72 MISCELLANEOUS STUDIES 



KEY TO THE CALIFORNIA SPECIES 

 Alate viviparous females 



1. Secondary sensoria present on III only 5 



- Secondary sensoria present on other segments as well as on III 2 



2. Secondary sensoria on III, IV, and V 3 



- Secondary sensoria on III and IV, none on V fragaefolii Cockerell 



3. Cornicles dusky for entire length cynosbati (Oestlund) 



Cornicles mostly pale 4 



4. Thoracic lobes distinctly darker than general body color, being black or dark 



brown aquilegia Essig 



Thoracic lobes at most only slightly darker than body, being a pale brown. 



braggli Gillette 



5. Body black throughout cerasi (Fabricius) 



Body not black throughout 6 



6. Cornicles pale except at extreme tip 7 



Cornicles with more than tip dusky 8 



7. VI spur longer than III, the latter with but 9 to 12 sensoria. 



varians Davidson 



VI spur at most equal to III, the latter with 18 to 26 sensoria. 



lycopersici (Clarke) 



8. Cornicles longer than either IV or V 10 



Cornicles not longer than either IV or V 9 



9. VI spur longer than II circumflexum (Buckton; 



VI spur shorter than III rlbifolii Davidson 



10. Ill with 15 to 25 sensoria (fig. 178) rhamni (Fonsc.) 



- Ill with but 9 to 12 sensoria varians Davidson 



Apterous viviparous female 



1. Body covered with capitate hairs 2 



Body not covered with capitate hairs except on head and antennae 5 



2. Secondary sensoria on III 3 



No secondary sensoria on III 4 



3. Cornicles dusky ribifolii Davidson 



Cornicles pale except tip aquilegiae Essig 



4. Cornicles almost twice as long as III. Body fairly large sized. 



braggii Gillette 



Cornicles but slightly longer than III. Body small sized. 



fragaefolii Cockerell 



5. Secondary sensoria on III 6 



No secondary sensoria on III 7 



6. VI spur longer than III. Several sensoria scattered along the whole length 



of III cynosbati (Oestlund ) 



VI spur at most equal to III. Only a few (1-3) sensoria at base of III. 



lycopersici (Clarke) 



7. Ill longer than cornicles. Dorsum of abdomen with dusky markings, shaped 



somewhat as a horseshoe circumflexum (Buckton) 



Ill at most equal to cornicles. Abdomen not marked as above 8 



8. Body black throughout cerasi (Fabricius) 



Body not black throughout 9 



9. VI spur almost twice as long as III varians Davidson 



VI spur but slightly longer than III rhamni (Fonsc.) 



