal and three other rows on 

 joints 13 and 14. The spines are rather short, each with several long branches, tipped with 

 small black points; the two upper rows of joints 2 and 3 are rather longer than the others, as 

 are also the dorsal ones of 13 and 14; the subventral ones are small. Feet and leg shields shin- 

 ing black. Misantla, State of Vera Cruz, Mexico (W. Gugelmann). Food plant. Troena 

 [=?].— H. G. Dyar, Proc. Ent. Soc. Wash., XIV. (1912), p. 55.] 



AUTOMERIS JANUS (Cramer). 



[Attacus janus Cramer, Pap. Exot., I (1775).] 



[In A. janus the spine defense (of the larva) is carried to an extreme; the length of the 

 profusely branching spines is 15 mm. to 25 mm., or twice the diameter of the body, and so 

 abundant (are they) that the larva looks like a bunch of moss a few yards away ; while the quan- 

 tity of poison contained in these spines is so great that during the process of inflating the 

 fumes which are driven off * * * are positively dangerous. * * * — O. W. Barrett, 



