OCTOBER. 253 



LEPIDOPTERA. PYRALID^E. 



HYDROCAMPA. 



Generic Distinctions. Antenna moderate, and simple in both 

 sexes ; proboscis rather long ; palpi four in number ; wings, all the 

 margins entire. 



HYDROCAMPA NYMPH^ATA. Beautiful China-mark. 

 This species measures nearly an inch ; the wings are white, 

 the anterior pair with two brown stripes from the base to 

 the middle, the remaining portion having two bands con- 

 nected in the centre ; a narrow one forms the margin ; the 

 posterior wings have also two brown transverse bands, the 

 arrangement of which bands varies considerably. The 

 caterpillar feeds on duckweed, and is not common. 



LEPIDOPTERA. YPONOMEUTID.E. 



ARGYROMIGES. 



Generic Distinctions. Antenna as long as the wings ; palpi short, 

 filiform, and drooping ; wings rolled round the body when at rest ; 

 body very slender. 



ARGYROMIGES SYLVELLA. Dark Porcelain. This insect 

 measures about three lines ; the anterior wings are white, 



