INSECTS AFFECTING PARK AND WOODLAND TREES 



559 



Viceroy 



Basihirc/iia art liippiis Cram. 



A somewhat tuberculate, angular, ri.-ddisli brown, yellow isli marked caterpillar \-\]i 

 inch long, feeds singly on willow and poplar. 



The parent insect is a very strikins.^ and cununon hiittcrll) in ilie .Atii- 



rondacks, havinir a winir spread of about three inches. It nia\' be insiantlv 



recognized by the broad, oblique, white band extendins^^ across the mitltlle 



of botli the fore and hind wings. The caterpillar is rather curious in 



appearance and has a red or piu'plish brown head ornamented with many 



reddish brown tubercles. The thoracic segments are somewhat enlarged, 



didl dirty brownish yellow or clay brown and with darker markings. The 



middle segment bears a pair of long, spiny tubercles. The rest of the 



body is a dark brown, olive or dark reddish, tinged in ])laces with brownish 



yellow, occasionally running into black, antl on the middle of the back is 



a large saddle-shaped spot of a dirty dull cream color, tisually .slightly 



tinged with gi'een. While this species is abundant in the Adirondacks, the 



caterpillars are rarely numerous enough to cause material injury. It feeds 



by |)reference on poplars and willows and it has also been taken on other 



trees such as apple, [)hnn, cherry ami it is said to occur on oak. 



Harpyia cinerea Walk. 



A peculiar, light green,- brown-marked caterpillar with a ])air of long, sleniler, 

 annulated caudal appendages, occurs on willows and poplars. 



This insect is interesting largely because of the very peculiar cater- 

 pillar which, when at rest, ajjpears somewhat like a linear brown scar on a 

 leaf. This pecidiar form and coloration is undoul>tedIy a protective de\ice. 

 This species is so rare that it can not be considered dangerous. A male is 

 represented on plate 44, figure 7. A larva, probably of this species, is 

 illustrated on plate 16, figure 10. 



