LÉPIDOPTÉROLOGIE COMPARÉE 45/ 



détails, the most that one can say, is that the gênerai trend of the 

 variation is away from hirtaria, but it is fair to argue, from the 

 analogy to denhami, that it is toward grœcaria. 



Habits of larvae. 



As the habits of grœcaria larvas are the same as those of 

 zonaria, derived in ail probability from a similarity of habitat 

 amongst low plants, such as yarrow {Achillea Millefolium), 

 Bird's foot Trefoil (^Lotus corniculatiis), etc..., the habits of 

 buloveci, both in regard to resting, falling when disturbed, and 

 so on, are exactly like those of denhanii. It is therefore unne- 

 cessary to repeat them hère. After burying for pupation, bidoveci 

 however, are more inclmed to dry up without change in this 

 climate, possibly on account of our low average température in 

 June. 



Pupae. 



The size of the pupae is between those of the two parents, but 

 it is nearer grœcaria. The shape, too, is that of this species, for 

 it is short and dumpy, and not long as in hirtaria. The pitting 

 on grœcaria is very coarse, whilst in hirtaria, the pits are very 

 numerous. The hybrid pupae combines thèse two characteristics. 

 There is no sign of the dorsal vessel. 



Viewed from the side, it is seen that the 3rd abdominal seg- 

 ment is much the broader, and from this, the body outline curves 

 regularly in both directions, although there is a slight break in 

 the continuity of the curve posteriorly, due to the somewhat 

 detached appearance of the last two segments as in grœcaria. 

 Looked at from above, again the 3rd abdominal segment is the 

 broadest, and the thorax narrows gently from it, instead of being 

 almost parallelsided as in hirtaria. 



The two side spines on the anal armature are alike in both; 

 in bidoveci, the base of the terminal spine is very broad and 

 tapers rapidly to the two fine forked spines. 



