THE GOOSEBERRY SAWFLY. 55 



conditions ; thus of some specimens kept indoors 25 developed 

 in five days, 40 in seven days, 70 in nine days, and the remainder, 

 about 150, in ten days. On hatching out, the larvae are small, 

 almost white, speckled with black anteriorly ; head black, and 

 the first and last two segments a faint orange yellow. There are 

 four moults, and after the first one the caterpillars are greener in 

 colour, a dull, dirty green, and the black spots are more numerous. 

 When full-fed the larvae are about 18 millim. long, and consist 

 of a head and twelve segments. There are three pairs of jointed 

 thoracic legs and seven pairs of false legs or pseudopods. 



Soon after hatching, the larvae commence to bite small round 

 holes through the leaves, and as they grow older they grow 

 more and more ravenous, so that by the time they are full-fed 



FIG. XXIX. LEAF OF GOOSEBERRY SHOWING THE EGGS OF THE GOOSEBERRY 

 SAWFLY, LAID ALONG THE LEAF VEINS. 



towards the end of May or early in June it is not at all uncom- 

 mon to find the trees entirely stripped of their leaves. I have 

 even seen the bark hanging in long strips. 



The larvae, when full-fed, usually fall to the ground and 

 make their way into the earth about an inch and a half below the 

 surface, and there spin dark brownish-coloured, oval cocoons. 

 Others may be found in the pupal condition in cocoons attached 

 to leaves and broken twigs which have fallen to the ground, and 

 occasionally the cocoons are found upon the bushes themselves. 

 From these cocoons the flies appear in from fourteen to twenty- 

 one days (i). 



Usually there are three broods, the first appearing during 



i. Larvae, which in confinement, pupated on June zsrd, developed into flies on July 5th. 



