EXPERIMENT STATION BULLETINS. 565 



SOME INSECTS OF THE YEAE 1897. 



W. B. BARROWS AND R. H. PETTIT. 



Bulletin 160. — Zoological Department. 



INTRODUCTORY. 



During the year 1897 the Zoological Department of the Experiment 

 Station has received and answered many hundreds of inquiries relating 

 to insects, some of which, although fairly common always and abundant 

 occasionally, do not appear to be well known to the farmers and fruit- 

 growers of the State. It has seemed best, therefore, to publish a few 

 notes relating to certain of these insects, with the hope that such a bulle- 

 tin many not only prove helpful at once to many residents of the State, 

 but that its general distribution may lead to an increased correspondence 

 and better acquaintance with the active agriculturists of the State, arid 

 to a better knowledge on our own part of the insect enemies of our 

 crops. 



Notes are given here of twenty-eight species of insects, but it must not 

 be supposed that these are the only ones which have caused damage, 

 or even the ones which have caused the most damage during the past 

 year. More or less loss is occasioned every year by the Hessian-fly, the 

 chinch-bug, the plum-curculio, the codlin-moth, the tent-caterpillar, 

 the squash-bug, cut-worms, wire-worms, and a host of other common 

 insects, no one of which is treated in this bulletin. It is impracticable to 

 publish in a single bulletin a treatise which shall cover all our insect 

 enemies, and the selection made here is believed to be the most service- 

 able, all things considered, that could be arranged at this time. 



In this connection, a few words of advice to correspondents may not 

 be amiss. Whenever information is wanted in regard to any insect, 

 insect work, or insecticide, the proper person at the College to address 

 is not anyone whom you may know personally, or by name or reputa- 

 tion, but simply "the Entomologist of the Experiment Station," Agri- 

 cultural College, Mich. Inquiries nddressed in this way are sure to reach 

 this department directly and to receive attention at the earliest possible 

 moment. If addressed otherwise, delay may occur for various reasons, 

 and in some cases the loss of a single day might endanger an entire crop. 



It is well to remember that the most careful description of an insect 

 is seldom as good as the insect itself, while in most cases a mere fragment 



