NOTES ON CALLOPHRYS AVIS. 247 



The white line beneath varies a good deal, it fades towards the 

 hind margin, so that one may be in doubt in many instances whether 

 to say, for example, it extends to vein 7 or to vein 2. There are 

 several specimens in which it is absent from the forewing ; there is 

 always one spot on the hindwing, and it usually extends down four 

 interspaces, perhaps to be reported as visible, but hardly so, for several 

 further spaces in most examples. 



The dark margin to inner side of the white spots so usual in C. ruhi, 

 is present in a few 2 s of C. avis on the forewings, distinct only in the 

 interspace between veins 2 and 3 as a brown shade, never on the 

 hindwings, and onlj' faintly indicated on the forewing in front of the 

 space 2-3 in the few cases where it is present. 



Mr. Main's photographs of the underside of the living butterfly 

 bring out well the peculiar velvety smoothness of aspect of C avis 

 when alive, as contrasted with the more crisp and sharp appearance 

 of C. nihi. 



I noticed that though Coriaria is the foodplant of C. avis, and that 

 the larva could not be got to eat any of the ordinary foods of C. ritbi, 

 it was, nevertheless, the case that Coriaria did not grow at Hyeres, 

 although ( '. avis occurred there. The conclusion, of course is, that 

 C. avis must have some other foodplant. Last spring (1910) I spent 

 several weeks at Hyeres, with a view, so far as entomology was 

 concerned, of finding out something about this. Unfortunately, the 

 season was unpropitious, even ( '. nibi, though on the wing all the 

 time, was often invisible, and scarce even in places where I have seen 

 it abundant. I failed to find a specimen of ('. avis, so that the only 

 result of my search was confirming the fact that Coriaria did not grow 

 there, a fact that the local botanists had sufficiently established, and 

 the question of the alternative foodplant remains for the future to 

 solve. 



It seems desirable to note an imperfection in pi. xv. (Trans. 

 Ent. Soc. LomL, 1910), since it is of some importance. It is that of 

 the coloured drawings of the larva, in which Mr. Knight's drawings show 

 certain oblique shadings, bringing out very well the undulating surface 

 of the " slope." In the plate these shadings are accentuated, so 

 that, in the right upper figure especially, they rather show markings 

 than mere shadings to bring out humps and hollows. This is un- 

 fortunate, since the fact is that there are no oblique markings on the 

 larva of C. avis, a circumstance (with others) sharply distinguishing it 

 from that of C. mbi. 



I have heard from Professor Mendes (Sao Fiel) that he has 

 received a specimen of C. avis taken in May, 1910, at Jerez. 

 Through Mr. C. Oberthiir and Mr. H. Powell, I have been in 

 communication with Mr. E. Holl, from whom I learn that he has a 

 series of C. avis taken near Algiers. He has a specimen ( $ ) taken at 

 Ben- Aknoun, April 6th, 1904. This year he took a number at Maison- 

 Carree from April 20th to May 1st. He thought they were a form of 

 C. rubi var. fcrvida, being struck by the difference of the streaks and 

 spots, and especially on account of their late appearance, April 20th, 

 at about 120ft. above sea level, whilst at P)onzarea (about 1200ft.), 

 C. riibi was taken end of March and l)eginning of April. 



The specimens are smaller than the P>ench ones, 28mm. to 30inm., 

 the 9 from Ben-Aknoun, 32min., they resemble Oberthiir's fig. 420 



