99(5 



or modification, separated from each other by two narrow, very 

 light intervals. 



Along the onter side as well as toward the wing-root these three 

 bars are accompanied by rows of dark spots. The row at the mai-ginal 

 side represents the big semilunar blotch, which occurs on this same 

 place in other species of Smerinthus, and forms the homologue of 

 the corresponding patch al the outer margin of the fore-wing, which 

 occurs in ocellata as well as in numerous other species. We here 

 find the convincing proof that this dark marginal area is formed by 

 the coalescence of a row^ of spots. The middle row of the three 

 ribbons of dark spots is evidently double, its members foiining a 

 series of square blocks, whose inner and outer side are formed by 

 dark strokes, sometimes straight, in other cases slightly curved. The 

 onter of these border-strokes are the darkest. The comparison with 

 populi proves that these dark strokes represent bar II. As '\]\ populi, 

 this bar is therefore accompanied at both sides by a dark seam. 

 The one on the outer side is much broader, darker and more inde- 

 pendent than the seam on the inner side. The latter is separated 

 from Row HI by the innei- white band, this row only forming 

 a narrow line, connected by a dark interspace with the very dark 

 and complete Bar IV, which runs along the outei- side of the light 

 discoïdal marking, in the same way as in popii/i 



On the under side of the fore-wing the same spots and bars can 

 be found, with the exception of Bar IV, which remains entirelj* 

 concealed under the wine-red haiiy covering of the loot-field, just 

 like the posterior |)art of Bar III. It is only the discoïdal marking, 

 which maintains itself as a small whitish patch in the middle of this 

 reddish covering. 



But also on the upper surface of the hind-wing traces of these 

 same bars may be noticed, viz. along the front border, on that part 

 of the wing that remains hidden under the fore-wing during Might, 

 but is protruded in front of it during rest, in consequence of the 

 peculiar attitude of fore- and hind-wing in regard to each other. 

 On this part three dark double-lines run backward up to near the 

 beginning of the red hue, and there end blindly. To my view thei-e 

 is no reasonable ground for the supposition, that these vestiges of 

 pattern should have secondarily crossed over tVom the fore-wing to 

 the freelj' protruding part of the hind-wing. On the contrary it 

 seems justified to assume, that they belong to the primary pattern 

 of the hind-wing, as well as their homologues on the under side, 

 or those on the upper side of the hind-wing of popu/i, and have 

 remained untouched by the red discoloration. 



