Nov. 23, 1871] 



NATURE 



67 





I. Ephemera vulgata. 2. Ephemera, larva. _ 



5. Calopterj-x virgo. 6. Agrion 

 Plants : — Flowering Rush {Butomits umbeltatus), 

 '.mfhibium). On Left. 



DRAGON-FLIES, MAY-FLIES, AND CADDIS 



3. Libellula depressa. yt- Libellula emerging from pupa- case. 4. Libellula, larv: 



minium. 7. Phyrganea grandis. 8. Phryganea, larva cases, or Caddis. 

 In Centre. Mare's-tail (HippurU vulgaris). Oa Right. Water Bistort (Potygonm 



Streaks of a similar colour, which look as if they had been 

 drawn in water-colours with the very finest of brushes, 

 and then damped so as to blur their edges. The hind 

 wings have only one streak, which runs obliquely towards 

 the anal angles, and, when the wings are spread, looks as 

 if it were a continuation of the first stripe on the upper 



wings. The shape of the moth almost exactly resembles 

 that of the Brimstone Butterfly, described on page 393. 



" The larva affords an admirable example of the twig- 

 resembling caterpillars. It is exceedingly variable in 

 colour, but is always some shade of brown. It has seven 

 bud-like humps, and a few pale stripes along the sides. I 



