GENUS BHODITES. 37 



14 (13) Only the mesonotum polished ; pronotum without foveas. 



15 (18) Cheeks at least half as long as the eyes ; the radial cellule not 



usually elongated ; abdomen not petiolate. 



16 (17) Claws bifid ; mesonotum shining, impunctate ; antennae 14- 



jointed. Diastrojohus. 



17 (16) Claws simple; mesonotum shagreened, opaque; antennas 14 — 



15-jointed. Aulax. 



18 (15) The cheeks less than one-half longer than the eyes; radial 



cellule open, longish, narrow. 



19 (20) Keels of mesonotum straight and parallel or very short ; 



antennae 14 — 15-jointed; parapsidal furrows complete, deep; 



two distinctly separated fovese at base of scutellum ; abdomen 



scarcely petiolated. Andricus, 



20(19) Keels of median segment hardly curved ; antennas 15-jointed. 



21 (22) Reddish-yellow; antennas thick, third joint longer than 



fourth ; strongly emarginated ; mesonotum shining ; claws 

 simple ; abdomen scarcely petiolated. Biorhiza. 



22 (21) Mesonotum not reddish-yellow ; the antennas thin, the third 



joint emarginate ; abdomen petiolated ; claws bifid. 



Dryophanta. 



Obs. — The male of Cynips is unknown. 



Genus Rhodites. 



Bhodites, Hartig, Germs. Zeit., ii, 186 ; Mayr, Genera, 18. 

 Hololexis, Foerster, Yerh. z.-b. Ges. Wien, 1869, 330. 



Apical ventral segment elongate, ploughshare- shaped, ending in a 

 sharp point. Antennas 14 — 15-jointed, situated above the middle of 

 the face ; the flagellum filiform, its first joint longer than the second. 

 Radial cellule completely closed, short, the areolet when present 

 placed close to its base. Cheeks without furrows, as long or nearly as 

 long as the space from the bottom of the eyes to the top. Head not 

 dilated behind the eyes. Parapsidal furrows complete, or obliterated 

 in front. Scutellum large, bifoveate or not at the base. Mesopleuras 

 with a longitudinal furrow extending from the fore to the middle 

 cox33 (except with the American B. dichloceros, O. S.), the furrow 

 rugosely punctured. 



The <$ has the third antennal joint curved, and is very rare, the 

 genus, in fact, being more or less parthenogenetic. The areolet is 

 present or absent ; and the wings are more or less infuscated, seldom 

 clear hyaline. The head and thorax are black, but the abdomen is 

 frequently yellowish. 



Without exception the species are found as gall- 

 makers on roses. Six or seven species are known 

 from Europe, and about the same number from North 

 America. 



Bhodites is a very easily recognised genus ; the 



