412 



Annals Entomological Society of America [Vol. IX, 



was also seen about the traps and experimental dishes frequently, 

 but for some reason few individuals were caught. Several 

 other species were captured in small numbers, but have not yet 

 been identified. 



Stomoxys calcitrans L. was not caught often in ammonia 

 traps and I was not able to get it to oviposit on cotton soaked 

 in valerianic acid, although Howlett did succeed in this at 

 Pusa, India. Howlett does not give the details of his experi- 

 ments further than to say that he used "cotton- wool soaked 

 in valerianic acid." (Howlett, 1912, p. 416). 



One trap experiment and eight oviposition experiments 

 with valerianic acid were completed during the summer of 

 1915 at New Brunswick. The traps and method of using them 

 have been described above. The oviposition experiments were 

 performed in porcelain evaporating dishes, 120 mm. in diameter. 

 A piece of sterilized absorbent cotton was placed in each, to 

 the surface of which the acid and usually water were added. 

 The experiments were carried out at various times on the window 

 sills of a laboratory or on a bench near a livery stable. Frequent 

 observations showed that Stomoxys was present in these local- 

 ities throughout the course of the experiments. The results 

 of the valerianic acid experiments are set forth in the following 

 table : 



Table B. 

 trap experiment. 

 Amount of material. Number of Dviration of Result 



traps experiment 

 50 cc. valerianic acid 1 67 hrs. No Stomoxys 



50 cc. distilled water. 



OVIPOSITION EXPERIMENTS. 



Amount of material 



Number of exper- Duration of Result 



imenta 



10 cc. valerianic acid-|-cotton 



2cc. valerianic acid-|-cotton+50cc. water 

 5 cc. valerianic acid-(-cotton-|-50 cc. water 



dishes 



experiment 

 46 hrs. 

 45 hrs. 



45 hrs. 



46 hrs. 

 23 hrs. 

 22 hrs. 

 18 hrs. 



3 hrs. 



No eggs 



Stomoxys did not lay eggs on cotton treated with valerianic 

 acid in these experiments and it was never seen attempting 

 to do so, nor was it ever observed hovering about the dishes. 



