82 
We have found sprays of all kinds ineffective. Our most satis- 
factory results were obtained when we brushed the lice from the 
plants and covered them with earth, using an Iron Age cultivator for 
that purpose. We have designated this the ‘‘brush and cultivator 
method.” [For a more complete account of this pest see author’s 
paper on page 55]. 
The fruit-tree bark-beetle, Scolytus rugulosus Ratz., has been a very 
conspicuous insect in orchard trees this season, especially those injured 
by the severe freeze of February, 1899. 
The harlequin cabbage bug, J/urgantia histrionica Hahn., We not 
been reported from any locality this season. We attribute Hs scarce- 
ness to the freeze of 1899. 
The Hessian fly, Cectdomyza destructor Say, has been very destruc- 
tive to all early sown wheat. Some late sowings were also injured. 
The fall of 1899 being very open, the fly seemed to continue its depo- 
sition of eggs much later than usual. 
The imbricated snout-beetle, Apzcerus imbricatus Say, was reported 
to me as injuring the leaves of cantaloupe in Washington County 
May 23. 
The imported cabbage worm, Pieris rapw Linn., has maintained its 
rapacious habits and done much injury to cabbage over a wide area of 
the State. Paris green, 1 pound in 100 pounds of land plaster, has 
been the most useful remedy. 
The imported currant worm, Pleronus ribesii Scop., has been a very 
serious pest upon the currant and gooseberry in all parts of the State 
where these fruits are grown. Both Paris green and hellebore were 
used with EUS EOU y results. Hand picking was resorted to in many 
cases. 
The Mediterranean flour moth, “phestia kuehniella Zell., has been 
sent to me from New York, Pennsylvania, Ohio, Canada, and Aus- 
tralia the past season. We have found, by actual trial, that hydro- 
ceyanic-acid gas is the most perfect and effectual remedy yet tried for 
the flour moth and other mill pests. Large mills in Ohio, Penn- 
sylvania, Canada, Oregon, and Texas have been successfully fumigated 
in accordance with the writer’s directions. [For specific directions for 
using this gas in mills, etc., see author’s articles in the ‘‘ American 
Miller” (Chicago, Ill.), for September and November, 1899. | 
The melon plant-louse, Aphis goss ypu Gloy., has again appeared 
in Maryland and promises to do serious damage in certain sections. 
[August: Was not so serious a pest as was anticipated. It was held 
in check by lady beetles and parasites]. Hand picking of leaves when 
first noticed and spraying others with 10 to 12 per cent kerosene 
emulsion were very effective. 
The pale-striped flea-beetle, Systena blanda Mels., was again a serious © 
pest to young tomato plants during the latter part of May. No satis- 
factory remedy has been found. 
