Publ. 23. IX. 1932. 
HYBRIDS OF SPHINGIDAE. By B. Gehlen. 
161 
In addition to the hybrids of this group enumerated in Vol. 2, Pernold has singularly published new 
names without any description for 2 hybrids that were already known, viz: for G. hybr. g.schwandneri Kordesch, 
which he now denominates jacobsi, whilst for G. hybr. pernoldi (!) Jacobs he gives the name philip()si. 
C. Secondary Hybrids. 
C. hybr. ebneri Grosse (C. hybr. kindervateri Ivys. <$ x G. euphorbiae L. $) must be sub-divided into 
2 groups according to the appearance. The specimens of the one group (50 %) cannot be differentiated in any 
way from kindervateri and a further description is therefore unnecessary. Those of the other group show a 
marked difference: antennae grey with white tip or quite white. Body like that of euphorbiae, dorsal line some¬ 
times indicated. Wing contour and ground colour as euphorbiae. Costal area of forewings almost like kinder¬ 
vateri, but paler with indistinct edge and much paler than the oblique band. This has an irregular outer edge, 
shaped like that of euphorbiae with steep incline at hind margin. Outer costal spot forming an arc as in euphorbiae. 
Hindwings almost exactly like euphorbiae. Underside always more or less reddish. The full grown larvae 
look identically like those of euphorbiae, only the rudimentary or completely absent dorsal line reminds one 
of gallii. 
v> 
C. hybr. helenoides Grosse ( G. hybr. helenae Grosse G X G. hybr. helenae Gr. $) cannot be differentiated 
from typical gallii or helenae §§ with gallii characteristics. It is remarkable that this tertiary hybrid reverts 
to type in spite of the considerable differences in its secondary parents. Also the larvae are very similar to 
those of gallii in all stages. 
C. hybr. pseudogallii Grosse ( G. hybr. helenae Grosse <$ x G. gallii Rott. $) is very similar to gallii, 
but smaller than same. The pale middle area appears wider owing to the narrower costal marginal zone and 
the heavy incurving of the oblique band. The white anal spot of hindwings is much enlarged, the marginal 
area is paler and the median band, especially in the $$ is not so red. The dorsal line is well marked on all 
specimens. — The author wishes to lay stress on the fact, that this tertiary hybrid seems to prove that cross¬ 
breeding twice with the original type suffices to revert to same, viz: the hybrids cannot be differentiated from 
the type and in any case neither the larvae nor imagines show any traces that indicate the original female 
parent euphorbiae. 
C. hybr. zwerinai Grosse ( G. hybr. helenae Grosse A x G. euphorbiae euphorbiae $) closely resembles 
hybr. galiphorbiae, but differs from same by the narrower and reduced costal zone of forewings; the central 
area is faintly reddish. In contrast to galiphorbiae the underside is always red. It can easily be differentiated 
from hybr. ebneri with its euphorbiae- like wing contour, as its wing contour resembles that of gallii. Dorsal 
line either rudimentary or absent. 
C. hybr. bikindervateri Grosse (G. hybr. kindervateri Kys. x G. hybr. kindervateri Kys. §). Antennae 
and body darker than in kindervateri. Dorsal line reduced or absent. On forewings costal zone and central 
area like kindervateri, but the latter is more or less darkly shaded, similar to helenae. (This dark shading appears 
to occur frequently in secondary hybrids of the gallii and euphorbiae groups, as it occurs in helenae, kindergallii 
and casteki.) Oblique band very narrow anteriorly, then suddenly wider and expanding to the hind margin 
in such a way that in 2 cases it is more than half of the width of the latter. Outer edge of the band 
very irregular, partly dentate. Outer area darker than in kindervateri. Hindwings almost like those of helenae. 
C. hybr. bergeri Ehinger (C. hybr. densoi Musch. x G. euphorbiae L. $) forms 2 groups. The 
first inclines to the extent of 50% towards euphorbiae, especially in the $$. In the majority of the specimens 
of this group, the ground colour is dull pale grey-yellow. The oblique band is often narrow in its apical 
extremity and descends vertically to hind margin. The 2 outer costal spots are always present. The marginal 
area is wider than in euphorbiae and grey. Contour of forewings sleeker, that of hindwings similar to densoi. 
I he black submarginal band bolder than in euphorbiae. Black basal area reduced as in densoi and straighter 
outwardly, i. e. not so dentate as in euphorbiae. Antennae pure white. — In the second group, which inclines 
towards densoi, the two outer costal spots are generally confluent. The central area is dusky, occasionally 
more so than in densoi and some of the specimens can scarcely be distinguished from densoi. Underside dull 
grey-yellow, suffused with rose. 
C. hybr. turragallii Aust. (recte turagallii) (G. hybr. turatii Dso. £ x G. gallii Rott. $) has the 
appearance of a very pale discoloured galiphorbiae. Band of hindwings very pale yellow-red. Submarginal 
band narrow and irregular. White anal spot very small and with olive shading at the anal angle. Body pale, 
similar to that of galiphorbiae. Antennae white. Undersite white-grey. 
C. hybr. euphorbiae Aust. (G. euphorbiae L. <$ x G. hybr. hippophorbiae Dso. $) (= hybr. Isolde 
Pasold) reminds one of hybr. euphaes with a slight inclination towards euphorbiae. Body very similar to that 
of euphorbiae. Forewings pale yellow-grey; the middle costal spot larger and more boldly marked than in 
euphaes, almost as in euphorbiae. Oblique band almost like that of euphaes. Hindwings similarly almost 
Supplementary Volume 2 21 
jacobsi. 
ph ilippsi. 
ebneri. 
helenoides. 
pseudo- 
gallii. 
zwerinai. 
bikinder¬ 
vateri. 
bergeri. 
turragallii. 
eupho- 
phorbiae. 
