1917 ENTOMOLOGICAL SOCIETY. 17 



(Datana integerrima 0. & IJ.) was more than usually abundant, being found on 

 walnut and hickory. Other common pests such as the Oyster Shell Scale, {Lepi- 

 dosaphes ulmi L.), the Imported Currant Worm, {Pteronus ribeaii Scop.), the 

 Codling Moth, {Carpocapsa pomonella L.), etc., were more or less destructive in 

 the district. 



Garden and Giieenhouse Insects. 



Cutworms wore frequently complained of as injuring plants in gardens. 

 Sweet peas were freely attacked in one garden in the first half of June. At Meach 

 Lake, Que. (near Ottawa) flowering plants were being injured at the end of June. 

 The Red-backed Cutworm was the most commonly-occurring species. 



The Taknished Plant Bug (Lijgus pralensis Linn.), was present in con- 

 spicuous numbers. Some growers of dahlias and zinnias claimed that large num- 

 bers of the buds had been destroyed by the insect. In one garden in Ottawa the 

 bugs were very numerous in the middle of July, one lady reporting that almost 

 all the zinnia plants in her garden had been destroyed. Unfortunately, there is no 

 satisfactory remedy known for the control of this insect. Some growers claim to 

 have had partial protection by dusting powdered tobacco over the buds or other 

 portions of the plants which are attacked. 



The Yellow Woolly Bear (Diacrisia virginica Fab.). Xoticeable injury 

 was caused by this caterpillar in gardens, particularly to the foliage of hydrangea. 

 In the middle of July when some leaves were examined the larvae were about half 

 an inch in length. The leaves were conspicuously skeletonized in places. 



Household Insects. 



Ants. Some interesting experiments in the control of ants in houses were 

 conducted during the past season. Near Chelsea, Que., about nine miles from 

 Ottawa, perfect results in ridding summer cottages of ants were obtained by dust- 

 ing sodium fluoride where the insects were numerous. This new remedy was also 

 used in Ottawa and other places, and reports of success in all cases were received. 

 In our own experiments the species of ants concerned were the common carpenter 

 ant (Camponotus pennsylv aniens DeG), and the shed builder ant {Cremastogaster 

 Jineolata Say). An account of these experiments was published in the November 

 1916, issue of the '' Canadian Entomologist." 



Roaches {Blattella germanica Linn.). Sodium fluoride was also used with 

 success in Ottawa in ridding a house of these objectionable insects. The powder 

 was simply dusted in the places which were frequented by the roaches and almost 

 immediately they began to disappear. Within a week no individuals were to be 

 seen, where previous to the use of the powder the insects were present in numbers. 



Carpet Beetles. The two carpet beetles, namely, the true Carpet Beetle, 

 or Buffalo Moth (Anthrenus scrophidariae L.), and the Black Carpet Beetle 

 (Atfagcmis piceus Oliv.), were reported as being present in destructive numbers 

 in houses in Ottawa. No exceptional injury however was noted. 



A few complaints were also received of the presence in houses of the Indlan 

 Meal ;\roTH (Plodia interpuncteUa Hbn.) and the Confused Flour Beetle 

 (TriboUum confvsum Duv.). The former was found attacking breakfast cereals 

 and the latter infested flour. 

 2 E.S. 



