KEY TO AMERICAN INSECT GALLS iS/ 



Caprifoliaceae (honeysuckle family) 

 Diervilla (bush honeysuckle) 



Green bud gall or enlarged fruit, length 4 to 5 mm. Felt 'i6d, p. 140 



Itonid. Bush honeysuckle bud midge, Asphondylia diervillae 



Felt 

 Reared from apparently normal stems having a diameter of 3 to 4 mm. Felt 

 '07a, p. 162 



Itonid. Bush honeysuckle stem midge, Lasioptera caulicola 



Felt 

 Lonicera (honeysuckle) 

 Irregular, lobulatc bud gall with a short, rusty brown pubescence, diameter 7 

 to 10 mm. 



Itonid. C e c i d o m y i a sp. a2657 



Symphoricarpos (snowberry) 

 Irregularly thickened, distorted leaflets. Felt '14c, p. 132 



Itonid. Thomasia californica Felt 

 Fusiform twig gall. 



Itonid. Cecidomyia sp. 



Viburnum (arrowwood) 

 Globose bud gall, length 4 mm. Felt 'i6d, p. 104 



Itonid. Arrowwood bud midge, Schizomyia viburni Felt 

 Purplish swellings on the lateral veins, length 5 mm. PI. 13, fig. 5. Felt '151, 

 p. 280 



Itonid. Purple vein midge, Sackenomyia viburnifolia 



Felt 

 Purplish discolorations along the veins, showing on both sides of the leaf and 

 making a striking pattern, on V. p u b e s c e n s. Fig. 208. Chad wick 

 '08, p. 150 



Acarid. Eriophyes sp. 

 Minute, blister gall on the under side of the leaf, diameter 2 mm. PI. g, fig. 7. 

 Felt 'iik, p. 480 



Itonid. Arrowwood blister midge, Cystiphora viburnifolia 



Felt 

 Circular, blister gall, diameter 1.5 to 2 mm, on V. c a s s i n o i d e s. Felt 

 'iij, p. 474 



Itonid. Cecidomyia sp. 

 Pustule, blisterlike gall with pinkish aureola, diameter 3 mm, on V. a c e r i- 

 folium. Felt ' i ij, p. 474 



Itonid. Arrowwood spot gall, Cecidomyia sp. 

 Inconspicuous, pale green, circular leaf mines, diameter 5 to 6 mm, on 

 Y . o p u 1 u s 



Itonid. Cecidomyia sp. a2764 

 Oval, greenish, blister gall, showing on both surfaces, diameter 2 mm, larvae 

 deep red, escape through a central hole in the upper surface, on V. d e n- 

 t a t u m. Felt '11 j, p. 474 



Itonid. Cecidomyia sp. 



