36 Bulletin 2: Springfield Museum. 



7 min. in diameter. Green, becoming brown early. On high blackberry, 



Rubus nigrobaccus. 



Lasioptera nodulosa Beutenmuller. 



Ltisioptera uodttlosa Bout.. Hull. Amcr. inns. nat. hist . 1907, v. 23, p.397, pi. 15, fitf. 5-6. 

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



"Knot-like or gouty, elongate or rounded swelling on terminal branches 

 of blackberry, Ricbns nigrobaccus. Often several galls on a single twig. 

 Elongate chamber inhabited by a single larva which transforms in the gall, 

 and emerges in May or June." 



Diastrophus cuscntaeformis Osten Sacken. Blackberry seed-gall. Fig. 68. 



Diastrophus cuscutaeformis < >sten Sacken, Proc. Ent. soc. Phil., 1863, v. 2. p. 33-34, 39-40. 

 Walsh ami Riley, Amcr. cut., 1869, v.l. p. 188. 

 Beutenmuller, Bull. Amer. mns. nat. hist., ls;<2, v. 4. p. 249, pi. 10, 



flg.l. 

 Jarvis, 38th ami. rept. Ent. soc. Ontario, 1907, p. 89. ' 



Small subglobular galls, many crowded together along and around the 

 stem of the blackberry. Monothalamous, Same color as stem. Each 

 bears one (or sometimes more) spines, some rather stiff, others filamen- 

 tous. On high blackberry, Rubus nigrobaccus. Rather common. 



Diastrophus nebnlosus Osten Sacken. Blackberry knot-gall. Fig. 67. 



Diastrophus nebulosus ( >sten Sacken, Proc. Ent. soc. Phil., 1863, v. 2, p. 36-39. 

 Riley, Pract. cut.. 1867, v. •_'. p. 83, 84. 

 Walsh ami Riley, Amcr. cut., lso<>, v. 1, p. 188. 

 Riley, Amer. cut.. l*7n. v. 2. p 159-160, tiy;. 103. 



Beutenmuller, Bull. Amcr. inns. nat. hist.. 1892, v. 4. p.-'V.h pi. 10. ti^-. 2. 

 Conk. Ohio nat., 1904, v. 4. p. 119, 143, tig. 129. 



k A large oblong pithy gall on stem, furrowed lengthwise, abrupt from 

 union with stem. Polythalamous. Green, changing more or less com- 

 pletely to red-brown when old. On stems of high blackberry, Rubus 

 nigrobaccus. Common. Insects emerge the following spring. 



Rubus procumbens. 

 Diastrophus iiussctiii Beutenmuller. Bassett's blackberry gall. Fig. 69-70. 



Diastrophus l>iixx<nii Beutenmuller, Bull. Amcr. urns. nat. hist., 1892, v. 4, p. 248-249, pi. 0, tig. 7. 



A snbspherical red-brown gall, sometimes with considerable green. 

 Pithy, polythalamous, <S-12 mm. in diameter. Quite common at base of 

 stem of running blackberry, Rubus procumbens, and swamp blackberry. 



R. Ill spiii us. 



Rubus hispidus. 

 Diastrophus bassettii Beutenmuller. See above. 



Fragaria virginiana. 



Cecidomyia? reniformis, n. s. Fig. 71-72. 



A polythalamous gall, somewhat reniform, attached by end or side to 

 base of petiole of strawberry, Fragaria virginiana, so close to the ground 

 :is to usually escape observation. 8-21 mm. long by 11-20 mm. thick. 

 The color is like that of the petiole. Light-colored pith in which are im- 

 bedded the spherical bard-walled cells, each containing one or occasionally 

 two larvae. 



