Explanation of Plate XVII. 
Fig. i. Acanthocallis quercicola Mats. (n. sp.) p. 368 
1 a, Wingless viviparous ^ . 
I b, Antenna of winged viviparous <j> . 
1 c, Empodial hair. 
1 d, Cornicle. 
Fig. 2. Hannabura alnicola Mats. (n. sp.) p. 377 
2 a, Antenna of winged viviparous $ . 
2 b, Empodial hair. 
2 c, Cornicle. 
2 d, Capitate hair. 
Fig. 3. Ariinakia araliae Mats. (n. sp.) p. 405 
3 a, Wingless viviparous ^ . 
3 b, Cornicle of wingless viviparous ^ . 
3 c, Antenna of winged viviparous Q . 
Fig. 4. Toxoptera piricola Mats. (n. sp.) p. 414 
4 a, Antenna of winged viviparous °. . 
4 b, Cornicle. 
Fig. 5. Arakawana stigmata Mats. (ft. sp.) p. 375 
5 a, Antenna of winged viviparous $ . 
5 b, Cornicle. 
Fig. 6. Nippolachnus piri Mats. (n. sp.) p. 382 
6 a, Wingless £ . 
6 b, Antenna of winged viviparous °. . 
6 c, Cornicle. 
Fig- 7- Todolachnus abietis Mats. (n. sp.) p. 381 
7 a, Nymph. 
7 b, Antenna of winged viviparous ^ . 
7 c. Cornicle. 
Fig. 8. Nippocallis kuricola Mats. (n. sp.) p. 365 
8 a, Nymph. 
8 b, Antenna of winged viviparous 0 . 
8 c, Cornicle. 
