386 LÉPIDOPTÉROLOGIE COMPARÉE 



bears a very much less developed covering of darker hairs, which 

 are less conspicuous than those of either parent, for what hirtaria 

 loses in colour, it gains m quantity. 

 Wing expanse 25-35 ^^i^- 



Variation of imago. 



The gênerai trend of the variation of harrisonï and den- 

 hami cf CT is exactly the same, but the suffusions in harrisonï 

 never cover the whole of the ground of the wings except the 

 subterminal white band, as they do in dénhami. 



The direction of the variation in the females has been discussed 

 above and is therefore not repeated hère. 



Teratological spécimens. 



A) Mâle. I. The first spécimen is quite normal on the right 

 side and in the hindwing of the left side, but the left forewing 

 is slightly shorter than the right one. The markhigs are almost 

 normal before the second Kne, but after it, owing to the fact that 

 the second line is displaced and runs almost directly to the apex, 

 the other markings are forced out of their ordinary path and tend 

 to fuse at the upper margm. 



A regularly curved portion of 3,5 mm. length and i mm. depth 

 is hollowed out of the costa just before the termen is reached. 



II. The second spécimen (See PI. A, Fig. 11) is an extraordi- 

 nary looking object, and is figured. The left side is quite normal 

 but both of the right wings are affected in the same way. The 

 forewing is somewhat irregularly trumpet shaped, owing to the 

 grouping of ail the veins including those of the cell, together, 

 in one horny mass for one third of the length of the wing. For 

 this portion the costa is rounded and marked out in black. Simi- 

 larly the inner margin is hollowed out to form an almost perfect 

 semicircle with one end of the diameter at the base of the wing, 

 and the other at the anal angle. After this area, the veins are 

 almost of the usual form although vein I seems to be obsolète 



