50 ' THE REPORT OF THE No. 19 



Lestes is another large genus of this group and was conspicuously- 

 represented at Go Home, the large and graceful L. vigilax being particu- 

 larly numerous in all marshy places. These forms are slender, graceful 

 insects, generally bronze in color and are easily recognized in the field by 

 the listless way they have of resting upon a grass stem or reed with the 

 wings half spread. Other Agrionids keep their wings folded together over 

 the back, while in the rest of the dragon-flies they are held in a horizontal 

 position. 



These Lestes are among the later dragon-flies to appear and are com- 

 mon until well on in September, when almost the only other survivors of 

 the group are the Aeschnas and the various species of Sympetruvi, those 

 hardy little red fellows which are so abundant in late summer and fall. 

 The dragon-fly season, in fact, begins to wane before the end of July, 

 though a host of forms are still abroad in August and several species do 

 not appear until the month has begun. We have, however, dealt with a 

 sufficient number to indicate the nature of this part of our summer's work 

 at the station and the character of the fauna in that region. Fifty-eight 

 species were taken and the nymphs or nymph exuviae of nearly half that 

 number, and it is to be hoped that the work will be continued year by year 

 until the life histories are known not only of the dragon-flies but of all the 

 aquatic insects of the region. 



A PEELIMINAEY LIST OF THE SCALE INSECTS OF ONTARIO. 

 By Tennyson D. Jarvis, B.S.A., Ontario Agricultural College, Guelph. 



The following list of 48 species is certainly not a complete one for our 

 province, but may serve as a basis for further work by other collectors. 

 Twenty-eight of these are found on forest trees, 8 on fruit trees, 10 on shrubs, 

 9 on greenhouse plants, 2 on weeds, 2 on staple crops, and 1 in nest of ants. 



I am deeply indebted to Prof. J. G. Sanders and Prof. C. L. Marlatt, 

 Bureau of Entomology, Washington, for identification of many of the species. 

 I owe thanks to Mr. L. Caesar for his assistance in describing many of the 

 insects. To the following, also, my gracious acknowledgment is due for 

 assistance in various ways: Dr. Bethune, 0. A. College; Dr. Fletcher, 

 Dominion Experimental Farm, Ottawa; Prof. C. C. James, Thomas Rivett 

 and Percy Hodgetts, Department of Agriculture, Toronto. Many of the 

 illustrations are after Lochhead (the San Jose Scale anS other scale insects). 



ORTHEZIINiE. 



(Arranged according to a Catalogue of Coccidse of the World, by Mrs. 



Fernald.) 



90 Orthezia Americana, (Walk) — Artemisia sp., Woodstock. 

 98 Orthezia insignis^ (Dougl.) — Palm, Greenhouse, Toronto. 



DACTYLOPIINiE. 



192 Asterolecanium variolosum, (Ratz.) — Oak, (Quercus sp.) — Niagara, 



Ottawa. 

 254 Kermes Pettiti, (Ehrh.)— White Oak (Quercus alba), Toronto. 



4a EN. 



