18 THE DESTRUCTIVE SPHINX. 



a, tinge of purple ; the antennae destitute of eilioe ; 

 tlie palpi are black beneath ; the thorax is imma- 

 culate ; the superior wings are steel-blue, without 

 any hyaline spot : the inferior wings are hyaline, 

 witli an opaque margin, and longitudinal line of the 

 latter colour ; the tergum, with the fifth segment, 

 bright reddish fulvous. 



The Pupa has two semifascise of spines upon 

 each of the segments, excepting the three teiminal 

 ones, which have a single row only. 



The Follicle is brown, oblong-oval, composed 

 of small pieces of bark and earth, closely connected 

 together by the web of the animal. 



This insect has been for years the cause of great 

 solicitude and regret to all the lovers of fine fruit in 

 America. Small as this creature is, measuring only 

 half an inch in length, it is the silent, insidious de- 

 stroyer of the peach-tree. 



The sexes are so remarkably different from each 

 other, that it was with much diffidence Mr Say 

 yielded his assent to their specific unity, and that 

 was from a knowledge of the circumstance that the 

 sexes of many of the species are very unlike each 

 other. In this instance, the difference is so great as 

 to render it difficult to construct a good common 

 specifiic character. 



It was to Mr James Worth, a zealous and care- 

 ful observer, that Mr Say was indebted for tlie 

 principal part of the accurate information which he 



