76 PLANT QUARANTINE AND CONTROL ADMINISTRATION [April-June, 
Abies cilicica Cilician fir. 
Abies concolor White fir. 
Abies homolepis.. Nikko fir. 
Abies nordmanniana Nordmann fir. 
Juniperus chinensis Chinese juniper. 
Juniperus communis Common juniper. 
Juniperus excelsa Greek juniper. 
Juniperus horizontalis Creeping juniper. 
Juniperus japonica Japanese juniper. 
Juniperus sabina Savin. 
Juniperus sguamata... Juniper. 
Juniperus virginiana Ked cedar. 
Picea canadensis White spruce. 
Picea excelsa Norway spruce. 
Picea pungens Colorado spruce. 
Picea rubra Red spruce. 
Pinus contorta Shore pine. 
Pinus densifiora Japanese red pine. 
Pinus montana. Swiss mountain pine. 
Pinus nigra Austrian pine. 
Pinus pungens Table mountain pine. 
Pinus resinosa. Red pine. 
Pinus strobus White pine. 
Pinus sylvestris Scotch pine. 
Retinospora filifera Thread retinospora. 
Retinospora obiusa Hinoki cypress. 
Retinospora pisifera Sawara retinospora. 
Retinospora plumosa Plume retinospora. 
Taxus baccata English yew. 
Taxus canadensis Canada yew. 
Taxus cuspidata Japanese yew. 
Thuja occidentalis American arborvitae. 
Thuja orientalis Oriental arborvitae. 
Thuja plicata Giant arborvitae. 
Tsuga canadensis Canada hemlock. 
JAPANESE-BEETLE TRAPS SET IN AREAS OF LIGHT INFESTATION 
[Press notice] 
June 19, 1929. 
The appearance of small green buckets on iron supports and on trees through- 
out the District of Columbia and in Arlington County, Va. ( during recent 
weeks has aroused much interest. These buckets, placed by the United States 
Department of Agriculture, are Japanese-beetle traps designed, when properly 
baited, to attract and catch the beetles as they emerge from the ground in 
June and July after their transformation from the white-grub stage. 
The first capture in these traps occurred June 11, which, according to the 
Plant Quarantine and Control Administration of the department, is an early 
record for the occurrence of the beetle. On June 17, 55 beetles were taken in 
the traps in the Arlington County infested district. 
The infestation in Washington and vicinity, as indicated by the, records made 
during the last two summers, is bel ; eved to be of recent beginning and was last 
year confined substantially to three districts, namely, a scattering infestation 
extending from the north end of Potomac Park through the Capitol Grounds to 
a point directly east of the Washington Railway Terminal. The second more 
heavily infested d' strict was in the extreme northwest in the area near the 
junction of Wisconsin Avenue and Elliott Street. The third important infested 
district was southwest of the Potomac Yards Terminal between St. Elmo and 
Rosemont in Arlington County, Va. 
In addition to these districts a few other isolated points of infestation were 
noted last year. Two beetles were found in the White House grounds, 1 beetle 
near the intersection of New Jersey and Massachusetts Avenues, and 1 beetle 
a few blocks south of Brightwood. With the exception of the findings in the 
Potomac Yards in Arlington County and along Wisconsin Avenue, the numbers 
of beetles found at any point were from one to a half dozen — in a few instances 
exceeding that, and at one point east of the Washington Terminal, 15 beetles 
were taken. About 100 beetles altogether were found last year in the city of 
Washington and as many more in Arlington County, Va. 
The purpose of the traps is to attract and capture as many of the beetles 
as possible following their emergence, with the object of reducing the spread 
of the pest or possibly, although that is scarcely to be hoped, to effect its 
eradication in the Washington section. Such trapping in a new and isolated 
area of infestation, as in the case of Washington, should be of special value 
in that there are no beetles in surrounding territory to replace those caught 
