228 THE ENTOMOLOGIST. 



Belgium included is so insignificant that I have not thought it 

 worth while to change the title of the paper. No doubt all the 

 species that I have taken in Belgium only are to be had in the 

 neighbouring parts of Nord. 



Papilio machaon appeared in very small numbers in Pas-de- 

 Calais and Nord. 



The appearance of the early Pierids was rather curious. I 

 was able to watch for them daily at the sheltered end of a large 

 wood in the Arras area at the end of April, having seen no 

 specimen earlier. Although the weather was quite suitable 

 throughout the last week of April, and I was in a position to 

 make a short visit to the locality daily, I saw no butterflies but 

 hibernated Vanessids till May 2nd. On that date I found 

 numerous worn males of all three common whites. Fresh 

 examples of P. napi appeared a few days later, but the other two 

 species disappeared after May 3rd and were not seen again up to 

 May 9th, when my leave put a stop to the observation. 



A fortnight later all four species were abundant in Arras, 

 P. napi being well on the down grade. A second brood of P. napi 

 appeared in Nord and Belgium in the third week of June, and 

 was followed by P. rapa and P. bmssica before the end of the 

 month. I took a 7iapi female of the second flight with an extra 

 black spot on the fore wing, confluent with the apical patch, and 

 the veining of the under side of hind wings reduced to the 

 slightest dusting of grey scales on the basal ends of the nervures. 



I have a distinct impression that several species got through 

 their larval states in abnormally short periods during this hot 

 early summer. Although climatic conditions must have made 

 oviposition later than usual, summer flights of A. urticcB, 

 P. cardui, and G. libatrix all appeared in very good time. 



Euchloe cardamincs appeared in very great numbers at Arras 

 Citadel, but the proportion of females was even smaller than 

 usual. Aberration took the form of excessive size in both sexes, 

 and of bright yellow ground colour on the under side of the male 

 fore wings. 



Of Culias hyale I met with one specimen only, in Belgium. 



Brenthis eupJirosyne and Melitcea aarinia both occur at Arras; 

 Eugoiiia jiolycJiloros I saw at Croisette, near St. Pol. At this 

 place I was billeted in a house the owner of which had pinned 

 local lepidoptera all over the kitchen wall. Of several hundred 

 specimens there was no species that does not occur in Britain, 

 and onlj'' one, E. antiopa, that I have not myself seen in the 

 Pas de Calais. 



There was an extensive immigration of Pyrameis cardui, 

 wasted specimens being abundant in all districts in May. A 

 very numerous second brood had appeared when I left France 

 in July. 



Pararge egeria var. egerides occurs near Fruges, but was very 



