196 Mosquitoes 



tightly closed, preferably with a rubber stopper, but 

 a cork stopper without cracks will do. When I use 

 a cork stopper on a cyanide bottle I always try to 

 have it infiltrated with paraffine to stop up the cracks. 

 Adults should not be preserved in liquid, nor should 

 they be mounted on slides. They may be tempo- 

 rarily preserved in pill boxes on cotton, the pill boxes 

 being afterward placed in wooden boxes ; they may 

 safely be mailed in this condition. A study collection 

 is best mounted on triangular tags of pasteboard 

 about three-eighths of an inch long and one-eighth 

 inch or less wide at the base. An insect pin is run 

 through the base of the tag, and the tip of the tag 

 touched with white shellac. The mosquito should be 

 fastened to this tip on its right side at a point just 

 back of the wing, or, if preferred, on its breast. This 

 permits of working all around the insect and obtaining 

 a good view of all parts. Put a label on the pin below 

 the triangle, with date, locality, and name of the 

 collector, and below this another label with the name 

 of the insect. There are other methods of mounting, 

 but none so simple or so safe to handle, or permitting 

 the specimen to be worked over with the compound 

 microscope. 



In the laboratory the adults are placed in some sort 

 of breeding jar. A glass cylinder with a cover of 

 cheese-cloth held on with a rubber band is one sort. 

 Or a wire netting may be tacked in an arch, about 

 eight inches high, over a piece of board about a foot 

 long and ten inches wide. At the open ends fasten 

 cheese-cloth, one end flat across, the other left in a 

 bag about six inches long with a hole in the centre, 



