80 ANDRIOUS GLOBULI. 



gall of this species under the name of gemmae ; but it 

 is not equally clear that he has described the insect. 

 His short description — " Grisea sen testacea, oculifusci, 

 antennae subfuscae, longitudine corporis" — may refer to 

 a Synergus. 



Sexual Form. — Black, shining ; the scape of the .antennae brown ; 

 joints 2 — 5 yellowish-testaceous, the rest fuscous ; the legs yellowish- 

 testaceous, the anterior femora at the base, the posterior except at the 

 base and apex, infuscated ; the coxae black at the base. Face aciculate, 

 the pronotum finely punctured, the scutellum rugose. Wings hyaline, 

 the nervures fuscous-black. Abdomen dull black, the ventral surface 

 brownish. Head not dilated behind, and frequently castaneous or 

 brownish. 



The c? has the antennae darker, the basal joints black ; joints 2 — 3 

 dark yellow ; the rest brownish; paler beneath ; the apex of the femora, 

 tibiae, and tarsi pallid yellow. Scutellum shagreened ; the fore- coxae 

 at the base are brownish, the middle and hinder are for the greater 

 part black ; the third antennal joint only slightly curved, narrowed at 

 the base. 



Length 1*5 mm. 



Gall. — Found in the $ catkins in May. Length 

 2 mm., oval, narrowed a little towards the apex, some- 

 times as broad there as at the base ; dull green when 

 young, brown when old, covered thickly with long 

 white hair; the surface rough. The gall is usually 

 found singly, but three or more may be occasionally 

 be placed close together. (See A. amenti.) 



Commonly distributed in Britain. 



Continental distribution : Sweden, Germany, Aus- 

 tria, Switzerland, France. 



4. ANDRIOUS GLOBULI. 



PI. IV, figs. 1 (globuli) and 1 a (inflator) ; galls. 



Cynips globuli, Htg., Germs. Zeits., iii, 336 ; Schenck, Nass. 



Oyn., 54, 59, and 114; Kirchner, Cat., 23. 



Aphilothrix globuli, Mayr, Eichengallen, 24, pi. iv, fig. 30; 



Adler, Zeits. wiss. Zool., xxxv, 174, 



pi. x, fig. 8 ; Licht. Cyn., 32, pi. i, fig. 8; 



Fitch, Essex Field Club, ii, 136, fig. 25. 



Andricus globuli, Mayr, Europ. Cyn., 23. 



— inflator, Htg., Germs. Zeits., ii, 191 ; Schenck, Nass. 

 Cyn., 74, 75, 76, and 119; Mayr, Eichen- 

 gallen, 29, pi. iv, figs. 38 and 38 a ; Europ. 



