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



vesperlilioi- C. hybr. vespertilio'ides Bdv. (43 b) (Celerio hippophaes hippophaes Esp. ^ x Celerio vespertilio 



^^^- Esp. $). In facies very similar to hybr. vespophaes, but the median area more extended pale, the costal border 

 narrower, and the entire colouring somewhat lighter. The oblique band is more distinct than in vespo- 

 phaes. The atavistic line running from the posterior costal spot to hind margin almost parallel with the inner 

 edge of the obliciue band appears to be present in some specimens. The discocellular dot is present and beside 

 it there are traces of the smear-like middle costal spot derived from hippophaes. ■ — The ground-colour of the 

 larva is apparently lighter and of a more greenish tone than in vespophaes; there is a distinct line at the stig- 

 mata which is white and light red. Food-plant: Epilobium. — Whether this hybrid ought not perhaps more 

 amelia. correctly to be called ameUa Feisth., can only be decided by breeding in captivity, which has yet not been carried 

 out sucessfully. 



gillmerl. C. hybr. gillmeri Rebel (43b) {Celerio lineata livornica i^. o or $ x Celerio zygophyJU 0. $ or (J). Costal 



margin of forewing broadly brown. The small black discocellular spot is placed m a light yellowish brown patch. 

 The median band is, like that of livornica, reduced to a narrow light yellowish brown band pointed at the 

 apex and broader posteriorly at the hind margin near the base. The brown oblique band is slightly curved 

 proximally and reaches hmd margin between middle and base. Its outer edge is not dentate, but nearly 

 straight as in livornica. The veins are partly pale, especially within the oblique band. The hmdwing have 

 a broad black basal area, a pronouncedly red median band which bears a distinct white patch near anal angle, 

 and a broad black submarginal band which is distally bordered by a slightly red marginal area. The thorax 

 and head are prominently white-hairy at the sides, and the patagia bear a broad white border. There are 2 

 pairs of black and white abdominal spots, and the edges of the segments are slightly white. The underside 

 is feebly yellowish pink, being more brownish at the costal margin of the forewing and the distal margins 

 of both wings, bearing here small but thick striae. The basal area of the forewing has a trace of black 

 hair, and the dark cloud which corresponds to the middle costal patch of the upperside is distinctly marked. 

 — One specimen caught at light at Posen. 



dijotamca. P. hybr. elpotailica Denso (Pergeso elpenor elpenor L. (^ x Celerio euphorhiae mauretanica Stgr. $). 



Very closely resembling hj-br. pernoldi, the differences being exactly those which might have been expected. 

 Colour of forewing red and olive-green, differing from pernoldi in the costal margin having a broader olive-green 

 border and in the olive-green oblique band being more basal at the hind margin. The different colours con- 

 trast more than in pernoldi. The black discocellular dot is usually present. The hindwing has a very large 

 black basal area, then follows a bright red transverse band M'hich is white towards anal angle and is distally 

 bordered by a black-green submarginal band less strongly developed than in pernoldi. The very narrow marginal 

 area is red. The underside of the wings is much paler red than in pernoldi, the pair of olive-green transverse 

 lines much weaker, and the black hair extending from the base of the forewing outward has disappeared. — • 

 Larva verj'^ similar to that of pernoldi, but the subdorsal line is usually indicated by slight reddish tint. — • 

 Obtained in captivity. 



pernoldi. P. hybr. pernoldi Jacobs (43 c) {Pergesa elpenor elpenor L.<^ x Celerio euphorbiae euphorbiae L. $). This hybid 



veiy closely resembles the inverse cross, hybr. harnndhi, but inclines more towards elpenor. That is especially 

 noticeable in the position of the oblique band, which is less close to the base at the hind margin and therefore 

 appears more straight. The atavistic line which runs from the apex to hind margin is almost exactly parallel 

 with the oblique band, the outer costal spot is no longer distinct in the dark border of the costal margui. — 

 The larva is very variable, being mostly dark blackish brown, with smaller or larger yellow subdorsal spots. 

 A slight red dorsal line is usually present, as well as the small yellow pencillmg derived from euphorbiae . The 

 horn is feebly curved. The colour of the venter is usually paler than the ground-colour. — Obtamed in captiv- 

 ity, but apparently also occurs in nature. 



clpogallii. P. hybr. elpogallit Castek {Pergesa elpenor elpenor L. $ x Celerio gallii gallii Rott. $). Accordmg to the 



origmal description this hybrid resembhs elpenor in markings and gallii in colouring. The red colour of elpenor 

 is represented only by a very slight suffusion. The oblique band projects very far basad, so that only a narrow 

 space remains between it and the atavistic line which runs from the apex nearly parallel with the proximal edge 

 of the band. The hindwing has a broad black submarginal band, the marginal area being very narrow. The 

 transverse band is uniformly reddish, but pale at the anal angle. Markings of underside as in elpenor, but the 

 colour more yellowish. — Larva varying from light grey through olive-green to black. Thoracical segments 

 but little swollen, subdorsal spots pale yellow, irregular in .shape, best developed on the anterior segments, 

 but sometimes partly or even entirely absent. Horn larger than in elpenor, usually red with black tip. • — So 

 far only obtained in captivity. 



f/ilhji. P. hybr. gillyi Kysela (43 c) {Pergesa elpenor elpenor L. ^ x Celerio vespertilio Esp. 9). According to 



the description given by the author the gnmnd-colour of the forewing is greyish olive-green; the oblique band, 

 which is somewhat darker, resembles that of elpenor and is bordered with dark greyish olive. The costal margin 



