392 Mr. J. Walton on the genus Apion. 



advanced period. The nucleus therefore is not an organ neces- 

 sarily dependent (at least in its earlier stages) on the membranes 

 which surround it, nor developed subsequently to them, as would 

 seem to be implied in the account given of M. Brongniart^s opi- 

 nion, translated from the ^Comptes Rendus^ (March 1844), and 

 published in a late Number of the ' Annals and Magazine of Na- 

 tural History.^ 



LVI. — Notes on the Synonymy of the Genus Apion, with De- 

 scriptions of Six new Species, ^c. By John Walton, Esq., 

 F.L.S. 



[Continued from p. 342.] 



57. A. difformCf Germ., Curt., Steph., Schonh. 

 — compressicorne, Dej. Cat. 



The anomalous structure of the antennae and the parts of the 

 legs, which eminently distinguishes the male of this species, is 

 entirely sexual. The female differs in having the rostrum slender 

 and longer ; the antennae simple, inserted behind the middle of 

 the rostrum, entirely black ; the legs slender ; the basal joint of 

 the anterior tarsi short and not produced at the apex, the poste- 

 rior tibiae and tarsi much less dilated at their apices ; all the tro- 

 chanters, the tibiae and tarsi of a deep black ; the epigastrium 

 simple. The male was originally described by Germar from a 

 specimen sent to him by the late Mr. Haworth; subsequently 

 Mr. Curtis figured and also described the male ; I succeeded in 

 capturing a great number of both sexes in October 1837, which 

 gave me an opportunity to identify distinctly the female. The 

 female has frequently been mistaken for Ap. Trifolii of Linnaeus 

 {Ap. cBstivum of Germar), but it is instantly distinguished from 

 that species by having, independently of other characters, the an- 

 terior coxae and trochanters always densely black. 



This curious species was formerly considered to be very rare, 

 yet of late years it has been found in abundance in many loca- 

 lities in the south of England, but not in the north to my know- 

 ledge ; I found a great number of both sexes near Mickleham in 

 Surrey the 1st of October 1837, and again at Hastings in Sep- 

 tember on the Polygonum Hydropiper abundantly. '' Common 

 near Brighton, Arundel, Birch Wood, and other places in the 

 autumn,^^ Mr. S. Stevens. 



58. A. dissimilcy Germ., Schonh. 



Black and shining. Head very broad, the frons posteriorly 

 flat, rugose or rugose-punctate, between the eyes more or less 

 deeply excavated, the excavation with one or more irregular curved 

 ridge or ridges ; eyes very prominent ; rostrum moderately long, 



