480 Explanation of Plates. 



Explanation of Plates. 



Plate LXIX, fig. 1, P. eros, lan^a in third (hibernating) stage 

 natural size. 



Figs. 2, 3, 4. Three figures of third stage larvae enlarged, the 

 brownish coloration of figs. 3 and 4 is especially characteristic of 

 P. eros in this stage, in comparison with the same stage larvae of 

 P. icarus and A. ther sites, which I was rearing at same time and so 

 could compare them. 



Figs. 5, 6, 7. Fourth stage larvae (after 1st spring moult) much 

 enlarged. 



Plate LXX, figs. 8-13, last stage (5th instar) larvae, much enlarged 

 (about X 5). 



Figs. 8 and 9 from the large well-coloured and well-marked larva. 



Figs. 10, 11, 12. From duller and more uniformly coloured larvae. 



Fig. 13, one of the larvae that ceased growing early and appeared 

 to be full-grown whilst still much smaller than those figured 8-12. 

 These larvae being all collected, there was some doubt whether some 

 of these might be icarus or some other species, however 8-12 all 

 proved to be eros, those represented by fig. 13 were all ichneumoned 

 and were also doubtless eros, so that all the larvae found on 

 Oxytrofis campestris were eros. 



These figures, as reproduced, do not do full justice to Mr. 

 Knight's drawings. They fail especially in making the eminences 

 of the dorsal flange on each segment smoothly rounded instead of 

 somewhat angular, in making the eminences of the lateral flanges 

 similarly rounded instead of flattened except just at the incisions, 

 and in giving in some cases an appearance of smoothness contrary 

 to the rough surface due to the hairs and hair-bases. They do 

 nevertheless give a very good idea of the colour and general aspect 

 of the larvae- 

 Plate LXXI, fig. 14. Eggshells of P. eros* x 40. 

 Plate LXXII, figs. 15, 16, 17. Three examples of the micro pyle 

 of the egg of P. eros x 350. 



Plate LXXIII, fig. 18. Skin of first stage larva x 80. 



* Selected as least injured by larvae in hatching. 



