94 



she laid 54 eggs and was found exhausted and dying on the surface of the 

 water. 



More often the female Stegomyia lays groups of eggs at intervals 

 of several days, and sometimes lives after the last laying. 



Observations.— (Mosquito XLIII-38. Francis, Re. No. 1.) This female Steg- 

 omyia was taken from the breeding jar October 3; fed on normal blood on 

 October 4, 6, 7, 8', and 10 ; then placed in a jar to tempt ovipositing and given 

 banana ; laid eggs on October 10 and 11 ; given another blood feed October 16 ; 

 found apparently dying on the surface of the water on October 18. 



(Mosquito XLIII-68. Francis, Re. No. 3.) This female Stegomyia was taken 

 from the breeding jar on October 3 and fed on normal blood October 4, 6, 7, S, 

 and 10. It was then placed in a jar to tempt ovipositing and given banana. On 

 October 11 she laid a considerable number of eggs. On October 19 again given 

 blood feed and three males placed in the jar. October 25 she laid 29 eggs. On 

 October 26 laid 12 more eggs. On the 30th the insect was removed in a dying 

 condition. 



(Mosquito XLIII-67. Francis, Re. No. 5.) This female Stegomyia was taken 

 from the breeding jar October 3. Fed on normal blood October 4, 6, 7, 8, and 

 10. Then placed in a separate jar with water to tempt ovipositing and given 

 banana. On October 13 she laid some eggs. On the 19th given a blood feed 

 and three males added. She 'laid 11 more eggs on October 23, 16 on the 25th, 

 and 37 on the 28th, when she was found dying on the surface of the water. 



(Mosquito XLIII-69. Francis, Re.) This female Stegomyia was taken from 

 the breeding jar when less than forty-eight hours old and fed upon normal 

 blood October 4, 6, 7, 8, and 10, and subsequently at intervals of one or two 

 days up to October 23, when she was placed in a cage by herself with a 

 beaker of water to tempt ovipositing. At the same time given banana to feed 

 upon. October 25 two males were added to the cage. October 25 she laid 

 51 eggs ; November 7, 24 eggs ; November 8, laid 26 eggs ; total, 101 eggs. 



She was given another .feed of blood November 10. 



Was killed November 13 while apparently vigorous. 



Female Stegomyia fasciata that have fed on the blood of yellow- 

 fever patients on the second, fourth, and sixth days of the disease may 

 subsequently lay eggs that hatch in a normal manner, and the larva; 

 develop into pupse and imagoes. 



Observations. — (Mosquito XLVII-36. Marcial Lujan, Rx. a.) This insect 

 was separated from the breeding jar October 8 and fed on Marcial Lujan, a 

 typical case of yellow fever on the sixth day of his illness. She was subse- 

 quently fed on normal blood October 11, 13, 16, 17, and 19. On October 22 a 

 beaker of water was placed in the cage in order to tempt ovipositing, and banana 

 feeding begun. She laid 15 eggs on October 25 and 15 more on October 26. 

 Both sets hatched. 



(Mosquito XLVII-37. Marcial Lujan, Rx. b. ) This female Stegomyia taken 

 from the breeding jar October 8. Fed on blood of Marcial Lujan on the sixth 

 day of his illness, October 9, and subsequently on normal blood October 11, 13, 

 16, 17, and 19. On October 22 given a beaker of water to tempt ovipositing 

 and banana feeding begun. She laid 31 eggs on October 26, 9 on the 27th, and 

 12 on the 30th. The eggs laid on the 26th and 27th hatched on the 29th. 



(Mosquito XLII-122. Marcos Cruz, Rn. n.) This insect was separated from 

 the breeding jar Octo'ier 14 and allowed to feed on Marcos Cruz, one of our 

 experimental cases of yellow fever October 15, that is, on the second day of bis 



