KEY TO AMERICAN INSECT GALLS 



21 



Reared from same gall 



Itonid. Arthrocnodax sp. 

 Deformed, infertile berries of J. s c o p u 1 o r u m. Fig. 15. 



Hym. Juniper berry wasp, C li a 1 c i d sp. a2603 



Flowerlike, apical, greenish brown or pinkish deformations composed of four 



reflexed and slightly thickened leaf scales on J. s c o p u 1 o r u m. Fig. 14. 



Cynipid. Juniper rosette gall, C y n i p s sjj. a26o2 



Thickened, slightly reflexed reddish-brown leaflets of last year's growth on 



J. s c o p u 1 o r u m, possibly an older stage of the preceding. 



? Itonid. ? C e c i d o m y i a sp.^ a2827 



Fig. 16. Wheat 

 joint worm, Iso- 

 s o m a grande 

 Riley. Infested 

 stem. (Original) 



Pig. 17. Hessian fly, Phytophaga 

 destructor Say. Infested stems 

 showing pupae. (Author's illustration) 



Prickly burrlike bud galls with numerous short, nearly straight leaves, none 

 reflexed, diameter .5 cm. Felt 'i8d, p. 380 



Itonid. A 1 1 o m y i a 3 u n i p e r i Felt 

 Apical rosette gall, diameter 1.5 cm, greenish (brown when old) with a variable 

 whitish pubescence, leaf bracts reflexed 



Itonid. Ceci.domyia sp. a28i4 



Globose twig enlargement showing a gelatinous growth in June, diameter 3 cm. 



Fungus. Cedar apple, G y m n o s p o r a n g i u m g 1 o b o s u m 



Sabina sabinoides (wild Texas or mountain cedar) 



Reared from bud gall. Felt '16, p. 30 



Itonid. Mountain cedar midge, W a 1 s h o m y i a texana Felt 



'Epitetrasticus silvae Girault was reared in large numbers. 



