INSECTS. 329 



uses systematically for their destruction. He catches a 

 beetle, and puts it upon a tree containing a nest of the 

 Tent-caterpillar, after which he finds the worms soon dis- 

 appear. 



Gastrophaca Americana, (Harris}. The Lappet-cater- 

 pillars are found on apple trees. The worms are flat, and 

 when at rest on a limb, they often escape observation 

 from their gray color resembling the bark. A fringe of 

 hairs, along their sides, gives them this flat appearance. 

 They feed only at night. Dr. Harris found some in Sep- 

 tember that measured two and one-half inches in length, 

 and above half an inch in breadth. 



SATURNIANS, CERATOCAMPIANS, ZEITZEEIANS. 



Platysamia (Attacus) cecropia 9 (Linn.), the Cecropia 

 Emperor Moth, is found as a large cylindrical, pale green 

 worm, three or four inches long, and as thick as one'? 

 thumb, and having two rows of pale blue, projecting 

 points along each side, and two rows of pale yellow ones 

 upon the back, with four larger, bright orange, or red ones 

 anteriorly, all ending in little black prickles. The moth 

 is large ; its wings dark gray ; each has a large white, 

 crescent like spot in the centre, margined with red, and a 

 red band crossing both wings. Appears in June ; width 

 five to seven inches. 



There are others of this family of noble moths whose 

 names have been indicated above, but they are not very 

 destructive to the orchard. 



