THE ENTOMOLOGIST 



Vol. XXXIV.] MARCH, 1901. [No. 454. 



ODONATA IN 1900. 



By W. J. Lucas, B.A., F.E.S. 



Plates I. and II. 



Though perhaps somewhat earlier than in 1899, yet the 

 spring dragonflies were rather slow to assume the imaginal con- 

 dition. Specimens of what were probably Lihellula quadrimacu- 

 lata were certainly noticed as early as April 22nd — one in Epping 

 Forest (A. Harrison), and another at Merton, in Surrey (J. S. 

 Brocklesby) ; one or two Pyrrhosoma mimpkula were found on 

 Esher Common on May 5th, and at the same place, on May 13th, 

 a male of Enallagma cyathigerum, and another of CorduUa cenea, 

 both but just emerged ; a specimen of Lihellula depressa was 

 secured in the New Forest on May 16th (W. J. Cross), and 

 Ischnura elegans (S. W. Kemp) was taken at Acton the next day. 

 But still it was not till the very end of May that the earlier 

 species began to appear at all commonly, and even at the begin- 

 ning of June many of them were still in a very teneral condition 

 as regards colouring. Passing to the end of the season, Pyrrho- 

 soma tenellum, which was first seen in the New Forest at the very 

 beginning of June, was last taken on September 16th ; E. cyathi- 

 gerum (first seen May 13th) lasted a little longer, till September 

 22nd. .-Eschna mixta was about in some numbers on Esher 

 Common till October 7th at least. Sympetrum scoticicm and 

 S. striolatiim were seen on Esher Common on October 28th, and 

 the last no doubt might have been found in decreasing numbers 

 for about three weeks longer, till the middle of November, after 

 which date I have never seen it. 



No specimen of Sympetrum vulgatum seems to have been de- 

 tected during 1900, but I have to record a male which I possess 

 myself. It is labelled " Richmond Park, September 11th," and 



KNTOM. — MARCH, 1901. . F 



