712 



APPENDIX. 



Fig. 664. 



Larva of Leiopus xanthoxyll. 



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 {Aspidiotns bromelio' 

 Bouche, fig. G, magnified; 4, 

 young magnified ; ia, end 

 of body still more enlarged). 

 It is often destroyed by a 

 minute chalchid fly, Cocco- 

 phagus(?). Boisduval's fern 

 bark louse {Le.canmm Jilir.um 

 Boisd., fig. 7a, scale enlarged 

 seen from above ; 7ft, 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; 

 7d, a leg, fukirged ; 7e, end of the body, showing the flattened hairs 

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

 cerium bark louse {Lecanium plaUjcerii Pack., fig. 5, magnified; 5«, 

 an antenna, enlarged), and the plant house Coccus (C. adonidum 

 Linn., fig. ?>, magnified). The plant house Aleurodes (.4. vaporarium of 

 Westwood, fig. 0, enhirged; 9 ?, pupa enlarged), is more common per- 

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

 aiid 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 injui'ious of all, the 

 mi mte Thrips (Heliothrips hmmorrhoidalis Haliday), from Europe, fig. 



a. greatly magnified, which by 



' Fi" fVT) 



■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, Anthonomtis sn- 

 tnralis Lecontc ; 10a, its larva, 

 mentioned on p. 487. Fig. 12 

 represents the Byturus nni- 

 color Say (enlarged) which 

 feeds on the flowers of the 

 raspberry. 



Explanation of Plate 15. — 

 Fig. 1 , Leiopus facetus Say, the 



larva of which uores in the branches of tlie apple tree. 

 xanthoryli Shinier 



Ijiirva of Callidiuni amoenum. 



Fig. 2, Leiopus 

 ^vhich bores under the bark of the prickly ash. 



