1907 ENTOMOLOGICAL SOCIETY. 89 



Blackberry Seed Gall (Diastrophus cuscutaeformis, 0. S.). 



Consists of hard, woody, somewhat globular seed-like bodies 2 to 4 mm. 

 in diameter. More or less covered with curved spines which are about 2 

 mm. long. Yellowish green or olive in color and borne in clusters on the 

 stem, each gall containing one chamber. Eare at Guelph. Occurs on Black- 

 berry (Rubus villosus). 



Raspberry Stem Gall. (Diastrophus turgidus, Bass). Plate B, fig. 2. 



A large reddish-brown polythalamous, tubercular or irregular gall, about 

 1 to 1.75 in. long and .5 in. in average diameter, arising abruptly on the stem. 

 Green in summer, darkening towards winter. Chambers are very numcTous, 

 oval in shape, 1.5 to 2 in. in width and 2.3 in. deep. The gall has a 

 number of prickles scattered over it which are about 2 to 3 mm. long, and 

 appear to be enlarged stem prickl-es. 



Oval Willow Stem Gall (Euura S. nodus, Walsh). 



"A mere general enlargement of a twig from one-quarter more than its 

 normal diameter up to twice its normal diameter, almost always without any 

 abnormal roughness on the external bark, and not always confined to one 

 side only of the twig. General color tEat of the twig. When cut into 

 (August 28th), the interior of each gall is found to be pithy and to contain 

 1 to 3 larvse in separate cells. Frequently on a piece of twig 6 in. long, 2, 3, 

 or 4 of these galls are placed at irregular intervals. No appearance inter- 

 nally of any transverse plates or transverse fibres as in S. ovum and S. ovulum. 

 Length .75 to 1.50 in., diameter .10 to .25 in. Yery like the Cecidomyidous 

 gall, S. noduJus, on the same willow (Proc. Am. Ent. Soc, Philada., Ill, p. 

 600) but is much larger, is polythalamous instead of monothalamous" 

 (Walsh). The specimens found at Guelph were from .50 to .75 in, in length. 

 The adults of any specimens examined on May 30 had emerged. Occurs on 

 the Scrub Willow (SalLi sp.). Common in some localities. 



Rose Leaf Nipple Gall, (Rhodites lenticidaris, Bass). 



This is a small circular gall of about 3 mm. in diameter. The upper 

 surface is practically on a level with the surface of the leaf and is pale green 

 in color. It is characterized, however, by the presence of a little nipple in 

 the centre, the nipple often being of a purplish shade. The under surface 

 is slightly raised beyond the rest of the leaf and, unlike the upper, is purplish 

 in color and has a slight depression in the centre corresponding to the nipple 

 above. The galls occur singly or, more commonly, in groups, often covering 

 the whole leaf and making its surface uneven. Found on the Rosebush (Rosa 

 sp.). Rare. 



Oak Wart Gall (Ainh-irus futilis, 0. S.). Plate B, fig. 4. 



This is a rather small, wart-like gall situated in the parenchyma of the 

 leaf and protruding beyond both surfaces, but chiefly beyond the lower. The 

 protuberance on the lower surface is roughly hemispherical in form, averag- 

 ing 4 mm. in diameter and 2 mm. in height. Its surface is often smooth and 

 even, but quite often it is uneven or pebbly. The color is considerably 

 lighter than the rest of the under surface of the leaf. The protuberance on 

 the upper surface is much the same shape and nature, but is not so high a'^ 

 a rule, being usually only about 1 mm. in height. Its color is also lighter 

 than the color of the surrounding part of tlie leaf, but darker than that of the 

 under side of the gall. The walls of the gall are thin and much the same 

 lexture as the parenchyma of the leaf. The Interior contains a kernel com- 

 posed of two small oblong cells joined together along the side parallel to their 

 longitudinal axis. Each cell has a small cavity within it containing a single, 

 small, white larva. The adult insects emerged about July 30, 1907, and were 

 small, reddish Cynipids. One to several galls may occur on a leaf. They 



