2s 
the present time (March 15, 1924), eighteen months after the spraying, repeated 
examinations have failed to disclose a single living scale, Unsprayed trees 
in the vininity used as checks are heavily infested with living scales. 
Buprestid larvae (flathead borers) are described as legless. Members 
of the staff of the Palo Alto Laboratory, however, have at various times 
collected three specimens belonging to three different species of the genus 
Buprestis which have well developed legs. 
W. D. Edmonston reports that the pine cone beetle (Conophthorus ponderosae 
Hopkins) is causing severe and widespread destruction to the seed crop on 
the vast pine areas in northern Nev Mexico and Arizona. It is estimated that 
90 per cent of the crop is a total loss and on burns and cut-over lands the 
entire crop has been destroyed. The Forest Service is much concerned about 
this comparatively new insect depredation as they find that little if any 
reproduction of pine seedlings can be expected should this invasion continue 
to persist. It has been increasing in severity during the past five years with 
the result that the prospective pine cone crop due this season will not 
materialize. The Bureau of Entomology, Branch of Forest Insects, has been 
familiar with the life history and habits of this insect for over ten years, 
and it is hoped that with the establishment of the Forest Insect Field Station 
at Albuquerque, NW. M., an intensive study of this problem can be undertaken and 
practical remedies for the control of this insect worked out. 
Reports of the presence of the boxvood leaf miner (Monarthropalpus buxi 
Lab.) are beginning to reach this office, and William Middleton would like to 
‘receive specimens or a note recording it from all localities where it occurs; 
also, if convenient, the date of adult emergence. 
Je KH. Patterson and P. D. Sergent have recently been engaged in making 
an analysis of the ratio of Dendroctonus brevicomis entrance holes and exit 
holes in bark taken from beetle-killed yellow pine trees in southern Oregon, 
The bark examined was taken from trees killed in every year since 1916, The 
annual infestations on the areas worked are known for this period. It is 
hoped and exected that the compilation (now in hand) of these data will show 
&@ rather constant interrelation between attack and emergence, and the amount 
of the subsequent infestation. The analysis of these statistics for any 
annual infestation may make it vossible to predict the amount of the succeeding 
year's infestation. 
TRUCK-CROP INSECT INVESTIGATIONS 
J. HE. Graf, Entomologist Acting in Charge 
Re E. Campbell, entomologist in charge of the Alhambra, Calif., labora- 
tory, recently made an extensive trip through the Pacific Northwest for the 
purpose of surveying  wireworm conditions in that area. He reports that 
during the past two years a wiremorm closely related to the sugar~beet wire= 
