EUMORPHIN^E. 51 



pupa is similar to that of T. hippophaes, goes over the winter, the imagines 

 appearing at the same time as those of T vespertilio and T. hippophaes, 

 although an occasional specimen may emerge in September, the 

 pupa not going over the winter. Boisduval considered the $ parent 

 to be T. vespertilio, the $ T. hippophaes, but Bartel suggests that as the 

 supposed hybrid larvae were feeding on the foodplants of both parent 

 species, the reverse cross may also have taken place. He further 

 notes that the hybrid vespertilioides is separated from T. vespertilio by 

 the black instead of white spot on the cross-vein of the forewings, 

 the diagonal band, and the pale edges of the thorax. The ash-grey 

 ground-colour of the body and forewings, the darkened portion before 

 the diagonal band on the latter and the reddish spot at the anal 

 angle of the hindwings, separate at once the hybrid from T. 

 hippophaes and the other Deilephilid (i.e., Phryxid) species. 



4. Hyles hybr. eugeni *, Mory, "Mitt. Schw. Lnt. Ges.," x., p. 



341, figs. 4, 5, 6 (1901). — Imago : Scales on forehead and crown dark 

 grey to black-grey, a white lateral stripe ; palpi white, terminal joint dark 

 grey with a white stripe above. Antennae white, with reddish-brown pectinations. 

 Thorax above, bright to dark grey, below, bright to dark grey or rose ; patagia 

 whitish on the outer portion, white towards the head. Abdomen above, dull- 

 grey with a strong or weak dark olive-green tint ; two black lateral spots 

 on segments 1 and 2 behind each white patch ; some examples have white ring- 

 like marks on the abdomen ; beneath, the abdomen, like the thorax, is variously 

 coloured. Forewings, with the ground-colour bright grey ; the border of the oblique 

 band darker grey, the latter in form like that of H. hybr. epilobii; outer marginal 

 band darker grey, narrow, in clear contrast with the ground - colour ; the spot 

 on inner margin dark grey, coalescent with the black basal spot, both forming 

 together a large blackish basal spot ; a patch of white hair beside this spot on 

 inner margin and also above it at base of wing ; the third dorsal spot absent 

 (one example, fig. 4, with the forewings entirely dark grey). Hindwings with 

 the ground-colour as in T. vespertilio or slightly darker red, basal spot spreading 

 more or less towards disc of wing ; the spot on the anal angle very pale, almost 

 white ; marginal band at a great distance from the fringes (in one example, in 

 coll. Standfuss, quite as far as in H. hybr. epilobii) ; the space between fringes and 

 marginal band with grey or rose-coloured scales. Fringes of forewings on outer 

 margin dark greyish-brown, paler on inner margin ; of hindwings white. Under- 

 side of wings with a bright to dark reddish ground-colour ; lateral margins 

 of disc grey ; base of forewing grey, the dark grey spot on the transverse 

 nervure visible corresponding with the second dorsal spot of upperside. 

 Larva : [15 larvae taken with 200 typical larvae of T. vespertilio are assumed to 

 be hybrid on the following characters : Caudal horn short ; variable in colour 

 and markings, especially after last ecdysis.] - The fifteen larvae were then diagnosed 

 as: (1) Ground colour bronzy- green ; caudal horn present. (2) Ground colour 

 black ; caudal horn present. (3-4) Ground colour bright bronze, reddish spots 

 behind the yellow oblong lateral spots, the venter and prolegs red (more intense 

 than in vespertilio) ; caudal horn present. (5-7) JVJediodorsal reddish stripe 

 from head to anal flap ; lateral spots and prolegs reddish, venter red, without 

 caudal horn. (8) Ground colour black ; oblong spots rosy ; reddish dorsal 

 stripe and prolegs, above the latter a row of white spots ; small caudal horn. (9-10) 

 Venter and dorsal stripe red ; oblong spots ringed with black on the anterior 

 half of larva, with red on the posterior half; caudal horn present. (11) Like 

 vespertilio, but with caudal horn. (12) Colour of the oblong spots reddish, 

 venter and prolegs red ; without caudal horn although a distinct hump is 

 present. (13)' Colour black, small caudal horn. (14-15) Not different from 

 vespe?~tilio larva. 



Mory's facts may be summarised as follows : 15 young larvae 

 taken among 200 typical larvae of Thaumas vespertilio, in early June, 



* Assumed parentage, $ epilobii X ? vespertilio. Until this is proved 

 by crossing and breeding, most of Mory's speculations must be considered as 

 very doubtful. 



