Monograph, on the Sijncrfji of the Oal'-galh 



275 



Third joint of the antennre twice as long as the 



fourth. Hctimi. 



Third joint of tlie antennae not twice as long as the 



fourth. undulatus. 



CEROPTEES. 



A. Face with two acute longitudinal keels. arator. 



B. Face with two obtuse and sometimes indistinct longitu- 



dinal keels. Cerri. 



List of the Flies avhose Galls are inhabited by the 

 PRECEDING Species. 



1. Synergus melanopus. 

 Cynips argentea. Cynips polycera. 



hungarica. „ caliciformis. 



tinctoria. „ amblycera. 



Kollari. „ caput-medusa\ 



lignicola. „ calicis. 

 conglomerata. A])hilothrix lucida. 



glutinosa. „ gemmse. 



coriaria. „ clementinfe. 



2. Synergus lieinhardi. 



Cynips argentea. Cynips caliciformis. 

 „ tinctoria. „ caput-medusoe. 



„ Kollari. „ calicis. 



glutinosa. 



3. Synergus evanescens. 



Cynips calicis. Aphilothrix gemma:'. 



Andricus niultiplicatus. 



4. Synergus pallidipennis. 

 Cynips tinctoria. Cynips coriaria. 



„ lignicola. „ conifica. 



5. Synergus flavipes. 

 Dryocosmus nracroptera. 



