NEW VOUK STATE ML'SEUM 



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aljundancc. Professor Lowe has observed them at Geneva N. V.. as earlv 

 as May 7. They soon settle in a place and begin sucking nourishment 

 from the underlying bark tissues, and in about 2 days, white waxy filaments 

 extend from the back of the \()ung. and when numerous, the infested 

 branches are adorned with patches of wiiite woolly matter. This excre- 

 tion mats down and soon forms a protective covering which is supple- 

 mented later by the cast skins of the insect. I-'uliy developed females may 

 be found about the first of August and egg laying begins soon after and is 

 completed by the latter part of the month or early in September. One 

 'emale deposits from 50 to 100 eggs. 



Food plants- This 

 species is of economic 

 g^. importance chiefly on 

 = account of its depreda- 

 tions on some of our 

 more valuable fruit trees 

 as previously pointed out. 

 It also occurs on ash and 

 poplars in considerable 

 p. ,•,••, r- , , . ,w „ , numbers and has been 



FlK. 35 A » p 1 d 1 o t 1 p h .1 K u s c i t r i ii ii s Crriw., grf.-itly enlarged. (After How.ircl. 



Insect Lite. i3>v4. 6:..,) recordc'd on willow, lin- 



den, horse-chestnut, elm, sugar and swamp maple. 



Natural enemies. ;\ small hymenopterous maggot was observed by 

 I )r I'ilch to live on tlie eggs of this ])est. What was in all iirobaliility the 

 same jjarasite was described by Dr Le Baron some years later as A phel i- 

 nus m )t i 1 asp id i s, which he found had destroyed from about 50;; to 

 6o;« of the scales. .\ p li e 1 i n u s f u s c i p e n n i s How. is recorded as a 

 most efficient parasite of this scale in California. A s p i d i o t i p h a g u s 

 citrinus Craw, has been reared from this pest in that state. The 

 accompan\ing figure will give a good itlea of the appearanct? of these tiny 

 Chalcids. The best evidence of their work is the small circular holes in 

 Hie dead scales, orifices by which these little friends have escaped. 

 .\plielinus abnormis llow. is another parasite of this bark louse. 

 .\ n a p h e s gracilis H ow. and C h i 1 o n e u r u s d i a s p i d i n a r u m 

 How. have also been reared from this insect. 



