HYBRIDS OF SPHINGID^. By Dr. P. Dexso. 269 



grey-green as far as the small dark smear (presumably homologous to the outer costal spot) situated et-''/4, then 

 reddish grey to the apex. The white discocellular dot of elpenor is here grey or absent. The two red stripes 

 of elpenor (presumably the median projection of the basal area and the space between the oblique band and 

 the atavistic line running parallel with its inner edge) are here greyish violet, the marginal area is lilac grey, 

 being violet towards the fringe. The hindwing is dark rose-red with a tinge of lilac. The basal patch black 

 as in elpenor, the marginal band dark grey and rather far from the margin terminating before reaching the 

 light rose-red anal spot. The antennae are red beneath, whitish above. The red stripe between the patagia 

 characteristic of elpenor is but feebly marked. The red dorsal line absent or vestigial and diffuse. One pair of 

 black side-spots is present. — ■ The larva is said to differ but slightly from that of elpenor; the moons in 

 the ocelli are described as being orange-yellow instead of whitish grey, and the head, anal tergite and claspers 

 as reddish. The horn is straight and very short. — Only obtained in captivity. 



P. hybr. irene Dense [Pergesa elpenor elpenor L. (^ x Celerio hippophaes hippophaes Esp. $). Costal Irene. 

 margin broadly olive-green, lilac pink at apex. The atavistic line running from the apex to the hind margin 

 almost parallel with the proximal edge of the oblique band olive-green and distinct. The black discocellular 

 dot always present. The olive-gi'een oblique band is apically incurved, a character derived from hippophaes, 

 and extends nearer to the base at the hind margin than in pernoldi. Basal, central and marginal areas lilac 

 pink. The hindwing has a broad black basal area, upon which follows the bright red median band, whose anal 

 portion has a slight pink tone. The submarginal band is very diffuse, blackish olive-green, united at the 

 costal margin with the basal patch and posteriorly gradually fades away. The underside of the wings is red, 

 the forewing bearing a black basal smear, and the two parallel lines derived from elpenor are indistinct. — The 

 full-grown larva is green or black-brown, with paler subdorsal line, distinct yellowish green subdorsal spots 

 on the segment which bears the horn, and feebly marked small ring-spots on the thoracical segments in the 

 place where the ocelli of the elpenor-l&vva, are found. The thoracical segments are slightly swollen, but much 

 less so than in elpenor. — Only obtained in cajDtivity. 



P. hybr. luciani Denso (43 c) [Pergesa elpenor elpenor L. ,^ x Pergesa porcellus L. $). Costal margin luciani. 

 olive-green variegated with red, apically red. The atavistic line running from the apex to the hind margin 

 almost parallel with the inner edge of the oblique band, and the middle costal spot dark olive-green. Marginal 

 band olive-green, its apex distinctly curved towards the costal margin. Basal, central and marginal areas dull 

 pink. Hindwing with a broad black basal patch and very broad reddish grey marginal band, between which there is 

 only a narrow yellowish red transverse band. Abdomen with one pair of greyish black lateral spots. — The 

 full-fed larva greyish brown, with light ocelli. Horn short. — Found in nature and also obtained in captivity. 



P. hybr. standfussi Bartel (43 c) (Pergesa porcellus L. ,^ x Pergesa elpenor elpenor L. 9)- On the whole standfussi. 

 more brightly coloured than hybr. luciani; the oblique band very rarely curving towards costa and then very 

 indistinctly. The atavistic line from apex to hind margin reaches the latter Jiearer the base. Hindwing more 

 deep pink, marginal band much less developed than in luciani. The underside of the wings is red, with broad 

 black basal area on the forewing. Scheme of markings more resembling that of porcellus. Abdomen without 

 side-spots. — Larva darker than that of luciani. The ocelli with dull diffiise pupil. — Found in nature and also 

 obtained in captivity. 



C. Secondary Hybrids. 



C. hybr. sec. ord. pernoidiana Aust. (Celerio hybr. epilobii Bdv. ^J x Celerio euphorbiae euphorbiae L. $). pernoldiana. 

 Resembles euphorbiae so closely that a specimen found in nature would hardly be recognised as a hybrid; but 

 the caterjaillar might perhaps reveal itself as a cross on account of its characteristics. The costal margin is 

 usually somewhat darker than in euphorbiae, the outer costal spot is only slightly indicated or absent. The 

 atavistic line running from the apex to the middle of the hind margin appears to be rarely marked, while 

 the line which runs to the hind angle parallel with the distal margin is frequently visible. The olive-green coloiir 

 of the markings is somewhat duller than in e(/;j/(o/6«'ae, but the ground-colour of the same tone as in that sjjecies. 

 The hindwing also does not offer any noteworthj^ distinction. The underside is uniformly pale red, much lighter 

 in tone than in euphorbiae, and bears scarcely any traces of markings. — Only obtained in captivity. 



C. hybr. sec. ord. eugeni Mory (Celerio hybr. epilobii Bsd. S x Celerio vespertilio Esp. $). This hybrid eugeni. 

 occurs in 3 forms according to Mory, which represent intermediate stages between vespertilio and hybr. epilobii. 

 The description of the principal form is as follows: Forewing light grey, laterally of the oblique band darker 

 grey, the band as in hybr. epilobii. A narrow dark grey costal border. Basal and central costal spots dark grey, 

 outer one absent. Hindwing; the red colour of the oblique band as in vespertilio, spot at anal angle very pale, 

 almost white, marginal band distant from margin. The underside of the wings is a lighter or darker reddish 

 tone, with the base of the forewing grey. At the cross-vein a dark grey spot, which corresponds to the middle costal 

 spot of the upperside. A second form, of which only one specimen was obtained, has all the grey colour of the 

 prmcipal form replaced by olive-green. The third form has the forewing uniformly grey, being very similar to 



