Mr. F. Walker on the Mymaridae. 53 



signed to the above species do not seem to him to be quite satis- 

 factory, and that all excepting the 5th and the 6th may be one 

 species. There seem to me to be two forms of P. flavipes, which 

 however can hardly be divided into two species, for there is a gra- 

 dual transition from one of these forms to the other ; the one has 

 the legs all yellow, and it is more slender than the other, which has 

 shorter and thicker antennae, and brown hind tibiae. This last va- 

 riety approaches P. fuscipes, which has the base of the antennae, the 

 thighs and the tibiae black, and the podeon dark fuscous. P.fumi- 

 pennis is rather more slender than P. flavipes, and it is also distin- 

 guished by its more downy and more deeply fringed wings. 



Judging by the figure of Eutriche gracilis, Nees, in Foerster's Mon. 

 Pteromal. fig. 17, it does not seem to differ from P. euchariformis. 

 I will here translate Foerster's description of this and of two other 

 species : — 



1. Eut. gracilis, Nees. The male has brown antennae, 14-jointed, 

 yellow at the base which is thick; the joints are slender and cylin- 

 drical. 



2. Eut. elegans, Foerster. Black, shining : the antennae brown, 

 yellow at the base : the legs brownish, excepting the tips of the hind 

 coxae, the base and the tips of the thighs and tibiae, and the tarsi, 

 which are yellow ; the last tarsal joint is brownish : the podeon of 

 the abdomen is shorter than that of E. gracilis : the sheaths of the 

 oviduct are black, and equal one-third of the length of the body. 

 Fern, length f lin. 



3. Eut. amcena, Foerster. Black, shining : the antennae brown : 

 the base of the antennae, the legs with the coxae, and the podeon of 

 the abdomen are reddish yellow : the podeon is half the length of 

 the body ; the first abdominal segment is excavated, and projecting 

 on each side : the head is very finely punctured : the mesothorax 

 and the scutellum are strongly and distinctly punctured : the meta- 

 thorax is very strongly punctured. Male, length \ lin. 



Mr. Haliday observes that Gonatocerus longicornis (Nees, Hym. 

 Ich. aff. Mon. ii. 193) is of this family, but of a different genus from 

 any here described, if the description of the antennae is correct. I 

 have here translated Foerster's descriptions (Mon. Pterom. i. 45) of 

 five other species of this genus : — 



2. Gon. ater, Foerster. Black, shining : the antennae are brown, 

 yellow at the base : the legs are blackish brown ; the knees, the 

 tips of the tibiae, and the tarsi, are yellow ; the fore tibiae are quite 

 yellow. Male and female, length f lin. 



3. Gon. flavus, Foerster. Yellow : the antennae, except at the 

 base, a spot with two little accompanying spots on the prothorax, 

 the middle of the scutellum, the metathorax, and the abdomen from 

 the middle to the tip, are brown. Fern, length \ lin. 



4. Gon. flavipes, Foerster. Black, shining : the base of the an- 

 tennae and the legs are yellow. Fem. length \ lin. 



5. Gon. parvus, Foerster. Black, shining ; the antennae are brown ; 

 their base, the mouth and the legs are dirty yellow. Male and fem. 

 length -£- lin. 



