66 BULLETIN 351, U. S. DEPARTMENT OF AGRICULTURE. 



appeared in large numbers and attacked the developing females in 

 the spring. That which was apparently the first brood emerged 

 from the hosts about June 30. This infestation was very noticeable 

 owing to the excessive blackening of the scales, as from 20 to 50 per 

 cent of the scales were killed. Later this same species made an attack 

 upon the male larvse when in the second instar, and in some instances 

 5 per cent of the males were destroyed. At Ledy Station, Pa., 

 and at Midvale, Pa., this species made a heavy attack in the fall, 

 but at Mont Alto, Pa., it was scarce, owing to the almost complete 

 destruction of the host by Hyperaspis oinotata. 



Aphycus stomachosus Gir. was the most abundant parasite in 1913, 

 being more numerous than C. cognatus. It was reared in greatest 

 numbers from the nearly mature females in the early part of June, 

 but it was also taken in large numbers in the orchards during the 

 first half of September. Aphycus jolinsonii Howard was reared 

 in small numbers from both Eulecanum nigrofasciatum Pergande 

 and E. corni Bouche at Mont Alto, Pa., but the last-named species 

 seemed to prefer L. corni as a host. 



Besides the foregoing parasites, Blastothrix sericae Dalman was 

 reared from E. nigrofasciatum in 1912, as well as numerous specimens 

 of a new genus of Encyrtidae. 



A number of specimens of Prospalta sp. were taken from the 

 parasite cages during the season of 1912, but these may have come 

 from armored scales that were introduced by accident. 



The records of this bureau contain references to the following 

 specie's as parasites of Eulecanium nigrofasciatum: 



Anagyrus nubilipennis Gir. 



Eunotus lividus Ashm. 



Pachyneuron altiscuta How. (secondary). 



Prospalta aurantii How. 



Chiloneurus albicomis How. 



Blastothrix sericea Dalm. 



Corny s fusca How. 



Coccophagus ater How. 



cognatus How. 

 lecanii Fitch. 

 cinguliventris Gir. 

 longifasciatus How. 

 flavoscutellum Ashm. 

 fraternus How. 

 Aphycus annulipes Ashm. 

 johnsoni How . 

 stomachosus Gir. 



SOOTY MOLDS. 



Eulecanium nigrofasciatum does most of its damage to the peach 

 through its mold-infested honeydew, which is deposited in varying 

 amounts throughout the entire season. While this honeydew is 

 objectionable, it would cause very little damage were it not for the 

 sooty molds which grow abundantly on the leaves, twigs, and fruit 

 and on the soil beneath the trees when these are coated with the honey- 

 dew. This honeydew becomes noticeable only at three times during 

 the year. A slight deposit from the maturing females appears in 



