no. i. BOMBYCINE MOTHS OF NORTH AME RICA— PACKARD. 253 



R. hesperus and jacobese the outer line of the hind wings is formed of angular scallops. Two 

 $ s differ in the triangular clear area, in one not reaching the outer line, and in the other the 

 apex cuts through the band. 



Geographical distribution. — The Neogaeic realm. In Central America it ranges from Vera 

 Cruz (Franck) and City of Mexico, Tacubaya (Barrett) southward. It will be interesting to 

 ascertain its extreme northern limits on both coasts of Mexico as well as in the interior. 



[Rothschild, hi Novitates Zoologicse, XIV (November, 1907), has described a number of sub- 

 species of R. orizaba as follows: 



Rothschildia orizaba peruviana, o* . Peru. 

 Rothschildia orizaba equatorialis. & , 9 . Western Ecuador. 

 Rothschildia orizaba cauca. S . Cauca Valley, Colombia. 

 Rothschildia orizaba bogotana. <? . Santa Fe de Bogota. 

 Rothschildia orizaba meridana. <? , 9 . Merida, Venezuela. 

 Rothschildia orizaba triloba. <$ . Tuis and Carre Blanco, Costa Rica. 



Transparent spot on both wings deeply incurved on proximal side; in fore wing 



the apex of the spot projecting beyond the rufous border of the discal 



line, and the lower lobe almost twice the length of the upper one, the 



lower lobe being also in the hind wing much longer than the upper.] 



[Mr. T. Pergande notes that in March, 1896, Dr. B. F. G. Egeling, of Monterey, Mexico, 



sent cocoons of R. orizaba, stating that the natives wore them around the neck, believing them 



to prevent the growth of beard on the chin. A moth issued May 18.] 



Life history. 



Larva. — Stage I: Hatched July 8-9. Described July 12, 1902. 



Length 8-10 mm. Body cylindrical, rather slender, slightly more so than in T. luna. 

 Segments not convex, more as in Callosamia than in Telea or Tropaea. Head rather small, 

 rounded, much as in Callosamia, a little more than half as wide as the body in its thickest part; 

 pale whitish, surface very finely granulated; edge of clypeus dark brown, and a transverse line 

 across the front edge; a large brown round spot on each side. 



Prothoracic segment with no definite plate, but with six long slender high greenish-yellow 

 tubercles, about one-third as thick at base behind; six setae hi each dorsal tubercle; the longer 

 seta? about twice as long as the tubercles. All the tubercles on the second thoracic segment to 

 the end of the body much swollen at base, behig conical, large, and pale straw-yellow, and all 

 oj the same size and height, but those of the second and third thoracic segments are fused together 

 at their base, while those of the abdominal segments are distinctly separate. 



The median tubercle of the eighth abdominal segment is only a little larger and a little 

 broader than those on the ninth segment; those on the ninth abdominal segment fused at base. 



Body above black, except the thoracic segments, which are greenish, with two black spots on 

 each segment above; the sutures livid greenish. 



Suranal plate with two large, slender, distinct tubercles, about one-half as large as the 

 supraspiracular one on the ninth segment; it is greenish yellow, but behind the tubercles dusky. 

 Anal legs blackish in the middle. Infraspiracular row of tubercles arising from the lateral ridge 

 pale greenish-livid, as is the under side of the body and the abdominal legs. Thoracic legs 

 black. 



Each tubercle with six dusky seta?, the longer ones a little longer than the tubercle itself. 



A very beautiful caterpillar, which resembles that of Callosamia hi coloration, but the 

 tubercles are larger, conical, and all alike in size. 



Larva. — Last stage: Head rounded, about one-half as wide as the body is thick, and not 

 so wide as the cervical plate; the surface of the head smooth, polished, with scattered fine hairs 

 on the clypeal region and about the ocelli; in color pea-green. Body thick, cylindrical, tapering 

 a little toward each end; how convex the segments are can not be determined in blown 

 examples. Cervical plate smooth, with no vestiges of tubercles. On the prothoracic segment 



