1916] Classification of the SaturniidcE 151 



by the larva. The other species usually have grayish-tan or 

 brown cocoons. The pupae of these species may be separated by 

 the following table: 



A. Dorsum of abdominal segments finely deeply fugose, glossy, somewhat 

 resembling velvet; color usually very dark brown or black. 

 B. Ventral row of tubercle scars always present and conspicuous, usually 

 smooth and shining; tubercle scars on the metathorax and first 

 abdominal segment very prominent and often red in color. 



gloveri. 

 BB. Ventral row of tubercle scars never present; tubercle scars on the 

 metathorax and first abdominal segment small and inconspic- 

 uous and never red in color. californica. 

 AA. Dorsum of abdominal segments finely rugose, but not deep enough to give the 

 dull surface a velvety appearance; color usually yellowish or chestnut 

 brown, rarely black. 

 B. Maxillae one-fifth the length of the wings; length normally over one 

 inch. cecropia. 

 BB. Maxillae one-fourth the length of the wings; length not over one inch; 

 tubercle scars of the metathorax and first abdominal segments 

 usually prominent, often elevated and tipped with red. Columbia. 



Samia californica Grote. — Color variable, typical specimens 

 black, the caudal abdominal segments often light brown or 

 yellowish and occasional specimens almost entirely yellowish 

 brown; face parts, appendages and exposed surface of the 

 thorax with fine, wavy, indeterminate transverse striations; 

 dorsal abdominal segments 1-8 finely, deeply rugose resembling 

 velvet, glossy in appearance, remainder of surface practically 

 smooth; antennae of male with the stem of the fiagellum about 

 one-fourth the total width of the antenna and with the tips 

 sometimes extending beyond the pectinations ; the length of the 

 antenna a little more than twice the width and almost reaching 

 the tips of the second pair of legs, the distal half of each antenna 

 occasionally lying adjacent on the meson; antennas of female 

 with the stem of the fiagellum one-third or more the total width 

 of the antenna, ending opposite the tips of the first pair of legs 

 and slightly shorter in some abnormal specimens, length a little 

 more than three times width; clypeo-labral suture usually 

 distinct; the clypeus not prominently convex cephalad of the 

 labrum; labrum variable, concave on its proximal margin, 

 broadly rounded or slightly pointed at distal end, the width at 

 least twice the length; maxillae, measured on meson, about 

 one-fourth the length of wings, the mesal length usually greater 

 than the greatest width ; third pair of legs often showing between 

 the wings; mesothorax with the alar area slightly polished, 

 never showing a distinct tubercle or tubercle scar; meta- 

 thorax without distinct tubercles; second pair of wings visible 



