48 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 95 



KEY TO THE CATERPILLAR AT BIRTH IN RHADDOIDES AND 

 RELATED GENERA 



o\ Head excessively large ; dorsal shield of first thoracic segment conspicuous ; 

 first pair of thoracic legs conspicuously more corneous than the others ; head 

 orbicular. 

 t\ First thoracic segment with only the dorsal shield corneous. 



c\ Dorsal shield of first thoracic segment not nearly reaching the 

 spiracles on either side. 



d^. Head light brownish yellow ; dorsal shield of first thoracic seg- 

 ment much darker ; body chrome yellow Rhahdoides. 



d^. Head black, sometimes blackish brown ; dorsal shield of first 

 thoracic segment of the same color as the head ; body uniform 



pale yellow Goniurus. 



c'. Dorsal shield of first thoracic segment reaching and including the 



spiracles on the side Achalanis. 



b\ First thoracic segment entirely corneous Thoryhes. 



a*. Head only moderately large; dorsal shield of first thoracic segment incon- 

 spicuous ; all the thoracic legs alike in texture ; head subpyramidal, much 

 narrower above than below Epargyreus. 



KEY TO THE MATURE CATERPILLAR IN RHABDOIDES AND RELATED 

 GENERA 



o\ Papillae of body inconspicuous, except by their color. 



b^. With a conspicuous bright-colored lateral stripe, the transverse mark- 

 ings in dots only. 



c^. Prolegs and end of body of the same color as the rest of the body, 

 but paler; first thoracic segment as far as the dorsal shield bright 



rose pink Rhahdoides. 



cl Prolegs orange, with blackish fuscous claws ; end of body orange ; 

 first thoracic segment as far as the dorsal shield reddish. .Goniurns. 

 b^. Markings wholly transverse and in broken lines, the longitudinal mark- 

 ings being wholly interrupted Epargyreus. 



rt^ Papillae of body conspicuous, giving it a granulated appearance. 



&\ Collar half as broad as the! head Achalanis. 



b'. Collar distinctly less than half as broad as the head Thoryhes. 



EXPLANATION OF PLATES 



Plate i (Frontispiece) 



Early stages of Rhahdoides cellus (inset, right center). Left: Full-grown 

 caterpillar removed from its shelter. Left center: Fourth-stage caterpillar. 

 Just beneath the preceding: A shelter or tent made by a third-stage caterpillar. 

 Upper, left side: A leaf with three tents made by a first-stage caterpillar about 

 one-twelfth of an inch long. Loivcr right, beneath the petiole of the leaf: The 

 very inconspicuous shelter made by a full-grown caterpillar. Upper right: A 

 string of five eggs attached to the under surface of a leaf. Inset, lozver left: 

 A pupa, removed from the cocoon. Painting by Hashime Murayama. The cater- 

 pillars are from color sketches of living specimens by Dr. Doris M. Cochran. 

 Reproduced by courtesy of the National Geographic Magazine. 



