712 



APPENDIX. 



with much tenacity. When very numerous every stalk is killed. 

 Some fields two or three years ago were wholly destroyed by this in- 

 sect. Among plant house insects may be noticed the white scale bark 



louse (Aspidiotiis hnnneJiir 

 Bonche, fig. li, magnified; 4, 



young magnified; 



end 



Larva of Lciopu? xanthoxyli. 



of body still more enlarged). 

 It is often destroyed by a 

 minute chalchid fly, Cocco- 

 phagus(?). Boisduval's fern 

 bark louse (Lecanium filicum 

 Boisd., fig. 7ft, scale enlarged 

 seen from above; 71>, the 

 same, seen from beneath, 

 and showing the form of the 

 body surrounded by the 

 broad, flat edge of the scale ; 

 7c, an antenna, enlarged ; 

 7(7. a Icii. enlarged; 7<\ end of the bod}', showing the flattened hairs 

 fringing the edge), is common on hot-house plants, as also the Platy- 

 cerinm bark louse (Lecanhu/i plidijci-rii Pack., fig. 5, magnified; '/, 

 an antenna, enlarged), and the plant house Coccus ((.''. adonMum 

 Linn., fig. 3, magnified). The plant house Alenrodes {A. vajioniri/tm of 

 Westwood, fig. 9, enlarged; 9, pupa enlarged), is more common per- 

 haps than one would suppose. It lives out of doors on tomato leaves 

 and we found it not uncommon, in September, on strawberry plants on 

 the grounds of the State Agricultural College, at Amherst. The list of 

 hot-house insects is completed by one of the most injurious of all, the 

 minute Thrips ( Hdiotlirips hmiiiThi<i<t]ix Ilaliday), from Europe, fig. 

 2, greatly magnified, which by 



i.-;.,. n:-. 



its punctures, causes the sur- 

 face of the leaf affected to turn 

 red or white, while at times 

 the entire leaf withers. 



Fig. 10 represents the Cran- 

 berry weevil, Anthonomus sn- T 

 tTtralis Lecoute ; lOo, its larva, 

 mentioned on p. 487. Fig. 12 I 

 represents the Byturus imi- 

 i-olor Say (enlarged) which 

 ['mis on the flowers of the 

 raspberry. 



Explanation uf Plate 15. 

 Fig. 1, Leiopus facetus Sa} 7 , the 



larva of which bores in the branches of the apple tree. Fig. 2, 

 xanthoxyli Shinier, which bores under the bark of the prickly ash. 



