no. i. BOMBYCINE MOTHS OF NORTH AMERICA—PACKARD. 257 



The tubercles on abdominal segments 2-7 are smaller than those on the first abdominal seg- 

 ment, and gradually become smaller toward the seventh segment. The setae in general are a 

 little longer than the tubercles are high. 



The median tubercle on the eighth segment is low, not so high as broad, and in outline 

 seen from above is transversely oval, bearing four principal larger setse and three minute ones 

 besides. (The originally double origin of the tubercle is not evident.) 



There are on the ninth abdominal segment very minute green vestiges of two tubercles. 



Suranal plate green, with a conspicuous white stripe on the edge, and on top of the plate 

 is a subtriangular black mark made by a narrow black line, and a triangular black ring on 

 the outside of the anal legs. 



Front edge of abdominal segments 3-7 with a broad, conspicuous pale purple-madder stripe, 

 which is widest below and narrow above; this is succeeded by a white band, widening dorsally and 

 conspicuous when seen from above. Spiracles yellow ochre. Thoracic legs green, irregularly 

 ringed with black, the tips black; the four pairs of midabdominal legs black-brown, with an 

 external conspicuous yellowish-green •patch, and armed with rather long curved setse. The 

 plantae of the anal legs black-brown. 



Cocoon. — On the morning of June 13 my larva, which was a little under the normal size, 

 had begun to spin a cocoon, and the handle or stem of the cocoon had been spun before it was 

 nearly finished; the rather large opening for the exit of the moth had been left open.. 



Number of molts and habits. — There are four castings of the skin and five stages, as usual 

 in the bombycine moths, and the family Saturniidae. In captivity in a northern State (New 

 York and afterwards Rhode Island), the ecdyses occurred at about every 10 days, the eggs 

 being laid near the end of April and the larvae hatching out the first of May. 



Food plant. — The larvae were fed on the ash and wild cherry, but preferred the latter. 

 Its native food plant is unknown to us. 



ROTHSCHILDIA ERYCINA (Shaw). 



Plates XLV, figs. 3, 4; LXX, fig. 3. 



Attacus erycina Shaw, Nat. Miscellany, VII, t. 230, 1797. 



Phalaenahesperus Cramer, Papillons Exotiques, I, PI. 68, A, 1775. — Sulzer, Gen. Ins., tab. 21, fig. 2, 1776. — Fabricius, 



Entomologia Systema, 2d edit., Ill, p. 408, No. 2, 1793. 

 Phalaena splendidus De Beauvois, Insectes en Afrique et en Amerique, p. 133. PI. 22, figs. 1, 2, 1805. 

 Attacus hesperus Walker, Cat. Lep. Het. Br. Mus., V, p. 1209, No. 8, 1855. 

 Attacus splendidus Clemens, Proc. Acad. Nat. Sci. Philad., 1860, p. 160. [This is not splendidus, but apparently jorulla 



or orizaba. — McDunnough.] 

 Attacus erycina Kirby, Syn. Cat. Lep. Het., I, p. 747, 1892. 



Imago. — Two 6" , two 9 . In shape of wings and style of markings allied to the more 

 common R. orizaba. Head as usual; color white and a white band at the hinder edge of the 

 thorax as usual. Fore wings falcate, as in 6* of R. orizaba and R. lebeaui; not so narrow and 

 produced as in R. jacobese, aricia, and arethusa. The distinctive mark is the shape of the clear 

 discal spots on the fore wings, which are very [?] and oval, not triangular as in R. orizaba, 

 lebeaui, jacobese, hesperus, and aricia. The spot is oval, wide, large, the end toward the base 

 of the wing unusually broad, and varying in the 9 example from Pulvon, Nicaragua, in being 

 straight and regularly curved, not oblique; in the Texas 6* it is oblique, but most so in the 

 Brazil 9 ; the spot is shortest in the Honduras (?) <? , longest in the Texas 6* . The subapical 

 spot as in R. orizaba, and lebeaui, consisting of three black spots; the inner, larger, one wedge 

 shaped, and inserted between the two oval smaller ones; and separated by an S-shaped umber 

 brown line. These spots are very distinct in all except the 9 from Brazil, in which the two 

 outer spots are obsolete, and the inner one forms a distinct narrow sharp wedge. 



The apical region is hoary lilac-pink, in all the specimens the size and color of this area 

 is the same, except in the Brazilian 9 , where it is larger and more ferruginous. 



The basal line is as in R. orizaba, pointed and a little produced as usual toward the discal 

 spot. Extradiscal line in its course and degree of scalloping much as in R. orizaba; between 

 83570°— 14 17 



