30 



species of butterfly is peculiar to rich meadow lands, and not common. It 

 is on the wing the latter end of August and the beginning of September. 

 I have met with it in many different places, but never have seen more than 

 two or three flying at a time. It is quick in flight, and not easily taken, 

 except about eight or nine o'clock in the morning, when feeding on the 

 flowers then in bloom/' A retrospect of the occurrence of Colias edusa, in 

 Britain, since the days of Lewin, may not be without interest. 



In 1797, it occurred in great plenty at Wrentham in Suffolk. 



In 1804, it was abundant at Clapham and other places near London, and 

 also in Dorsetshire, and the Isle of Wight. 



It was also common in 1808, the year in which my father began his " En- 

 tomological Diary." 



In 1809, Edusa was very scarce, but one of the white variety was seen at 

 Thetford, and plenty of Hyale at Horning, Norfolk, by Mr. Mack. 



In 1810, I can find none recorded. 



In 1811, it was very common, and several were taken in June. 



In 1812, I can find none recorded, and very few for 1813 and 1814, and 

 none in 1815, 1816, or 1817. The winter of 1813-14 was so severe that 

 an ox was roasted on the Thames. 



In 1818, a splendid year for butterflies and one with an unusually hot 

 summer, it occurred abundantly, and a few were taken in the month of July. 



None were recorded in 1819, a good year for Antiopa, 1820 and 1821, a 

 good year for Hyale. 



It was common again in 1822, but none were recorded in 1823 and 1824, 

 and but one in 1825. 



It was common in 1826, the " Annus mirabilis" of English Entomologists, 

 and so were also Hyale, Cardui, Atalanta, and Phl&as. 



None were recorded in 1827, 1828 and 1829; 1829 a year which had a 

 remarkably wet sunless summer, followed by one of the most severe winters 

 of the present century, there being, even at Florence in Italy, forty-eight days 

 of frost; nor in 1830. 



It was plentiful in 1831, there being a considerable flight in the neigh- 

 bourhood of Dover, during the months of August and September. 



Scarce in 1832, a year which had a cold backward spring, succeeding a 

 mild and open winter; 1833, though common in Jersey, and 1834. 



It was common in 1835 (appearing in profusion at Killarney), as was also 

 Hyale, and it was also common in 1836. 



It was scarce in 1837 and 1838, but common in ]839, many being taken 

 in June. 



It was scarce in 1840, 1841 and 1842 ; 1842 a year which had a remarkably 



