TAULK OF CONTENTS. IX 



p.iainl}' in the Eastern States and New York, 121. Recently ob- 

 served in Michigan, 121. Its preference for early apples, 122. 

 Also attacks winter fruit, 122. Remedial measures: destroying 

 the fallen fruit, 123. Destroying the pupx, 123. Imperfect 

 knowledge of its life-history, 123. Particular points to be ob- 

 served, 124. Another apple-fly of similar habits, 124. How the 

 apple-midge, Scz'ari ina/i, may be distinguished, 125. 



INJURIOUS COLEOPTEROUS INSECTS. 



xA.MPHiCERUS BiCAUDATUs, the Applc-twig Borer 125 



Synonymj' and bibliography, 125. A western form, not often 

 found in New York, 226. Description and figure of the beetle, 

 126. Attacks apple, pear and cherry trees and grapevines, 126. 

 Burrowing habits of the beetle, 127. Little known of its early 

 stages, 127. History of the beetle as usually given, questioned, 

 128. Its hibernation doubted, 128. Statements in regard to its 

 boring twigs, 129. What the life-histor}^ will upon proper study 

 probably prove to be, 130. Other larvas presumably associated 

 with it in its food-plants, 130. The injuries from the beetle usu- 

 ally not serious, 131. Burning the tunneled twigs of doubtful 

 value, 131. Paris green may prevent attack, 131. Polycaon coii- 

 fertus displaying similar burrowing habits in California, 132. 

 Conformity of habits in the Bostrichitne, 132. 



Lema trilineata, the Three-lined Leaf-beetle 132 



Synonymy and bibliography^ 132. Its attack upon potato 

 plants, 133. The larva described and figured and its habits given, 

 133. Description and figure of the beetle, 134. Life-history of 

 the insect, 134. Successive broods during the season, 135. Discov- 

 ered feeding upon the eggs of the Colorado potato-beetle, 135. 

 Hand-picking and the arsenical insecticides recommended for 

 destroying it, 136. 



Tribolium ferrugineum 136 



Bibliography and synonymy, 136. Discovered in large numbers 

 in coarse flour, 136. Habits of the beetle as observed, 137. 

 Heat recommended for killing the insect, 137. Long known as 

 infesting grain and vegetable stores in Europe, 137. Observed 

 in a museum feeding on insect collections, 138. Its carnivorous 

 habit questioned, 138. Testimony to its feeding upon insects, 

 138. Other food eaten b}^ it. 139. Has been seldom noticed by 

 American writers, 139. A cargo of ground nuts destroyed by 

 it, 139- 



Brachytarsus variegatus 139 



Bibliography and synonymy, 139-140. The beetle found feed- 



