12 



Annals Entomological Society of America [Vol. VI, 



The water in the breeding dishes must be aerated twice 

 daily. The Paquelin Cautery bulb method referred to on page 

 10 does well when the number of places is few. When these 

 plates are numerous, it is better to construct an aerating device 

 such as shown in figure 2, using old tins, tubing, etc. There 



Fig. 2. Aerating Device. A, water reservoir, open at top; B, air chamber; 

 C, stop-cock regulating flow of water into B; R, tee unions made of cork; T, 

 terminal capillary tubes. 



should be as many feeders as there are dishes to aerate. To set 

 the apparatus into operation, adjust feeders to plates, fill 

 chamber "A" with water and open stop-cock leading to the 

 air chamber. 



The writer noted on four occasions a large roach drinking 

 water from breeding pans, at the same time devouring larvae. 

 On seven occasions ants were seen reaching after such larv^ 

 as were near the edge of the plates and while under observation, 

 two larvae were successfully withdrawn from the water. These 

 observations suggest strongly the need of protection against 

 these inroads. Keep lookout for mice. 



