374 PTEKOPHORUS GALACTODAOTYLUS. 



they attain full growth sooner or later in different 

 localities, for the larvae from Bristol were spinning up 

 when received in the first week in May, and were all 

 pupae when the still smaller larvae arrived from 

 Norwich at quite the end of the month. 



They were feeding on the under-side of the leaves 

 of the burdock, eating through and quite riddling the 

 large leaves. 



The larvae were about three-eighths of an inch in 

 length, and of moderate bulk in proportion ; the head 

 has the lobes rounded and polished, and is consider- 

 ably narrower than the second segment ; the body is 

 rounded at the subdorsal region, slightly flattened 

 dorsally, and still more flattened ventrally ; it is 

 attenuated posteriorly, and also from the third seg- 

 ment to the head; the tubercles are large and 

 prominent, each of them emitting a tuft of moderately 

 long hairs; the skin is very slightly roughened, and 

 the segmental divisions are well defined. 



The ground colour of the head and body are uni- 

 formly pale pea-green, and the mandibles are brown; 

 two rather distinct grey lines extend through the dorsal 

 region, enclosing between them the less distinct, 

 narrow, grey, medio-dorsal line ; there is an indistinct 

 row of grey spots substituting the subdorsal line, and 

 the spiracular ridge is also greenish-grey; the hairs are 

 grey; those from the side tubercles stand out hori- 

 zontally and are slightly curved, giving a remote 

 resemblance to the larva of Acronycta leporina; the 

 ventral surface is uniformly of the pale green of the 

 dorsal area. 



When full-fed the larva spins a patch of silk on the 

 under-side of the leaf, or on the stem of the burdock, 

 or on any convenient object near, and in a few days 

 changes to a pupa. This, though laid flat, is attached 

 to the silk by the anal hooks only, there being no 

 silken belt round the body. 



Like others in the genus, the pupa is somewhat 

 similar to that of a butterfly, or of an Ephyra ; it is 



