ist)!.] (•..') 



i:;ill (111 the leaves of the wliite oak, except tliat its femora ami tiy^ia^, es- 

 pecially the posterior ones, are infuscated. I call it Ci/tiipa quprcua i^np- 



ilhttd 11. sp. 



15. QuKRCUS OBTUSILOBA. P<j>it Oak. Irreynlar, flattened galh, 

 projecting on both mJea of the leaj\ yelloio^ ivhen, ripe and dry., and of a 

 nnhxtance not unlike soft wood or pith, e)te/osin(/ sererai hollow kernels. 

 Cynips quercus irregularis n. sp. 



The sizie of this gall depends on the number of kernels it contains. 



One specimen in my possession, about 0.4 long and 0.28 broad, is pierc- 

 ed with IG holes through which its inmates had escaped; but they may 

 have been small parasites. The average size of these galls is between a 

 quarter of an inch and half an inch in length. Sometimes several of them 

 are packed closely together and separated only by furrows. The color of 

 the galls, when ripe is a light leather-yellow; their substance resembles 

 then the pith of a plant, being softer than wood and still hard enough not 

 to shrink in drying. When examined under a lens of moderate power, 

 the gall appears to be covered with numerous little points or small cones, 

 each bearing a few short hairs on the tip, Avhich under such a mag- 

 nifying power gives the surface a shaggy appearance. On the 29th of 

 iMay, when I first discovered these galls, some of them, although yet green, 

 were already pierced with holes. Other galls still contained larvae much 

 later in the season. The only fly obtained from these galls was accidently 

 injured, so that I can give only an incomplete description. 



Cynips quercus irregularis n. sp. — Head brown, mouth yellowish ; antenn» pale 

 3'ellow, tliird joint thrice longer than the fourth, slender, somewhat curved, atten- 

 uated towards the base, stouter towards the tip; three following joints almost of 

 the same length (the remainder are broken); thorax brownish superiorly, jiale be- 

 neath, smooth, shining; feet pale, tips of tarsi infuscated; wings somewhat grey- 

 ish; radial vein almost paj'allel to the anterior mat-gin ; this renders the radial area 

 unusually long, linear; its tip is somewhat rounded; the terminal portion of the 

 subcosta, joining the anterior margin, is also unusually oblique and therefore long; 

 the pale spot on the subcosta, close before the second transverse veinlet, is very 

 distinct; the areolet is distinct, of moderate size; cubital vein distinct; basal vein 

 (or fii-st transverse veinlet) dark brown, with a slight brownish cloud; the other 

 thick veins are of a paler brown. Length 0.08 (?). 



This species will be easily recognizable on account of its elongated, al- 

 most lanceolate radial area. The unusually pale coloring of my specimen 

 makes me think that it is immature; still the wings are perfect. The 

 structure of the third joint of the antennae and the size of the wingrs seem 

 to indicate a male. (The abdomen is broken.) 



K). Quercus RUBRA. Rrd Oak. Small, irregulnr, hard protiihcrimrp, 

 projrrfliiij ov hnih sides of t],( hdfond loit il iffrrliiij from it in color. 



