60 Annals Entomological Society of America [Vol. XI, 



hours before hatching, when the black head and dark cervical 

 plate show as a spot and transverse band close to one end of 

 the egg. The hole through which the larva emerges is made at 

 one side of the larger end of the egg, its edge usually just 

 reaching the pole. The empty shell is transparent and 

 iridescent. 



Larva. Instar I. — Head black, cervical plate deep fuscous to black; 

 body when first hatched clear pale yellow with minute pinacula, which 

 later become dingy and more conspicuous. 



Instar II. — Head uniformly fuscous, mouth-parts paler, ocellar 

 area and latero-caudal margin of head black; Cervical plate fuscous, a 

 little paler than head. Pinacula on meso- and meta-thorax small, 

 dusky, those on abdomen larger and more conspicuous because of a 

 shaded pigmented area just cephalad of each. Abdomen tinged with 

 brick-red and already showing faintly the striped pattern of the larger 

 larvae. 



Instar III. — Head uniformly clear brownish-yellow, cervical plate 

 concolorous with head or a little paler. Pinacula dusky and conspicuous, 

 larger and more deeply pigmented caudad. Spiracles small, dark, not 

 prominent in all specimens. 



Instar IV. — Head clear pale yellow without markings except the 

 black ocellar area and latero-caudal margin; mouthparts outlined and 

 the facial sutures marked by very fine dark lines. Cervical plate pale 

 fuscous, darker than head. Pinacula on thorax and abdomen large, 

 mostly surrounded by shaded pigmented areas which make them appear 

 larger. Body plainly longitudinally striped with red, the stripes running 

 one between the dorsal line and alpha and the other between beta and 

 rho on each side, four main stripes separated by narrow whitish more or 

 less broken and irregular lines. 



Instar V. — Head uniform clear pale yellow, mouthparts outlined 

 with fine dark lines, ocellar area crescent -shaped, black. On the margin 

 of head caudad of ocellar area is a small black spot from which a heavy 

 dark line runs dorsad margining the head to the vertical triangle. 

 Cervical plate large, pale yellow, darkening laterad and with a small 

 dark spot in the center of each lateral extremity. Spiracles small 

 black, nearly round and with a black cicatrix of the same size but more 

 elongate, caudad and a little dorsad on each of the pedal segments. 



Instar VI. — Head clear pale yellow, some faintly clouded with darker 

 yellow, ocellar area black, crescent-shaped, caudal margin of head 

 black beginning at a small black spot caudad of ocellar area. Cervical 

 plate broad, pale, slightly darker than head, with paler median stripe 

 and a faintly dusky spot near the lateral margin. 



Instar VII. — Head clear pale yellow, occasionally slightly clouded 

 with darker yellow, black latero-caudal marginal line distinct but 

 becoming faint toward vertical triangle. Facial sutures indistinct, 

 mandibles dark, ocellar area reduced in size, the two tenninal ocelli 



