348 THE ENTOMOLOGIST. 



Out of the two hundred and seven resulting imagines, there 

 were only ten gynandromorphic specimens, all of which were 

 not so characteristically developed in their gynandromorphic 

 condition as the majority of the gynandromorphic specimens 

 already mentioned (PL III. fig. 8).^ To how many broods these 

 ten specimens belong, and how they are distributed among the 

 broods, I cannot exactly say. The whole of the two hundred and 

 seven specimens were reared from nine pairs. 



4. With the male of the same hybrid, that is — between S. 

 pavonia <? and sjnni ? — only two back crosses with S. spini 2 have 

 succeeded. From these developed 94 and 98 per cent, larvae, 

 but, on account of bad weather, all died except four. 



The four imagines — two males and two females — were sexually 

 normal, without a sign of gynandromorphism (PL III. figs. 4, 5, 

 and footnote ^). 



5. The crossing of this same hybrid male with S. pyri ? No. 14, 

 was in three cases infertile, most probably on purely mechanical 

 grounds, on account of the great difference in size of the insects. 

 Two other copulations resulted in 8 and 94 per cent, offspring 

 (PL IV. figs. 1, 2, and footnote *). Unfortunately, on account 

 of bad weather, most of these died of infectious disease. Of the 

 well-developed nine imagines, none were gynandromorphic. 



It must be emphasized that the gynandromorphic specimens 

 obtained were principally female in character. 



(To be continued.) 



NOTES AND OBSERVATIONS. 



CoLIAS EDUSA, C. HYALE, AND AcHERONTIA ATROPOS IN 1900. The 



unusual occurrence in this country of several species of Lepidoptera 

 during the year has furnished material for numerous communications 

 to the ' Entomologist,' but I notice that as regards the visitation of 

 C. edusa, C. hyale, and A. atropos, the bulk of these records are from 

 correspondents who reside or have collected in the southern half of 

 England. Reports on these species from northern sources have been 

 few in number, and, as I think, very inadequately represent their 

 actual distribution this year throughout the country. In a general 

 way our northern confreres seem to be less desirous of exchanging 

 ideas and experiences through the pages of entomological magazines 

 than their fellow-students in the south, but it certainly is a matter of 

 surprise to me that our north-country brethren have apparently 



9 The gynandromorphic specimen of this hybrid shown (PL III. fig. 8) 

 is on the upper side of wings and body predominatingly female, only on the 

 right hind wing outside the eye spot is a bright orange-coloured patcli, which 

 changes in colour ; and one can also be seen on the figure. The antennae are 

 almost entirely male, and the male genital claspers are well developed. 

 Beneath, male and female characters are indefinitely mixed, only the right 

 hind wing is entirely female (see footnote ''). 



