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The situations where it is found are woods. 
The perfect insect appears in April. 
The date of the appearance of the caterpillar is in 
April. 
It feeds on the birch. 
The chrysalis, which is green, is found in the lichens 
and bark of birches. 
MICROPTERYX SPARMANELLA. 
Plate CI. Figure 1. 
Localities for this species are near York. 
The perfect insect appears in February, February 20, 
April and May. 
The date of the appearance of the caterpillar is in 
July. 
It feeds on the birch. 
The chrysalis is found below the surface in a small 
cocoon. 
MICROPTERYX SUBPURPURELLA. 
Plate CI. Figure 2. 
Localities for this species are York, Lewes, Market 
Ilarborough, Scarborough, Beckenham. 
The situations where it is found are among oaks. 
The perfect insect appears in May. 
The caterpillar is whitish yellow, with a line along the 
back of greenish grey ; and on the sides of the fifth and 
sixth segments is a slight protuberance ; the head reddish 
brown. 
