588 [December 



yellowish. A % examined April 28 had the dorsum of the abdomen 

 entirely fuscous, but on removing some of the dorsal hairs the sutures 

 were narrowly blood-red when viewed from behind. The venter was 

 dark blood-red on removing some of the white pubescence which con- 

 cealed the color. A mature 9 on April 21 had the dorsum of the 

 abdomen fuscous, except the sutures which were slightly brick-red. 

 Another 9 less mature had the whole dorsum of the abdomen a dirty 

 red and the venter brick-red. April 22 a 9 had the abdomen dorsally 

 fuscous with a few appressed brown hairs with no reddish sutures, the 

 venter dull rufous and the oviduct rufous. Another 9 April 25 had 

 the dorsum of the abdomen fuscous, with the sutures narrowly sangui- 

 neous, but only when viewed from behind. The venter, on removing 

 some of the short whitish pubescence, was dark blood-red. Dimensions 

 about the same as in C. s. hrassirou/es. Eight % , seven 9 • The first 

 imago appeared April 12 and the last April 28. 



No. 6. Gall S. coryloides n. sp. — On S. discolor? A very large and loosely 

 expanded, monothalamous gall, resembling at a distance a bunch of hazel-nuts 

 in their natural husks, growing singly at the tip of a twig without any shoots 

 surrounding it. porrect, its general outline spherical, sometimes elongate-sphe- 

 rical or short-spherical, 1.76 — -2. .35 inch long and 1.95 — 4.10 inch in diameter. 

 The leaves composing it are on the outside large in proportion to the size of the 

 gall, so that some of the middle ones are occasionally two inches across, free 

 from pubescence except sometimes on their external base, entire, with the 

 normal midrib and branching side-veins distinct, and are all of thera very- 

 much opened out and recurved, the basal ones the most so, so that the latter 

 often touch with their tips the twig on which the gall grows. The basal leaves 

 are orbicular-ovate or ovate, only slightly smaller than the middle ones ; the 

 middle ones are ovate, and both basal and middle ones have their tips tapering 

 regularly in an angle of about 80° — 90°, not taper-pointed in an angle of 70° — 

 80° as is generally the case in S. rhodoides ; and their base describes an angle of 

 about 90°, instead of being squarely and widely truncate, as in S. 7-hodoides, 

 and even on the extreme base of the gall generally has a short peduncle 

 nearly ^ as long as the leaf itself, which in each successive leaf gradually 

 becomes longer as the tip of the gall is apjjroached, when it is about equal 

 in length to the leaf, which has now become oblanceolate. On the inside, the 

 leaves suddenly become straight, porrect, and very much smaller, and are elon- 

 gate-linear with their tips tapered to a very acute point, closely appressed, and 

 gradually smaller, till they finally embrace the lanceolate central cell. In the 

 autumn the leaves of this gall are dark reddish-brown, externally with a slight 

 whitish bloom; at other seasons it is unknown to me. 



Described from 4 specimens. Very near S. rhodoides, which occurs 

 on a totally different willow, but sufficiently distinguished by the cha- 



