Insect ( i alls. 35 



Thomas, Trans. Dept. agr. III., f. 1878, 1879, Q, S., V. 8, (Thomas, :',d 



rept. ins. III.), p. L99. 

 Beuteniniiller, Bull. Amer. mus. oat. lust., 1892, p. -J7t;, pi. 16, fig. 5; 



Ins. Kails vicin. N. V., L904, p. 36, fig. 

 Pergande, Bull. 9, tech. series, Div. ent., (7. S. dept. agr., 1901, p. 7-25, 



fig. ill. 

 Cook, 29th anil. rept. Dept geol. and nat. hisl. res. Indiana I. 1904, 



L905, p. 845-846, fig. 38. 

 Jarvis, :>7t li ann. repl . Enl . sue. Ontario, l'.tnn, p, 64, pi. ( . fig. 2. 

 Hamamelistes cornu shinier. Trans. A.mer. <-nt. soc, 1867, v. 1, p. 283. 



A conical, monothalamous gall on the upper side of the leaf with 1 1n- 

 opening underneath. Very common on witch hazel, Hamamelis virginiana. 



ROSACEAE. 

 Spiraea salicifolia. 

 Cecidomyia? lappa, n. s. 



Terminal mass of brown or, when quite young, green, mossy in 

 appearance, strongly resembling Rhodites rosae, but coarser. Each gall 

 consists of an undeveloped bud, the leaves of which have the tips much 

 elongated. The central cavity is enclosed by the overlapping leaves. 

 Not rare. On meadow-sweet, Spiraea salicifolia. 



Cecidomyia salicifoliae Osten Sacken. Meadow-sweet pod-gall. Fig. 64. 



Cecidomyia salicifoliae Oaten Sacken, Proc. Knt. soc. Phil., 1866, v. 6, i>. 220. 



Jarvis, 37th aim. rept. Ent. soc. Ontario, 1906, p. 68; 38th ann. rept. . 

 1907, p. 88. 



A pod-like gall formed by folding of the leaf along the midrib, lower 

 side out, the edges united and the blade bulging out, the sac curving 

 usually with midrib on convex side. 7-8 mm. long. Brown, with the 

 pubescence of the under side of the leaf. On hard hack, Spiraea tomentosa. 

 Not rare. Summer. 



Same on Spiraea salicifolia, from which it was first described. 

 Smooth instead of pubescent. 



Spiraea tomentosa. 

 Cecidomyia salicifoliae Osten Sacken. See above. 



Rubus nigrobaccus. 

 Cecidomyia? muscosa n. s. Mossy leafy-gall of blackberry. Fig. 66. 

 A subglobular gall, covered densely with filaments, making a mass 

 about 1 cm. in diameter. Green turning light brown. Polythalamous. 

 Found in Aug. 1900 on blackberry, Rubus nigrobaccus, some at union of 

 leaflets, some on midvein. 



Lasioptera farinosa Osten Sacken. Fig. 65. 



Las ioptera farinosa Osten Sacken, in Loew'9 Mon. dipt. N. A.. L862, pt. 1, p. '2u4 

 Smith, Insect life, 1891, v. 4, p. 30. 

 Beuten mailer, Bull. Amer. mus. nut. hist., 1892, v. 4, p. 273;op. cit., 1907, v 



23, p. 397-398, pi. 15, fig. 12-13. 

 Felt, 23d rept. ins. N. V. f. 1907, 1908, p. 321, 323, 325. 



Irregular, rounded, roughened galls on midrib or at base of leaflets. 

 Woody, polythalamous. Sometimes several apparently confluent. About 



