— 2l6 — 



PREPARATORY STAGES OF SAMIA CYNTHIA Dr. 



BY WILLIAM BEUTENMULLER. 



Egg. — Oval, creamy -white, covered with an olivaceous green 

 substance, used to adhere the egg to the leaf. Length 1.6 mm. 

 Duration of this stage fourteen days. Laid in small masses of about 

 twelve on the underside of leaf Total number of eggs laid about 

 250. 



Young Larva. — Head jet-black, shiny, smooth, mouth parts 

 yellowish brown, mandibles pitchy brown; cervical shield black. 

 Body yellow, with a series of two rows of black tubercles along the 

 dorsal region, and one row along the subdorsal and another row 

 along the sides below the spiracles also black All the tubercles 

 have at the apex three or four small spines, each bearing a rather 

 long, sordid white hair. Along the spaces between each row of 

 tubercles, is a row of black spots. Body beneath yellow, thoracic 

 feet shiny, black; abdominal legs concolorous with the body, but 

 with a black corneous patch on the outerside of each. Over the 

 head are also scattered a few sordid white hairs. Length 2.50 mm. 

 Length two days old, 3 mm. ; three days old, 5 mm. ; four days 

 old, 7 mm. ; five days old, 7 mm. ; getting ready to moult. 



After First Moult. — No perceptible change from the pre- 

 vious stage, except that the cervical shield is now concolorous with 

 the body. Length 8 mm. (six days old) ; seven days old, 9 mm. ; 

 eight days old, 10 mm. ; getting ready to moult. 



After Second Moult. — All the tubercles in this moult are 

 now yellow, except the lateral row remaining black. Head yellow, 

 with a black spot on -each side of the anterior part; mandibles pitchy 

 black, otherwise the same as the preceding moult. Length 12 mm. 

 (nine days old); ten days old, 14 mm.; eleven days old, 16 mm.; 

 twelve days old, ig mm.; thirteen days old, 21 mm.; getting ready 

 to moult. 



After Third Moult. — The body color is now pale whitish 

 green, as are also the tubercles, except those along the side black, 

 with their extremities whitish. Head and cervical shield yellowish 

 green. Anal plates also yellowish green, margined with blue; under- 

 side greenish; also all the feet. The body and tubercles covered with 

 a white powder. Length 23 mm. (fourteen days old); fifteen days 

 old, 25 mm. ; sixteen days old, 27 mm. ; seventeen days old, 30 

 mm.; eighteen days old, 32 mm.; nineteen days old, 35 mm.; 

 getting ready to moult. 



