OF WASHINGTON, VOLUME XV, 1913. 



97 



TABLE IV. Egg-parasitism of Datana integerrima for the spring brood of 1908. 



In the spring of 1908 the pecan trees were very closely examined 

 for eggs of the host of these 4 species of parasites, but very few 

 egg-masses or larval colonies of the first brood could be found, 

 even in the groves where the summer before they had been abun- 

 dant. Only 4 egg-masses were collected and they furnished the 

 data on the egg parasitism of the spring brood as shown in table 

 IV. 



Calculating the percentages from this table, 45 per cent of the 

 eggs hatched, as larvae, 39.+ per cent were parasitized, and 14 per 

 cent failed to hatch. As these were the eggs of the first brood in 

 the spring, the number of parasites emerging indicated that the 

 parasites passed the winter in some numbers. When considered 

 in connection with the percentage of parasitism of 58.+ percent 

 for the eggs of the fall brood of Datana integerrima in 1907, it ap- 

 peared that the parasites had a fine chance to hold this insect in 

 check during 1908. Unfortunately the writer was compelled to 

 leave the State at that time and the observations could not be com- 

 pleted. 



Aside from these observations, Gossard 1 wrote, under natural 

 enemies of Datana integerrima, that "the eggs are attacked by a 

 hymenopterous parasite." 



H. A. Morgan 2 recorded Telenomus gossypiicola Ashm. as "an 

 active egg-parasite in Louisana," but the writer is inclined to believe 

 that he had Telenomus sphingis, as these two species run very close 

 together in Ashmeads tables. 3 



Later Herrick, 4 writing of Datana integerrima said, "There is 

 also a small insect that is parasitic on the eggs of the moth. Profes- 

 sor Morgan says that out of one batch of twelve hundred eggs every 

 one was parasitized." 



'H. A. Gossard. Bui. 79, Fla. Agr. Exp. Sta., p. 301, 1905. 



2 H. A. Morgan. Bui. 69, 2d ser., La. Agr. Exp. Sta., p. 882, 1902. 



W. H. Ashmcad. Bui. 45, U. S. Nat. Mus.. p. 144, 1893. 



4 G. W. Herrick. Bui. S6, Miss. Agr. Exp. Sta., p. 21, 1904. 



