74 



THE REPORT OF THE 



No. 19 



A simple apparatus, based upon tlie principle that most insects seek 

 light, provides an efficient and safe method of obtaiaing parasites from 

 parasitized material, rearing gall insects, etc. Figures 29 and 30. 



Fig. 29. Apparatus for procuring 

 ParasitcB. (Side view.) 



Fig. 30. Apparatus tor procur- 

 ing Parasites. (View from 

 above. ) 



It consists of a simple cardboard box about 20 x 12 x 12 cm., upon 

 one end of which is fixed by tacks driven through the cardboard from 

 inside, an oblong block of wood about 9x7x1 cm. with a hole about 

 2.5 cm. in diameter bored through the centre of it. The cardboard behind 

 this hole is removed neatly leaving a circular hole opening into one end of 

 the box. Into this hole the paper cone, open at both ends, is thrust. A 

 glass tube is thrust into the paper cone. This provides an arrangement 

 which is quite tight and yet easy to handle. The material from which it 

 is desired to obtain insects or parasites is placed in the box. When the 

 insects emerge into the tvibe it is removed quickly and corked and another 

 tube is put in its place. In case work is being done with very small insects 

 a sheet of cotton cloth covered with a thin layer of cotton batting may be 

 placed over the top of the box and the lid forced down over it, thus pre- 

 venting the escape of any under the lid. When all the insects which are 

 living have emerged, the material remaining in the boxes may be examined 

 for dead insects. 



COLEOPTERA. 



Family-Buprestidce. Metallic Wood Borers. 



A few produce galls, the most important one being the Red-necked 

 Agrilus, producing galls on the Raspberry and Blackberry. 



Family-Ceramhycidcp. The Long-horned Beetles. 



These beetles are of medium or large size. The body is oblong or 

 cylindrical and the antennse are long, often longer than the body. Only one 

 species of gall maker is known to occur in Ontario ; the Willow Branch Borer 

 (Saperda concolor). 



