5 66 



NEW YORK STATE MUSEUM 



Fig. 142 Chrysomela b i g s b y a 11 a, 

 enlarged (original) 



Chrysomela bigsbyana Kirby 



A yellowish, black-marked, hemispheric beetle about % inch long feeds the latter 

 part of the summer on willows and hard pine. 



This leaf feeding beetle was taken on hard pine at Karner, September 

 1901, nine specimens being collected on the 6th, and two on the 17th. 



This species is recorded by Walsh as feed- 

 ing in the larval stage on willow. He states that 

 the young resemble the grub of potato beetle. It 

 has been described by Mr Coquillett as follows : 



Body white, tinged with yellow ; spiracles 

 black with a white dot in the center of each ; on 

 each side of the segments 2 and 3 is a curved 

 black dash, the curve downwards ; cervical shield 

 concolorous, marked with a blackish spot in the 

 middle of each outer edge ; head yellowish brown, 

 ocelli black, in two clusters; length 10 mm. 



Dr J. B. Smith states that this species occurs 

 with C. m ultipunctata Say, on maple, willow, and alder, but that it 

 is more rare. This form is regarded by some as a variety of C. m u 1- 

 ti punctata and is often confounded with it, so that many references to 

 Say's species, in reality apply to this form. 



Dull red willow leaf beetle 



G ale r ticella ^ decora Say 

 This is one of our most abundant leaf beetles and 

 has been considered by Riley to be the most numer- 

 ous and dangerous among our willow insects. It 

 closely resembles the related, exceedingly destruc- 

 tive elm leaf beetle, Galerucella luteola Mull. 

 Its eggs, according to Mr Chittenden, are a little 

 larger, more brightly colored and less acuminate, and 

 the young larvae are darker in color though very simi- 

 lar. He has observed this species on swamp willows 

 in central New York in great numbers, both larvae and adults 



Fig. 143 Dull red willow leaf 

 beetle, Galerucella de- 

 cora, five times natural size. 

 (After Chittenden, U. S. Dep't 

 Agric. Bur. For. Bui. 46. 1904) 



