52 



A third shipment of the Chinese lady beetles {Chilocorns similis 

 Rossi) was obtained last June through the kindness of Prof. Wilmon 

 Newell, State entomologist of Georgia, and established in a badly 

 infested orchard at Kinderhook, Columbia County. Unfortunately 

 we Avere unable to find larva' or signs of breeding, as had been the 

 case with earlier shipments in the years 1902-3, and it is possible that 

 most of the insects availed themselves of their freedom and spread to 

 other trees. It is sincerely hoped that some have found conditions 

 to their liking, where they have bred freely, and that the species will 

 becom.e established in that section and prove of considerable service 

 in controlling the San Jose scale. 



It will be well, in this connection, to allude to some recent work 

 done in continuation of the investigations begun in 11)02 upon the 

 grapevine root worm {Fidia vitlcida Walsh). This insect was not 

 nearly so abundant in the Chautauqua grape region during the season 

 of 1904 as it was the preceding year, and it was somewhat difficult 

 to obtain suitable conditions for experimental work. A badly 

 infested area was most thoroughly sprayed June 30, and a second 

 time, July 0, witli arsenate of lead at the rate of 4 ])oimds to 50 

 gallons of water. The treated section was the subject of close observa- 

 tion, and repeated collections with a hand catcher were made for the 

 ]^urpose of determining the number of beetles present u})()n the vines. 

 Collections July 11 resuhed in taking from 5 to 39 from single vines, 

 on the 14th from 15 to 4r), and on the 20th from 5 to 19. Similar 

 collections on an adjacent untreated area gave on the ILtli from 

 18 to 77, on the 14th from 34 to GO, and on the 20th fror.i 9 to 14 

 beetles per vine. It will be seen that there Avere more beetles upon 

 the unsprayed than wy^ovl the poisoned vines, but there was Jiot a very 

 marked diffei'ence, and nearly the same proportions held later in the 

 case of egg clusters and also for grubs. We are inclined to believe 

 that the spraying reduced the numbers of the pest about 50 per cent. 

 Supplementary indoor experiments showed that many of the beetles 

 taken from the sprayed vines and fed foliage from the same appeared 

 to die as much from starvation as from poisoning. The resistance of 

 this creature to arsenical poisons is somewhat remarkable. There is 

 no doubt that spraying is of some service in keeping the pest in check, 

 though it is not so effective as one could wish. 



SOME ECONOMIC INSECTS FOR THE YEAR 1904 IN OHIO. 



By A. F. Burgess, Colioiihus. Ohio. 



The colony of Asiatic ladvbirds (ChilocorKS simUis Eossi), which 

 was started in an orchard infested with San Jose scale in southern 



