1907 ENTOMOLOGICAL SOCIETY. 87 



great numbers. A light-colored areola surrounds tlie gall which, is mono- 

 thalamous and contains a small larva which moves about quite actively when 

 disturbed. Generally about .5 cm. in diameter. Not commonly distributed 

 but, when found, occurring in great numbers. Late July and August. 

 Found on Cornus sp. Common at Guelph. 



Willow Joint Gall. (Rhabdophacra nodulus, Walsh). Plate A, fig. 9. 



A rather small, irregularly, oval enlargement of the stem at the joints 

 or nodes, about 4 to |^ in. in length and \ in. in diameter; the texture is 

 woody; the surface smooth and like that of the bark; monothalamous. It 

 occurs on the stem and branches of the Scrub Willow (Salix sp.). Fairly 

 common at Guelph. 



Hickory Cone Gall, (Cecidomyia sanguinoJenta, O.S.). 



This is a conical or sometimes almost spherical gall, situated on the 

 under surface of the leaf along the veins. It is much constricted at the point 

 of attachment with the leaf. Height about 4 mm., igreatest diameter 3 to 4 

 mm., surface even, slightly pubescent, color at first red or purplish, later 

 turning brown, monothalamous. The surrounding walls are nearly 1 mm. 

 thick and of close, firm texture when mature. Numerous galls are usually 

 found on a single affected leaf. They occur on the Sweet Hickory (Carya 

 albai). Common in some localities. 



Hickory Seed Gall, (Cecidomyia caryoecola, 0. S.). 



This is a conical gall with a fine, elongated tip. It is about 5 to 6 mm. 

 in length and 2 to 3 mm. in greatest diameter, is smooth, pale green, turning 

 brown in autumn, monothalamous; the enclosing walls are about .5 mm. 

 thick, close and firm in texture when mature. It is found singly or in large 

 numbers along the veins on the under side of the affected leaves of the Sweet 

 Hickory, (Carya alba). Common in some localities. 



Grape Vine Tomato-Gall, (Lasioptera vitis, O. S.). 



"Consists of a bunch of irregular swellings of various rounded shapes. 

 Soft, juicy and succulent. Yellowish green, tinged with red or entirely of 

 this color. On stems and leaf stalks of Wild Grapes. May and June. Com- 

 mon." (Beutenmuller). I have not seen the gall myself, but it is reported 

 from Ottawa by Dr. Fletcher, in the Report of the Entomologist and Botanist 

 for 1887, page 29. 



Bunch Gall on Willow. (Rhabdophaga brassicoides). 



This is a gall of the same type as Cecidomyia solidaginis . It consists of 

 a bunch of massed leaves which surround a small cell containing a yellowish 

 larva. Growth having been checked at the end of the stem, this cluster of 

 leaves has been formed. Occurs on Scrub Willow (Salix sp.). Not common, 



Goldenrod Terminal Gall (Asphondylia monacha, O. S.). 



This gall occurs at the tip of the plant and is a leafy conical structure 

 I to 1^ in. high and h in. in diameter. It consists of many leaflets clustered 

 together and having their basal parts thicker than the part above. This 

 thickened part forms the broad base of the cone, and the thinner part immed- 

 iately above being incurved completes the conical structure. Above this 

 conical foundation the tip of the leaflets extends to a greater or less degree 

 and forms a sort of rosette. Between the thickened parts of the leaflets live 

 from one to many small yellowish white, or in some stages almost orange, 

 larvae. The gall occurs on the Goldenrod (Solidago Canadensis). Common. 



Willow Bud Gall, (Rhabdophaga triticoides, Walsh). 



This- gall seems to be an altered or transformed bud. The bud scales 

 become elongated and the interior becomes a cavity in which the larva lives. 

 The gall is about 5 mm. long, 2 mm. wide, and 1 mm. thick; the side against 

 the stem is flattened. The color and surface are like those of the stem itself. 

 Monothalamous. It occurs on the twigs of the Scrub Willow (Salix sp.) and 



