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year had it been observed within a distance of 50 miles. A single 

 individual was observed last summer on a garden sunflower in the 

 city. Twenty-five years ago, in northern Illinois, where now its 

 ravages in the corn field are only prevented by continual crop rota- 

 tion, this insect was as unusual as it is at present at Wooster, Ohio. 



Early in the spring of the present year the pea louse {Nectar ophor a 

 destructor) appeared in the clover fields throughout localities where 

 there had been injuries to the peas last year and later spread to the 

 fields of growing peas. In Ohio those engaged in pea culture on a 

 large scale only plant the earlier varieties, which are picked before 

 the insect migrates from the clover. 



The harlequin cabbage bug {Murgantia histrionica), which was exter- 

 minated by the severe winter a few years ago, except in the extreme 

 southern part of the State, has begun its northward spread again, and 

 has been reported as destructive at points along the Ohio River. 



Last spring a number of the egg masses of Mantis religiosa were 

 received from Professor Slingerland and placed in several portions of 

 the State, including Wooster. We have watched these continually 

 since placing them outside, and in no instance have we been able to 

 note the hatching of the eggs. Unfortunately some of the masses were 

 destroyed, apparently by mice, as they were protected by wire netting 

 that would admit nothing larger. 



As a repellant against the infestation of dwellings by ants, we have 

 used naphthaline crystals with success. 



As an indication of the somewhat gregarious nature of Limenitis 

 disippus, 27 larvae were found on a group of less than half a dozen 

 Lombardy poplars only a few inches in height. These were observed 

 in October near Cleveland. 



Chrysomphalus dictyospermi was found in considerable abundance 

 in the station greenhouses on Chamerops humilis. The close super- 

 ficial resemblance of this species to Aspidiotus perniciosus renders it 

 of special interest at the present time. 



Much has been said and written relative to the danger of spreading 

 the San Jose scale {Aspidiotus perniciosus) by the shipment and sale 

 of infested fruit. While danger is admitted by entomologists, in no 

 instance has an introduction been traced to this source. The follow- 

 ing experiments, by no means conclusive, will indicate that introduc- 

 tion by this means is beset with difficulties when we try to do it : 



October 15, 1900, fresh peelings from badly infested apples were 

 placed within 4 inches of the base of a young apple tree, set from the 

 nursery row some four years ago. On same date peelings from badly 

 infested apples were placed against and around the base of a small 

 apple tree, and on the 26th more of the infested peelings were wound 

 around the base of the same tree. July 9, 1901, as well as on previ- 

 ous dates, inspections made by different entomologists revealed no 

 scale on the trees. 



