64 ■ [October 



the leaf remaining green. When taken from the tree in their fresh and 

 succulent state, they shrink when dry, become reduced in size and almost 

 unrecognizable. I first noticed these galls on the 14th of May when they 

 were nearly full-grown. On the 15th of June they hardly had changed 

 their appearance, but the larvae in the kernels had grown to their full 

 size. On June 23rd some of the kernels already contained the pupa and 

 between that date and the 2nd of July the gall-flies began to escape from 

 the galls I had bi'ought home. Besides the gall-fly, I obtained one of the 

 Inquilinse, which may be an Aylax Hartig. 



Cynips quercus futilis n. sp. — Black; slightly reddish at the mouth; palpi, an- 

 tennse and feet yellow; coxoe blackish at base; posterior femora slightly infuscated 

 superiorly; thorax smooth, hardly aciculated; scutellum somewhat punctate; ab- 

 domen shining; second segment about four lines longer than the third: following 

 segments very much contracted under the second; antennae 15-jointed, first joint^of 

 the fiagellum a little longer than the others, which are of the same length: wings 

 immaculate, thick veins brownish-yellow; areolet extant, small: cubitus distinct, 

 although very slender; somewhat obsolete only at the base. Length 0.06. 

 Four % specimens. 



Aylax (■?) futilis n. sp. — Black, mandibles yellowish-brown; antenure 14-jointed, 

 yellowish-brown, first joint brown, base of flagellum paler; third joint longer than 

 the others, somewhat excised inferiorly; feet brownish-yellow; posterior feet al- 

 most brown, yellowish only at the articulations; thorax rugose-jjunctate, with a 

 short, scattered pubescenee; pleurae with a smooth, shining black spot; abdomen 

 shining, second segment not much longer than the third, the two following very 

 short ; wings immaculate, thick veins brownish-yellow ; radial area closed, the 

 subcostal being prolonged along the anterior margin of the wing as far as the tip 

 of the radial vein. Length 0.06. 



Single specimen, apparently a male. 



At first glance, this species looks very much like the preceding, being 

 of the same size and color; but it is easily distinguished by the usual char- 

 acters of the Inquilinse^ the form of the radial area, which is closed, the 

 position of the areolet, etc. I am far from being certain as to the genus 

 to which this species belongs. 



14. Quercus PRINOS. Sifamp-cliest^int Oak. Small, rounded galk, 

 projecting on hotlt aides of the leaf] sonieu-Jiat nipple-shaped and enclosed 

 in a reddish cmreole on the iinder side. Diameter about 0.15. Cynips 

 QUERCUS PAPILLATA n. Sp. 



The reddish aureole surrounding the nipple-shaped protubei'ance on the 

 under side of the leaf is very characteristic. The inside of these galls con- 

 tains two or three reniform kernels, with a larva in each compartment. 



They occur in numbers on the same leaf. In the latter part of June 

 1 obtained the perfect insect. It was a single specimen, apparently a 

 male, resembling in all respects ('//nips qit< mis fulilis. obtained iVnm the 



