•"iS6 [December 



Xo. 5. Gall S. rhodoides, n. sp. — On S. huinilis. A monothalamous gall like 

 an elongated rose, always growing singly on the tip of a twig, porrect, its gene- 

 ral outline elongate-spherical, occasionally spherical and rarely short-spheri- 

 cal, .90 — 1.80 inch long and .70 — 1.90 inch in diameter, never with any twigs, 

 towever small, growing round it from tlie same stem. The leaves composing 

 it are slightly pubescent, entire, with the midrib and branching side-veins very 

 conspicuous, and are almost always opened out and with their tips recurved 

 and occasionally at the extreme tip a little pinched together, but in a few cases 

 they are loosely appressed except at the tip of the gall. The basal ones are 

 small, the following ones larger, all sessile and heart-shaped with the basal 

 lobes of the heart squarely truncate and the tip almost always taper-pointed 

 in an angle of 70"^ — 80°; towards the tip the leaves become smaller and 

 gradually more and more peduncled, till at the extreme tip the pedun- 

 cle is generally twice as long as the leaf itself. Inside the gall the leaves 

 suddenly become linear-lan<;eolate and gradually straighter as they approach 

 the centre, till they finally embrace the lanceolate central cell precisely as in 

 S. strobiloides. Sometimes the peduncled leaves at the tip protrude from the 

 gall as the stamens and pistils of some flowers protrude from the corolla. 



Described from 15 galls freshly gathered in November, and 50 — 70 

 gathered in July. Very common in Rock Island County, Illinois. This 

 gall arrives at its full size by the middle of July, when the outside leaves 

 are externally palish green, often changing towards the tip of the gall 

 to pale yellowish green slightly tinged with ro.sy and externally more 

 or less glaucous. In the autumn the leaves become pale greenish brown 

 with a slight whitish pubescence externally, and, after hanging on the 

 twig over a year, almost black. 



Larva. — By July 30 the larva is already .07 inch long, subhyaline. 

 with opu(|ue, curdy, white markings, and a long internal yellow stripe 

 representing probably the intestinal canal ; breast-bone indistinct. No- 

 vember 10, out of about a dozen galls opened, all but one larva had 

 formed their cocoon, which exactly resembles that of (,'. s. strobiloides. 

 The breast-bone in all was quite distinct and resembled exactly that of 

 C. s. hrassicoides, varying in the same manner, and in all other respects 

 the two larvae were undistinguishable. Length .10 — .12 inch. On 

 February 25 the larva (many specimens) was .15 inch long, pale orange. 

 the orange color mostly concealed, except the sutures and sometimes 

 the 3 anterior joints and a dorsal line, by whitish, bowel-like markings. 

 A larva examined April 23 was .10 inch long. .07 inch wide, yellowish 

 opaque, with whitish bowel-like markings and a broad dorsal fuscous 

 vitta. Breast-bone as in C. s. strobiloides. 



