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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 (Nectarophora 
_ 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 ona 
large scale only plant the earlier varieties, which are picked before 
the insect migrates from the clover. 
The harlequin cabbage bug (Aurgantia 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 larvee 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 conelvsive, will indicate that introdue- 
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. Onsame 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. 
