Ins kit Galls. 39 



Rosa rubiginosa. 



Rkodites rosae Linnaeus. Mossy rose-gall. Bedeguar gall. 

 Cynips rosae Linnaeus, Syst. nut., 12th ed. i7i;T, \ . 'J, p. ;»17. 

 Rhodites roscn Osten Sacken, Proc. Ent. soc. Phil. lst;:j, v. 2, p. it. 



Jarvis, 37th ann. rept. Ent. soc. Ontario, L906, p. 70, pi. l>. Bg. 4. 

 There are numerous references to this gall in European publications, as it occurs in 

 Europe. 



A conspicuous mass formed by several hard cells around the stem, and 

 covered with long filaments, mostly green but frequently strongly tinged 

 with red. Brown and persistent in winter. Common on sweetbrier rose. 

 Rosa rubiginosa. Insects emerge in .lime. 



Amelanchier canadensis. 

 Eriophyes amelanchier i n. s. June-berry mite-gall. Fig. 78. 



These rounded galls occur in great numbers upon the leaves. On the 

 upper side they are globular, below they open by a prolonged tube which 

 on maturity splits in two at the end, allowing the insect to emerge. 

 Usually red above, light yellow-green below. About- 2 mm. above, 1-JS 

 mm. below. On June-beny, Ameianchier canadensis, June. 



Crataegus. 

 Cecidomyia bedeguar Walsh. Tufted thorn-gall. Fig. 80. 



Cecidomyia crataegi-hedeguar Walsh, Can. ent., 1869, v. 1, p. 79-80. 

 Cecidomyia bedeguar, Jarvis, 37th ann. rept. Ent. sot-. Ontario, 1906, p. 67. 



A polythalamous gall found along the veins, several on a leaf. Below 

 hemispherical, opening above. The upper side more conspicuous, as the 

 opening is surrounded by dense tufts of finely branched projections brown- 

 er than the leaf. Under side light green-yellow. Pithy, about 4 mm. in 

 diameter below, 6-10 mm. above. Not rare. On leaves of Crataegus sp. 

 June. 

 Cecidomyia? venae, n. s. Fig. 79. 



An irregularly oval fleshy gall on midribs or chief veins, above or 

 below, opening by a slit on opposite side, retaining marks of vein along 

 length; contracted towards ends so running out to substance of vein. 

 5-8 mm. long. Color yellow, sometimes with red tinge. Slightly to 

 densely pubescent. June and later. Several on one leaf. Two or more 

 larvae in a cell. On thorn, Crataegus. 



Undetermined gall. 



An irregular rounded polythalamous gall at base of thorns, 5-10 mm. 

 long, color of bark. Spongy within, dark red-brown, with libers at righl 

 angles to surface. Several on thorn, Crataegus sp. 



DRUPACBAE. 

 Prunus virginiana. 

 Cecidomyia? racemi, n. s. Fig. 81. 



An elliptical, polythalamous gall, consisting of a swelling of the axis 

 of raceme of choke-cherry, Prunus virginiana, 27 mm. long, 10 mm. wide 



