HYBRIDS OF SPHINGIDAE. By B. Gehlen. 
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C. hybr. Juliana Rbl. (P. elpenor L. <$ x G. hybr. epilobii Bsd. $) generally speaking inclines towards juliana. 
elpenor. Antennae white on upperside, yellow-red below. Thorax olive-green with red longitudinal streak. 
Posterior edge of collar and tegulae pure white. Abdomen unicoloured olive-green on upperside without longi¬ 
tudinal streak, laterally red. Only a single deep black lateral mark. Half the costal marginal zone and oblique 
streak of forewings are olive-green, the rest of the surface is red. Hindwings pale red, never so brilliant as in 
elpenor. Black basal spot narrower. Black submarginal band always more or less present. Anal angle paler, 
but never white. Underside rosy fed with olive-green. Differs from elpenor by the pure white antennae, absence 
of the dorsal line on abdomen, olive-green costa of forewings, absence of the white stigma and the much more 
prominent oblique stripe of fore wings. 
C. hybr. vesperdiana Hornst. (C. hybr. pernoldiana Aust. $ x G. vespertilio Esp. $). According to vesperdi- 
outward appearance the specimens can be divided into 2 sharply distinct groups. In the 1st most striking group anu 
the forewings are grey inclining towards ochreous yellow and of almost uniform colouration. Basal and costal 
spots, as well as the oblique stripe are extinct, whilst the oblique band that is usually darker, appears here to 
be paler, being an ochreous yellow on the greyish ground. At base of forewings there is a grey-black spot 
that turns to whitish grey at hind margin. In centre of wings there is an obsolete dark spot and inwards of 
same a white-yellow mark. Hindwings like those of vespertilio, but the marginal stripe is somewhat wider, 
the red darker. Body pale yellow-grey, grey on thorax and laterally whitish grey. Antennae yellowdsh white. 
Unterside dull reddish with grey-violet sheen. — The specimens of the 2nd group look like very dusky epilobii 
nevertheless with distinctly visible euphorbiae markings on fore wings, however not olive-grey, but grey. Basal costal 
spots and oblique band diffuse. Also in this group the hindwings are like those of vespertilio, the anal spot 
is deep rose. The band is often very wide and intensively black. Body grey-olive-green, with pale grey edges 
on thorax. Abdomen often with 3 black lateral spots. Antennae white. Underside grey-rose with blackish 
shading, very like vespertilio. 
C. hybr. kostiali Ehinger (G. hybr. bergeri Ehinger X G. euphorbiae L. $). The progeny of a crossing kostiali. 
of an euphorbiae like <$ of hybr. bergeri could not be distinguished from typical euphorbiae. From a crossing 
wdth a hybr. bergeri which had faintly dusky forewings, 62 specimens were produced, all of very good size. 
Of these 35 had very dusky forewings; the duskiness of forewings through the olive-green scales exceeds that 
of bergeri, in fact it surpasses that of densoi and generally contains the atavistic central line. 41 specimens 
retained a purely euphorbiae type and 14 formed a transition of bergeri to euphorbiae. If one considers that 
the kostiali hybrids were of 7 / 8 euphorbiae extraction, the result is remarkable. 
C. hybr. 1 offleri Ehinger ( G . kostiali Ehinger $ x G. euphorbiae L. $). I could not find a description loffleri. 
of this quartiary hybrid. At the time of publication only one $ was in existence from the copula. 
C. hybr. pseudophorbiae Hornstein (G. euph. euphorbiae L. G X G. hybr. pernoldiana Aust. $) resembles pseudo- 
euphorbiae L. to an extraordinary degree, differing by the sleeker shape of the body and more pointed wings. phorbiae. 
Central area sometimes suffused with grey and the costal zone more diffuse. Hindwings more extensively 
rose. Outer margin narrower. 
C. hybr. kindertanica Gehlen nom. nov. (= zwerinai Vlach., nom. praeoccup.) (G. hybr. kindervateri kinderta- 
Kys. 3 x G. euph. mauretanica Stgr. $) resembles mauretanica, but the hindwings are narrower and red-brown nica - 
instead of carmine. Head, antennae and thorax like euphorbiae. On abdomen a row of white spots reminds 
one of gallii, whilst on account of the heavier white edge to the last abdominal segments one is reminded of 
kindervateri and galiphorbiae. 
P. hybr. degenerata Kotzsch (P. hybr. luciani Dso. x G. euphorbiae L. $) is smaller than elpenor degenerata. 
(expanse 46—55 mm) and inclines in its markings towards euphorbiae, but the dark central line on forewings 
is mostly present, as in harmuthi, gschwandneri, gillyi etc. Ground colour of upperside reddish like elpenor, redder 
than in luciani. Oblique band relatively narrower than in euphaes Dso. The large costal spot larger than in 
galiphorbiae. Basal spot less developed than in euphorbiae. Abdomen olive-green on upperside, red below with 
a single black lateral spot. Antennae white. Underside of wings reddish. 
P. hybr. elpenorides Kotzsch (P. hybr. luciani Dso. <$ x P. elpenor L. $) differs little from elpenor. elpenorides. 
Ihe red marking is bolder and more extensive. The red margin of hindwings on the other hand is narrower 
and on underside the red margin of forewings is wider and towards the apex it does not approach the outer 
margin. 
P. hybr. stollei Zoological Institute, Vienna. (P. hybr. luciani Dso. $ X P. porcellus L. $) is generally stollei. 
smaller than porcellus. The colouring and marking characteristics are as different as in hybr. luciani Dso.. 
so that it is difficult to describe a type. All specimens vary and partly revert to the forms of the primary hybrid. 
Of the two delicate oblique lines traversing the forewings, the outer one always extends to the costal margin, 
whilst the inner one generally diffuses in the costal zone, which is usually porcellus like and reddish or greenish- 
ochre. Hindwings as a rule are like porcellus, but as is seen from the illustrations, specimens occur having 
an almost monotonous olive-grey hindwing without black basal and costal zones and no submarginal band. 
The white lateral spots in the anal region of abdomen are almost always present. 
