22 MISCELLANEOUS STUDIES 



5. Cornicles pale. Wings with greater portion cloudy (fig. 262). Antennae with 



only tips of III to VI dusky. On Quercus spp discolor (Monell) 



Cornicles pale with apex dusky. Wings with dusky band along costal margin 



(fig. 263). Antennae with tips of III and IV, apical one-half of V, and 

 all of VI and spur dusky. On Quercus spp bellus (Walsh) 



6. Abdomen with four spine-like tubercles on the dorsum of the first segment. 



VI with base and spur subequal, III being considerably longer than both. 

 Cornicles pale, small, and inconspicuous. On Ulmus spp. 



ulmifolii (Monell) 

 - Abdomen without tubercles as above 7 



7. Ill shorter than VI (base and spur). On Quercus spp punctatus (Monell) 



Ill not shorter than VI (base and spur) 8 



8. VI with spur about twice as long as base (fig. 44). Cornicles pale. On 



Corylus spp coryli (Goetze) 



VI with spur at most only slightly longer than base 9 



9. Ill with apex only dusky (figs. 57, 58). Cauda pale 10 



- Ill dusky throughout (fig. 268) or with apex and a band near the base dusky 



(fig. 48). Cauda dusky 11 



10. Cornicles pale. Antennae longer than body. Sensoria on III (two or three 



in number) small and located close to the base of the segment (fig. 57), On 

 Pasania spp pasaniae Dvdn. 



Cornicles dusky, at least apical one-half. Antennae not longer than the body. 



Sensoria on III (five or more in number) fairly large and on basal two- 

 thirds of segment (fig. 58). On Quercus spp quercus (Kalt.) 



11. Abdomen with dusky dorsal markings. Ill dusky throughout (fig. 268). On 



Arundo spp arundinariae Essig 



Abdomen without dusky dorsal markings. Ill with apex and band near base 



dusky (fig. 48). On Arundo spp arundicolens (Clarke) 



11. Myzocallis alnjfoliae (Fitch) 



Figure 47 



Fitch, Cat. Homop. N. Y., p. 67, 1851. Lachnus (orig. desc.). 

 Essig, Pom. Jour. Ent., vol. 4, p. 764 (762), 1912. M. alni (Fabr.) (desc. 



viviparae). 



Baker, Jour. Econ. Ent., vol. 10, p. 421, 1917 (note). 

 Records. Alnus rhombifolia; Santa Paula (Essig). 



Only once has this species been taken in California, by Essig in 

 August, 1911, near Santa Paula, Ventura County. At that time it 

 was very abundant on the under side of the leaves, causing a large 

 amount of sooty mold. 



32. Myzocallis arundicolens (Clarke) 



Figures 22, 48, 51, 52 



Clarke, Can. Ent., vol. 35, p. 249, 1903. Callipterus (orig. desc.). 

 Davidson, Jour. Econ. Ent., vol. 2, p. 301, 1909. Callipterus (list). 

 Davidson, Jour. Econ. Ent., vol. 3, p. 376, 1910. Callipterus (list). 

 Essig, Pom. Jour. Ent., vol. 4, p. 762, 1912 (list, in part). 

 Essig, Univ. Calif. Publ. Entom., vol. 1, p. 305, 1917 (desc.). 



H 



