Mr. J. Walton on the Genus Apion. 455 



27. A. Carduorum, Kirb. (1808), Germ., Steph. 

 Cure. Sorbi, Marsh. 



A. gibbirostre, Gyll. (1813), Sclionh. 



— (var.) tumidum, Stejih. 



This insect has, near the base of the rostrum, two concavo- 

 convex plates or cups (one on each side), surrounding the outer 

 edges of two deep fovea?, and the antennre are inserted in the 

 concavities beneath ; the edges of the plates in front have a deep 

 excision to receive the antennre when extended forward ; the foveas 

 and the antennal grooves behind are separated by a prominent 

 narrow ridge or carina which terminates beneath between the 

 eyes : I have observed under the rostrum of Apion eeneum, and in 

 other species also, two deep fovese which are externally dilated, 

 and have the usual deep antennal grooves behind. 



Frequently found upon thistles {Carduus) the latter end of July 

 and the beginning of August. 



28. A. rufirostre, Fab., Herbst, Marsh., Kirb., Germ., Gyll., Steph., 



Schonh. 



— (?) tnalvarum, Kirb., Germ. 

 Czirc. TrifoUi, Marsh, not Linn. 



Found abundantly on the mallow {Malva sylvestris) in York- 

 shire and within the metropolitan district, the latter end of June 

 and the beginning of July. 



29. A. Malva, Fab., Marsh., Kirb., Germ., Steph., Schonh. 



Very plentiful on mallows {Malva sylvestris) at Birch and 

 Coombe Woods, Combhurst near Croydon, and at Gravcsend, in 

 Jmie and July. 



30. A. vernale, Fab., Herbst, Kirb., Gyll., Germ., Steph., Schonh. 

 Cure, eoneinnus, Marsh. 



I found this insect on the south side of Windmill Hill, Graves- 

 end, on the common stinging-nettle {Urtica dioica) in May, and 

 Mr. S. Stevens met with it in the same locality in October, and 

 also at Southend in June ; it appears to be very local and un- 

 common. 



31. A.pallipes, Kirb., Gyll., Germ., Steph., Schonh. 



— geniculatnm, Germ. 



This species is very sparingly clothed with scattered whitish 

 hairs, and all the coxcb are hlack ; the trochanters and ta7'si piceous 

 ov pitchy black; the antennae with the basal joints generally 

 piceous, and the club always dusky black. Germar has sent me 

 a foreign specimen of his Ap. geniculatum, which he says is the 

 pallipes of Kirby : no doubt can exist as to the correctness of this 

 opinion. 



