no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 259 



having come from the Canal Zone. It may be distinguished from erycina by the uniformly 

 dark, smoky brown color, approaching that of lebeaui; by the small size and narrower primaries; 

 and by the relatively conspicuous double row of submarginal black spots on the secondaries. 

 The vitreous spots are entirely different in shape, being triangular and more or less acute- 

 angled. There is the same ovoid-oblong, pale brown, suffused area on the apical third of the 



primaries as in erycina."] 



ROTHSCHILDIA BETIS (Walker). 



Plate XLV, fig. 1; XLVI, fig. 7. 

 ROTHSCHILDIA ARICIA (Walker). 



Plate XLVI, fig. 4. 

 ROTHSCHILDIA HESPERUS (L.). 



Plate XLVI, fig. 5. 

 ROTHSCHILDIA LEBEAUI (Guer.). 



Plate XLVI, fig. 6. 



ROTHSCHILDIA JACOBiE^ (Walker). 

 Plate XLV, fig. 2. 

 Attacusjacobxse, Walker, Cat. Lap. Het. Brit. Mua., V (1855), p. 1219.] 



The materials on which our life history of this species is based were obtained by the American 

 Museum of Natural History from Buenos Aires. It consisted of the eggs, inflated larvae in 

 three stages, the pupa, cocoon, with <? and ? , all in an excellent state of preservation, and I 

 am indebted to Dr. H. C. Bumpus, the director of the Museum, and Mr. William Beutenmuller, 

 the assistant in charge of the Department of Entomology, for loan of the specimens. 



Eggs. — Oval, flattened, chalky white; surface shining, seen under the lens to be very finely 

 pitted ; greatest diameter about 2 mm. 



Larva. — Stage II: The blown larva in the third stage had retained on the last half of the 

 body the skin of what we suppose to be this stage. It shows, what is not present in the next 

 stage, two parallel rows of six linear black spots passing across the segments. On the suranal plate, 

 on each side, is a low flattened green tubercle, bearing six dark spine-like setae,. There are faint 

 traces of a reddish spot on the plate, and on the side of each anal egg. All the tubercles black. 

 The median tubercle on the eighth abdominal segment slightly bilateral, bearing four setae on 

 each side. Suranal plate with a yellow band on the edge. 



Stage III: What is probably of this stage is a blown larva. Length of body 34 mm. 

 width of head 2.7 mm. Head pale yellowish brown (probably -gieen in life), clypeal sutures 

 black, and on each side is a black line extending from the eyes up to the center of the vertex on 

 each side. 



Body green; cylindrical, with prominent tubercles as in the corresponding stage of other 

 Attacine larvae. Prothoracic plate with four well-developed green tubercles, which are low, 

 rounded, about half as large as those on the second thoracic segment, and each bearing six dark 

 setae. Tubercles of the second and third thoracic segments, each with fairly large green warts or 

 tuberculets, each bearing a black seta longer than the main tubercle, at least a third longer. 

 Those of the first abdominal segment a little larger than those on segments 2-7. 



The median tubercle on the eighth abdominal segment double, and apparently as large as 

 the thoracic ones (this is covered by the loosened skin of the previous stage). Legs as in the 

 last stage, but the inidabdominal ones not so much black in extent at the end. Spiracles black. 

 The yellowish rings of the later stage are in this period faint. 



Stage next to the last: Length of body 70 mm.; width of head 4 mm. Head and body 

 pea-green, as in the last stage. On the prothoracic segment the position of the primitive dorsal 

 tubercles (seen on stage in) is indicated by minute setiferous warts. Dorsal tubercles on the 



