

FIG. 226. Various gall wasps and galls of the oak. I, Spathegaster taschenbergi, male, natural 

 size, two and a half millimeters, the sexual, summer generation. 2, Dryophanta scutellaris, natu- 

 ral size, four millimeters, the asexual, winter generation of 1, appearing in the spring ; 3, ovipositor 

 of female of 1 ; 4, ovipositor of female of 2; 5, egg of 1 ; 6, egg of 2; 7, galls produced by 2, natural 

 size, two to three millimeters ; 8, galls produced by 1, natural size, up to two centimeters. 9, Tera 

 terminalis, male, natural size, three millimeters long, the sexual, summer generation ; 10, wingless 

 female of 9 ; natural size, three and a half millimeters long, n, Biorhiza aptera, wingless, asexual. 

 winter generation ; 12, larva of 11, seven millimeters long; 13, pupa of n, four to six millimeters 

 long; 14, galls of 11 on the roots of the oak, one cut to show larval chambers, natural size, ten 

 to twenty millimeters ; 15, gall of 10 on leaf buds of oak, cut to show larval chambers, natural 

 up to tour centimeters. 16, Trigonaspis crustalis, galls of sexual, summer generation on under 

 surface of oak leaf. 17, Biorhiza renum, winter generation of 16, galls on the bark of tin- oak. 

 (Photographed from a Leuckart-Niische wall chart by the author; permission of Dr. C. Chun.) 



