1916] Classification of the Saturniidce 149 



Rothschildia joruUa Westwood. — Color usually reddish 

 brown; exposed surface of thorax, and usually the face parts, 

 with fine, indeterminate, transverse striations, deeper on the 

 prothorax; abdominal segments 1-4 with minute tubercles, 

 remainder of body surface practically smooth; exposed surface 

 of thorax and abdomen with conspicuous, coarse reddish setae, 

 most numerous on the first four abdominal segments and sparsely 

 distributed over the remainder; antenna in both sexes sep- 

 arated by the legs and extending more than half way between 

 the tips of the first and second pairs of legs, length in the male 

 three times the breadth, in the female almost four times the 

 breadth ; face parts convex, mostly in the clypeal region ; labrum 

 variable, always broader than long and generally with a rounded 

 median lobe; maxillae, measured on meson, one-sixth the length 

 of wings; median thoracic line distinct on prothorax and part 

 of mesothorax; mesothorax roughened and metanotum longi- 

 tudinally wrinkled at base of wings, but never noticeably 

 depressed; distal margin of first wing only slightly elevated 

 above dorsal surface of body; abdominal spiracles usually free, 

 second abdominal spiracle adjacent to the wings; caudal end of 

 abdomen with a narrow, transverse band of setae, sometimes 

 extending on dorsal surface of tenth abdominal segment, either 

 erect or closely appressed to body. Length, retracted, 25-28 

 mm. ; girth about 45 mm. 



Genus Samia Hiibner. 



Body cylindrical; face parts slightly elevated; antennae 

 with the stem of the flagellum raised above the level of the 

 pectinations, in the female the antenna is pectinate throughout^ 

 not prominently elevated above the surface of the wings, and 

 tapering gradually to a pointed tip at the distal end, in the 

 male strongly elevated above the surface of the wings, the sides 

 approximately parallel for the greater part of their length and 

 tapering gradually to a blunt, rounded tip at the distal end, the 

 stem of the flagellum often extending beyond the pectinations; 

 a portion of the glazed eye-piece always visible in the female, 

 sometimes in the male; invaginations for the anterior arms of 

 the tentorium distinct; clypeo-labral suture usually distinct; 

 labrum with width always much greater than length; maxillae, 

 measured on meson, never less than one-fifth the length of 

 wings, triangular in outline, and usually smooth in comparison 



