150 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



LUDIA DELEGORGUEI Boisduval. 



Plate XXXI, fig. 7; LXXX, fig. 8; CXI, figs. c-g. 



[Saturnio] delegorguei Boisduval [in Delegorgue, Voy. Afr. Austr., II (1847), p. 601.] 



[Henucha delegorguei Fawcett, Trans. Zool. Soc. Lond., XVII (1903), p. 172, PI. VI, fig. 36. Larva.] 



Imago. — One <? , one ? . Body and wings dark fawn brown, including the head, antennae, 

 palpi, and abdomen. Fore wings with the basal line oblique, not wavy; extradiscal line sinuous, 

 making a great curve before reaching the costa ; the wing between these two lines is darker than 

 the base or the outer edge of the wing, though the apical region is nearly as dark. In the 9 

 there is more gray in the basal part just beyond the extradiscal line and along the costa. A 

 slight oblique gray apical streak. Discal spot upsilon-shaped, or like a short T with long down- 

 curved arms; it is transparent, clear of scales, and of a most unique shape. Hind wings brown, 

 but pink at the base and on the costal region, but not on the inner edge of the wing. Discal 

 spot bright yellow, surrounded by a diffuse black ring, wider in 9 ; the yellow centered by a 

 much curved lunate black Line containing a narrow transparent clear lino; beyond, in the yellow 

 field, is a diffuse whitish streak. 



Under side of the fore wings tinged with deep carmine pink on the inner edge, otherwise as 

 above, including the discal spot. The hind wings beneath are in <? the color of a dead leaf, 

 mottled with light and dark fawn brown; 9 the same, but grayer and somewhat frosted, with 

 faint traces of a discal spot, represented by a minute curved dark line, including a few white 

 scales. 



In 9 the fore wings are much broader, with more gray scales on the costa and on the outer 

 side of the extradiscal line, and the pink at the base of the fore wings outside of the discal spot 

 is paler than in the cf , with more gray and white scales beneath and above, presenting a more 

 frosted appearance. 



Expanse of fore wings, <? , 42 mm.; 9 , 56 mm. 



Length of fore wing, o* , 22 mm.; 9 , 29 mm. 



Breadth of fore wing, c? , 10 mm.; 9 , 15 mm. 



Length of hind wing, o* , 14 mm.; 9 , 17 mm. 



Breadth of hind wing, o* , 10 mm.: 9 , 15 mm. 

 Geographical distribution. — Natal. 



Larva. — Length, 50-55 mm.; width of head, 5 mm. Head, dark chestnut red, rather 

 hairy; the hairs white. Body cylindrical, rather thick, ground color "yellowish white" (Faw- 

 cett) ; very hairy. 



Prothoracic segment with two low conical setiferous tubercles, one above and one below the 

 spiracle, but situated on the front edge; the median dorsal tubercles are obsolete as such, but 

 there are numerous setiferous warts. The hairs are rather long and thick, unequal in length, 

 scattered among the tubercles. There are four tubercles (eight in all on each segment) on each 

 side of the second and third thoracic segments, and three on each side of the abnominal segments. 

 All the tubercles are low, rounded, conical and densely beset with setiferous warts ; the setae are 

 of two kinds, those arising from the center or middle of the crown being long, white, rather thick 

 hair-like setae of unequal length and forming a thin tuft, the longest hairs nearly half as long as 

 the body is thick; the others are stiff dark, sharp poisonous spines, about a dozen radiating 

 outward from the edge of the crown of each tubercle. The abdominal tubercles are very 

 slightly smaller than the thoracic ones, but the spines radiate, and do not stand erect as in the 

 tubercles of some American Hemileucids. 



The two dorsal tubercles on the eighth abdominal segment are slightly higher than those 

 in front, but not so large as those on the ninth segment, and they are closely approximate, but 

 yet separate; they each bear from 10 to 12 black or pale radiating spines. 



Suranal plate short and broad, the hind edge rounded, the surface hairy; the white hairs 

 are of different lengths, arising from pits and minute warts. Near the hinder end are four groups 

 or pencils of long white (three to four) hairs, the four pencils arranged in a line extending across 



