OCTOBER. ' 253 



LePIDOPTEKA. PYRALIDiE. 



HYDROCAMPA. 



Geyieric Distinctions. — Antenncs moderate, and simple in both 

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

 the margins entire. 



Hydrocampa ntmph^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 connected 

 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^. 



AEGYEOMIGES. 



Generic Distinctions. — Antenna as long as the wings ; j*;*?/^;/ 

 short, filiform, and drooping ; wings rolled round the body when 

 at rest ; body Ytvy slender. 



Argyromiges sylvella. Dark Porcelain. This insect 

 measures about three lines; the anterior wings are white. 



