•r.ri.Tl.KVTF.^r\ NH-IDS \ .M ) ( NM I'H >( A S i . Al 1 > ' iN i»\K->. ,).» 



"I'lTis ltmII (litfrrs jroin a wry similar species. //. thir'<-<H?(i, 

 !lia.s.s., which (u-curs on the same oaks, in that tfie laU(M- !ias a 

 vorv small, alnwst lioriiv, tcat-lilce projection, is i-uore irlolin- 

 8ar in fonn aiul has the central coll with its irroatest <liaineter 

 ]iarallel witb the Innlv. J1. luisspftl-t (^n the otlaer lian'J, has 

 the i^reatest () iaivieter nf the central cell i^orpiMuliculai' to the 

 limh at the jwnnt of attachment of the irail. I an\ sinv tiiat 

 •one who has seen typical forms of hoth spncies \\'\\\ never 

 mistake the one for the other. The files aj^pear In X<>\ cm- 

 il)er, and are all feiiiales. lueniilh, (»ne-sixth (»f an inch; [)re- 

 •vailinir colors, Ulack and hrown; Unt on aecouut of a dense 

 irray puhcscence which e^nevs nearly all p:\rfs, they have ;i 

 irrayish api)earance nnti! denuded ; nnfennfr. 1 ;)-jointe<^l, third 

 joint the Utnirest. Thorax markeci \rith what seems to he six 

 Jonofitudinal black lines whicli ext(Mid i)artiany or entirely 

 ncross it; ahdomen shinino- Mack with a jjatch of i;ray pnhes- 

 cence heneath the winirs on eitiier sidv^ 



(Jyntps n/gricon:^, n. sp. Jrrc^iruiar eone-sha])ed iialls which 

 oceiir in elusters on tln> midcr side of the leaves of tlie swamp 

 oak {Q. hicolor). The iralls are attached to the inid-rih and 

 fall to the irronnd a little Ix-fore the leaves beirin to di-oj) in 

 October. These resemble very much small clusters of f'l/uijjs 

 xfrobilana O. S. Fly, black in color: nearly one-eii>hth of ari 

 inclr in lenath ; body appearinir to be covered with minute 

 scales, when viewed with a hiirh power: n)tfr)))i<i\ K>-jointed 

 :ind sli^'htly clublted ; parapsidal i^roox cs dee]) and narrow 

 ;ind widely sepnraierl at collar; abdomen mi\iut(>Iy pnnclal<> 

 :md set with hairs. Only known m female form. 



^irrffsjj/s ri/Jf)SHs, n. sp. The iralls aie very hard i;lobulai" 

 oxcrescence.s on tlie under side of the leaves of tln^ I>urr oak 

 (Q. mn<')r)rarjia). The irallsare liirht yellow in cohu- and'are 

 covered with a dense irrowth of stout hair of the same color. 

 LarL'"c sjn'cimens of this ifall measure over one-fourth of an 

 inch in diainetei-. TIjc L'"alls contain a >ini;le tly each, app<-ar 



