166 MEMOIRS NATIONAL ACADEMY OF .SCIENCES. vol. xn, 



Hind wings with a scalloped basal, and a faintly marked extradiscal line, while halfway 

 between the extradiscal line and the outer edge is a series of about five little obscure brown 

 spots which are larger and heavier in the female. 



Under side as above, but the ocelli less distinct. 



Expanse of the fore wings, 6* 80-85 mm. 



Length of a fore wing, c? 45 mm. 



Breadth of a fore wing, s 25 mm. 



Length of a lrind wing, o* 32 mm. 



Breadth of a hind wing, $ 25 mm. 



Discal spots of fore wings, 3 3 X 2 mm. 

 Geographical distribution. — Natal (J. Queckett) ; Zanzibar (collection of W. L. Abbott, 

 United States National Museum). 



Larva. — Length 50-52 mm. Head rather small, smooth, unarmed, considerably narrower 

 than the pro thoracic segment, and of the same width as the prothoracic plate; pale chestnut 

 or reddish honey-yellow. Prothoracic plate armed with four tubercles, but the two c each 

 side of the median line are nearly fused at the base. From the inner or median tubercles arise 

 two, and from the outer four conical warts or tuberculets, giving rise to long slender setae, and 

 on the posterior edge of the plate are two minute setiferous tubercles, one on eacli side of the 

 median line. Over the surface of this plate, as well as the rest of the body, are scattered short 

 minute clavate setas. The prothoracic tubercles (one on each side of the body) of the supra- 

 spiracular series are distinct and bear seven conical setiferous secondary warts; those of the 

 infraspiracular series being situated directly over the base of the legs. 



The dorsal thoracic and abdominal tubercles are large, high, and much alike. Those of 

 the second, tliird thoracic, and first to seventh abdominal segments are alike in size, height, 

 and shape; there are eight tubercles on each thoracic, and six on each abdominal segment. 

 Those of the three dorsal rows (supraspiracular and subdorsal) are nearly aUke in size, those of 

 the supraspiracular row a little smaller than those above. Of the submedian dorsal row (one 

 on each side of the median line) those on the second thoracic segment are fused together at the 

 base; those of the third thoracic segment are less so, a ridge connecting them; those of the 

 first abdominal segment are entirely separate. Each tubercle is stout, cylindrical, about tliree 

 times as long as thick and bearing four to five conical warts (one in the center), each of which 

 give rise to a long stout seta. The median abdominal tubercles differ from those of the thoracic 

 segments in the crown, being more oblique, less flat, and regular. On the abdominal segments 

 the infraspiracular tubercles are reduced, becoming small, low, flattened, and bearing from two 

 to four setiferous warts or tuberculets. 



The median tubercle on eighth abdominal segment is about twice the size of those on each 

 side and is forked or divided nearly halfway down, showing the late fusion of the originally 

 two separate dorsal tubercles, which will probably in stage I be found to be entirely separate; 

 each fork is capped with three setiferous tubercles. On the ninth abdominal segment are four 

 dorsal tubercles (two supraspiracular), the two on each side fused at the base. 



Suranal plate triangular, a little broader than long, the end conical, stout, solid; the surface 

 with a pair of low double-headed stout tubercles, with two simple and several smaller ones on 

 each side, while the edge is rough with setiferous tubercles, both coarse and fine. Anal legs of 

 moderate size, the lateral subtriangular thickened area with setiferous tubercles around the 

 edge; the setae long, bristlelike. Thoracic legs reddish honey-yellow; abdominal ones a little 

 paler, with a number of setiferous warts at the base. 



The body is striped somewhat like a Datana larva from the first thoracic to the ninth 

 abdominal segment with coarse black-brown and pale yellowish green (in formalin) stripes. A 

 black median dorsal stripe, and also six on each side and underneath, except on the leg-bearing 

 segments; the dark stripes broken up into irregular spots along the base of the abdominal but 

 not of the thoracic legs; thus the black lines are more broken on the abdominal than on the 

 thoracic segments, the process of formation of spots beginning from behind forward, as in larvx 

 of other lepidopterous groups. 



