20 Dr. T. A. Chapman on 



I must note that most of my measurements were made 

 from the insects as set, and are probably two or three mm. 

 too small. I notice that Ruhi's measurements quoted seem 

 small, and I suspect were made in the same way (from tip 

 to tip) in insects with the wings much advanced and 

 therefore in some cases quite five mm. too small. 



I add also a note of the varieties of the three species 

 known to me from Spain. 



I was successful in getting both E. stygne and palarica 

 to lay eggs freely by sleeving them over grass. 



Unfortunately, being on the move prevented my making 

 such notes of the eggs and young larvae as I should have 

 liked. I sent a number of eggs to Mr. H. Powell, of 

 Hyeres, whose knowledge of Satyrid larvae is more extensive 

 than that of any other of my entomological friends. I 

 append his notes and my own. The difference between 

 the eggs struck me at first as being considerable, the one 

 have the minute dots that form the coloured patches in few 

 and large groups, the other in smaller but more numerous 

 ones : this conclusion was reached on the first eggs laid by 

 each species, and were those of one female of each. Later 

 when I got eggs laid by several others, I found that these 

 differences were not specific but individual. Each female 

 laid eggs all alike in these markings, and differing more or 

 less from those laid by others, but each species seemed to 

 have practically an identical range of variation in this 

 respect. 



Mr. Powell agrees with me in two points. First, the 

 eggs of the larger species are rather the smaller, and, 

 secondly, there would be no difficulty in separating the newly 

 hatched larvae of the two species if mixed. Curiously, 

 however, Mr. Powell says that the larva of polaricd is 

 darker than that of stygne (though he says that within the 

 egg it is lighter), whilst I note the pale lateral stripes as 

 being rather paler. I agree with him, however, in the 

 stripes being better marked. 



I agree with him also in another point that is probably 

 of considerable importance. I supplied both larvae with a 

 grass (Festuea ovina, or something like it) from stygne 

 ground, and stygne did well on it, and when (at La 

 Granja) I had to find a substitute (I fancy another var. of 

 the same grass), they ate that also, and I succeeded in 

 bringing them home, and believe I have some alive now 

 (Dec. 1904). The palarica, however, did badly on the 



