270 



GUIDE TO CALIFORNIA INSECTS. 



flavocapitata VanD. 

 geminata VanD. 

 languida Ball, 

 limbata VanD. 

 lucida Bak. 

 luctuosa Stal. 



Aphrophora permutata Uhl. 

 Ciastoptera delicata Ball. 



dentata Gil. 

 Uhleriella coquilletti VanD. 



signata Ball. 



stygica Ball. 

 Xerophloea peltata Uhl. 



viridls Bak. 



CERCOPID/E. 



obtusa Say. 



APHINA. 



PSYLLID/E. 



Aphaiara pulcheiia Cfa. 



Fig-ure 247. Venation of a Psvllid. •■ 



APHID/E. 

 Plantlice are very important pests,but as a rule quite easy to control 

 Si^praying with an oil emulsion or nicotine solution. 



cratsegi Mon. 



diantlii — Rhopalosiphum. 



gossypi Glo. 



humuli — Phorodon. 



lutescensEss. 



maidis Fitch. 



mori Clarke. 



cenotherac' Oes. 



persicaeniger Sm. 



rosge — Nectarophora. 



rudbeckias Ess. 



sorbi Kalt. 

 Calaptiis caryse — CalJipterus. 

 Callipterus arundicolens Clarke. 



betulaecolens Fitch. 



caryae Mon. 



castanise Goetze. 



hyalinus Mon. 

 Chaitophorus viminalis Mon. 

 Cryptosiphum tahoense Dav. 

 Drepanosiphum acerifolii Thorn. 

 Eriosoma querci — Schizoneura. 



i3y 



Venation of an Aphid. 



Aphis alamedensis Clarke, 

 avense — Nectarophora. 

 betul^colens — Calypterus. 

 brassicae Linn, 

 calendulicola Mon. 

 ceanothi Clarke, 

 ceanothihirsuti Ess. 

 cerasi — Myzus. 

 cookii Ess. 



