American Insect Galls: Thompson 



23 



(5) Galls attached to the leaves— 

 Rhodites bicolor Harr. '41, p. 399 (Cynips), fly, Mass.; = Rh. tumidus, Townsend, Psyche '95, 

 p. 272, 307: 0. S. '63, p. 43, 48-49, cf 9 , Conn. : Harvard Coll., Ottawa, Ala., Mass.: 

 Gill, '92, Colo.: Beut., N. Y.: Provancher, vol. 2, p. 160, Quebec: Cook '05, Ind.: 

 Riley '70, Miss. : Harvard Coll., R. lucida, Me., R. ruhiginosa, Montreal, Cal., Conn. : 

 R. I., Mass. Gall ov(S' winters. Globular, spinose, plate 5, 5. 

 *Rhodites gracilis Ash. '97, p. 135-136, d" 9 , Mich, and Iowa. (?) May 7. 



Gall subglobose, with crown of irregular spines, diameter 2-3 mm. On R. blanda, R. lucida. 

 Rhodites poUta Ash. '90, p. 14, cf 9 , Rosa caKfornica, Cal., Colo., Dakota: Gill. '93, Colo.: Ash. 

 '96, Colo., Wyo. 

 Globular; not spiny. 

 Rhodites nebulosus Bass. '90, p. 63-64, cf , R. Carolina, R. blanda, 3-16 in., globular. 

 Rhodites ignota 0. S. '63, p. 43-44. 49, c^ 9 , R. Carolina, Md., Conn. Late May. Harvard 

 Coll., Conn., Mass.: Beut., R. Carolina, N. Y.: Gill. '92, Colo.; Ash. '86, '87, Fla.: 

 Rosa nitida, MsLSS. Overwinters. Fly May. Oval, white bloom, hard, plate 5, 100. 

 Rhodites Carolina Ash. '87, p. 133, 148, 9 , R. Carolina, N. C. 



Like ignota but monothalamous. 

 Rhodites roseefoliae Ash. '90, p. 13-14, 9 , R. arkansana, Colo. : Gill. '90, Colo. 



Small, disc-like; on leaves. 

 Rhodites variabilis Bass. '90. 



Reniform; on twigs and leaves. (See page 22.) 



GALLS ON CINQUE-FOIL {Potentilla) 

 Gonaspis potentillse Bass. '64, p. 689-690 (Diastrophus) , cf 9 , P. canadensis, Mass., Conn. Late 

 May. Beut. Cat. '04, N. Y., N. J. 



P. canadensis, Mass., R. I. Over winters. Globular in axils, plate 3, 63. 

 Diastrophus minimus Bass. '00, p. 325-326, cf 9 , P. canadejisis, Mass. 



Blisters on stems. 

 Diastrophus niger Bass. '00, p. 324-325, cf 9 , P. canadensis, Fragaria (?), Mass. Early June. 



P. canadensis, Mass. Over winters. Stem swollen, plate 8, 83. 

 Diastrophus fusiformans Ash. '90, p. 13, 9 , Colo. 



Slight stem swelling. 



GALLS ON RASPBERRY OR BLACKBERRY {Rubus) 



1. On the Roots: 



Diastrophus radicum Bass. '70, p. 98-99, d' 9 , R. villosus, Conn.: Gill. '89, Raspberry, Mich.; 

 fly, late May: Beut. '04, R. occidentalis, N. Y.: 

 Rubus strigosus, R. canadensis, Mass., R. I. Irregular in size, plate 5, 155. 



2. At the Crown: 



Diastrophus bassetti Beut. Cat. '92, p. 248-249, pi. 9, fig. 7, <f, R. canadensis (?), N. J.: Beut. 

 '04, R. canadensis, N. Y. : 

 R. canadensis, R. I., Mass. Globular; near ground, plate 3, 99. 



3. On Stems: 



A. Mossy excrescences — 

 Diastrophus cuscutseformis 0. S. '63, p. 39-40, cf 9 , "Blackberry," Md.: Harvard Coll., R. vil- 

 losus, Md., Mass.: Beut. '04, N. Y.: Cat., R. villosus, N. J.: Ash. '96, Nebr.: Cook 

 '05, R. villosus, Ind. : Walsh '64, 111. : Webster, Ohio. 

 R. villosus, Mass., R. I. Over winters. Fly, late in May, plate 5, 115. 



