EXPEEIMEN^T STATIOIS^ EEPOET. 607 



l^lue insect, with transparent wings, measuring one-sixteentli of an 

 inch in length. Larvae and pupa3 were found in April, in small, stout 

 cocoons, grouped together under the old cottony masses, and the adults 

 emerged late in March and early April. 



The other two parasites did nearly as effective work in destroying 

 the scale as did the beetle. The one, Coccophagus lecanii Fitch, is 

 about half the size of the Eunotus, black, with the scutellum or spot 

 Ijetween the wings of a bright yellow, and with portions of the legs 

 light in color. This is parasitic on the hibernating scale ; but not until 

 the latter part of April were any such parasitized scales observed. 

 They were readily distinguishable from the live scales by their dark 

 color, more elongate and convex form and smaller size. They were 

 observed among all the lots of insects examined in the trees or in the 

 laboratory, but it was not until near the ijiiddle of May that adults 

 were observed. During the rest of that month and during June they 

 occurred more or less abundantly, but toward the end of June dis- 

 appeared. The efficiency of this insect was apparent in several places, 

 where two or three times as many parasitized as live scales were found. 



The other parasite, Coccophagus flavo scutellum Ashm., resembles 

 the preceding very closely, and as a matter of fact would be taken for 

 it except for its smaller size. It was found only in the young sets and 

 scales of the summer months. Among scales examined July 24th some 

 parasitized forms were found exactly resembling those of the hiber- 

 nating insects, but smaller, and in them the parasitic larvae and pupie 

 were noted. They became more abundant as the season advanced, some 

 leaves showing 200 or 300, and from all appearances there were sev- 

 eral broods. This species, as well as the preceding, was observed in all 

 the infested districts, but much more common in some than in others, 

 and the number of scale insects to go into hibernation has been much 

 reduced. 



Another species sometimes observed destroying the Pulvinaria is 

 Lcetilia coccidivora Comst., a Lepidopterous insect, the larva of which 

 is found in the egg masses feeding on the eggs and larv£e. In our 

 examinations no signs of it were seen, except, perhaps, on twigs from 

 Elizabeth, July 10th, in which a young larva that may have been this 

 species was observed. 



Other parasites and enemies of this scale have been recorded, but 

 if they occur in New Jersey the}' must be rare, as they were not ob- 

 served during the past season. 



