INSECTS AFFECTING I'AKK ANU WOODLAND TKEES 633 



riic devclo|JiiiciU ot the j^all is iiUcrcstinj;'. It ajjpcars lo be formed 

 l)V llie irritation due to one or more larvae on ilie u|Ji)er surface of the 

 midrib of the leallcl. The Ioniser, more consi)icuous i^alls arc inlial)ilcd by 

 a considerable luimber, while smaller ones may contain onl\- one or two or 

 three larvae. In each instance' it will \k- observed that the tissues on either 

 side of tlie mitlrib anel includinL;' it to some extent, be^in to swell enor- 

 mously, thicken ami j^rradually close over the irritating larva. The Wy has 

 not been bred, due to the rapid witherim^; of the gall, in spite of several 

 attempts to obtain the ailult. When youn^^ the gall is a pale green 

 and as it ages it becomes tinged with brown. It is thick and the hyper- 

 trophied tissue is very succulent [fig. 169 |. Tiiis species has been recorded 

 by Professor Beutenmuller from b'ort I.ee N. J., where it occurs in June. 



Red elm leaf gall. Poiiphis^iis ulmifiisiis Walsh. The solitary spindle- 

 shaped galls produced b\- this plant louse on the upper surface of the leaves 

 of the red elm, are about an inch long. This species is rare in New \'ork 

 State. It occurs in small numbers on slippery-elm. 



Ash flower gall 



Eriopliycs fraxinillora n. sp. 



The staminate flowers of white? ash are sometimes ver\- curiously 

 deformed by the work of a small gall mite, which appears to attack theni 

 about the time they begin to develop, and l)y the latter part of )une 

 peculiar irregular masses of green tissues are found on the flower stem. 

 An examination shows that each mass consists of a scries of irregular, 

 fringed, lobulated masses joined one to the other, each group at this time 

 ranging from V^ to about ^ inch in tliameter. Later they become nearly 

 Y^ inch or more in diameter, eventually drying and remaining on the trees 

 over winter, giving the infested ones a very peculiar appearance. The 

 work of this mite appears to be moderately common in New York .State, 

 though it does not seem to ha\e attracted much attention. Specimens of 

 this mite's work have been received from Brooklyn \. ^^ where it appears 

 to infest several trees year after year, and we have also observed its 



