294 THE ENTOMOLOGIST. 



from the Wallis canton. Fig. (> represents a light yellowish-grey 

 coloured male quite divergent from both parents. 



If the females of seileri are somewhat more thinly covered 

 with scales than the corresponding sex of luctuosa, they certainly 

 have not nearly such transparent wings. The females figured at 

 Nos. 2, 4, and 5 are altogether different from their appearance 

 on the plate, as the spots and stripes are really almost as clearly 

 recognisable as in the male figured at No. 1. In the whole 

 arrangement of the wing-patterns seileri inclines more to sordida, 

 except that all the spots and stripes are much more sharply 

 marked, pretty nearly as in luctuosa. On the fore wings there 

 are three rows of spots, proceeding from the costa at equal dis- 

 tances, parallel to one another, and not notably sinuately 

 diverging, as is the case in luctuosa ; a fourth shorter row of 

 spots arises at the apex itself, and runs obliquely towards the 

 outer of the three parallel rows of spots. Along the outer margin 

 are also five more or less recognisable black spots. 



The hind wings appear darker than the fore wings, and bear 

 (as well as the distinct spot on the cell) black longitudinal stripes, 

 which commence at the base of the wing, and end at the seven 

 dark spots situated before the margin ; the latter are placed as 

 in luctuosa. On the under side of the fore wings the dark mark- 

 ings extend into the inner margin ; on the hind wings all the 

 spots and stripes are marked still more sharply than on the 

 upper side. The under side of the body and the legs are light 

 grey, the tibiae yellowish, but not reddish yellow as in luctuosa. 



The other examples of seileri vary among themselves pretty 

 strongly, apparently, in colouring, thickness of scale-covering, 

 and distinctness of markings ; some individuals lean towards 

 luctuosa, the majority more to sordida. 



The males and females of seileri were quite capable of repro- 

 duction in their pairing with one another. From five copula- 

 tions, all of which were fertile, one hundred and eighty eggs 

 apiece were produced on an average ; from every one of these 

 nine hundred eggs there hatched out a sprightly caterpillar ! 

 Reciprocal crossing between seileri ? on the one side, and sordida 

 $ or luctuosa 3 on the other, also produced, in each single case, 

 approximately normally fruitful broods, for there were scarcely 

 17 per cent, of the numerous eggs sterile. On the other hand, 

 the crossings between seileri $ and sordida ? or luctuosa 2 (alas ! 

 successful in two cases only) were but incompletely fruitful, for 

 the thirteen larvae hatched out of four broods broke down before 

 the first skin change. 



Lastly, a pairing was accomplished between seileri ? and 

 mendica var. rustica, Hb., $ . The result was akin to that which 

 I have recorded from the combination of sordida ? or luctuosa 2 

 and rustica J . The eggs were only very slightly fruitful, and, 



