PLANT LOUSE PARASITES I 



(Fam. Braconidae, Subfamily Aphidiinae.) 



C. F. BAKER 



Various rearings of these very beneficial insects in California, together with 

 ample series taken in general collecting has made it necessary to work up our 

 material and indicate the new forms. A table of all the genera, adapted from 

 Ashmead and Szepligeti, is given here to guide western students. 



A. Abdomen round, the oviduct curved beneath it. 



B. First cubital and first discoidal cells confluent. Monoctonus Hal. 



BB. First cubital and first discoidal cells separated. Toxares Westw. 



A A. Abdomen lanceolate; oviduct not curved beneath it. 



B. Wings with three cubital cells. Ephedrus Hal. 



BB. Wings with less than three cubitals. 

 C. First cubital and first discoidal cells separated. Praon Hal. 



CC. First cubital and first discoidal cells confluent or wanting. 

 D. Discoido-cubital cell closed. 



E. Metanotum much humped. Coelonotus Forst. 



EE. Metanotum not much humped. 



F. Radius much elongated, enclosing more than two-thirds 



of the radial area. Acliius Forst. 



FF. Radius shortened, enclosing hardly one-third of the 



radial area. Aphidius Nees 



DD. Discoido-cubital cell open. 



E. Radius wholly wanting. Paralipsis Forst. 



EE. Radius at least in large part, distinctly present. 



F. With a transverse cubital vein. Lysiphlebus Forst. 



FF. Without transverse cubital veins. 



G. Head longer than broad, strongly widened behind eyes. 



Dyscritus Marshall 

 GG. Head transverse. 



H. Second discoidal cell present. Diaeretus Foist. 



HH. Second discoidal cell wanting. 



I. Metanotum not areolated. Adialytus Forst. 



II. Metanotum areolated. 



J. Radius reaching four- fifths of radial cell. 



Lipolexis Forst. 

 JJ Radius not reaching four-fifths of radial cell. 



Trioxys Hal. 



