228 . On the connecting Links between 



I would now make a few concluding observations. Howit, 

 in his Boole of the Seasons, p. 1 64., says : " Of the twenty-five 

 species of Papiliones enumerated in the list of this month, eight 

 only are known to inhabit this county." Out of these twenty- 

 five, I find but eleven in my list, In comparing the above list 

 with the lists of Papilionidae occurring in the vicinity of 

 Dover (Vol. V. p. 330.) I find, that, whilst my list counts but 

 thirty-five, the Dover list reckons forty-six. In the Dover 

 list I find fifteen species not included in mine; whilst mine ex- 

 hibits ten species not included in the Dover list. Mr. Bree, 

 however, as an experienced entomologist, and assisted by an 

 assiduous collector, had decidedly the advantage over me, 

 an unassisted and inexperienced tyro : I therefore think that it 

 is very possible, nay, very probable, that my neighbourhood 

 will, upon closer investigation, furnish some additions to the 

 above list. Standing in one given point, and from thence 

 describing a circle whose diameter shall be about one mile, 

 within that circle I have captured specimens of every fly which 

 I have enumerated, with the exception of Argynnis Aglai« 

 and Argynnis Adipp^. 



February 21. 1833. C.Conway. 



P. S. — I have already seen Gonepteryx rhamni and Va- 

 nessa urticae. Of the former, several were seen sporting in 

 the sunshine on the 7th ; of the latter, one solitary instance on 

 the 9th.— C. C. 



Art. X. On the connecting Links between the Geocorisce and Hy- 

 drocorisce of Latreille, or the Land and Water Bug Tribes. By 

 J. O. West wood, F.L.S. &c. 



If the investigation of the habits, characters, and struc- 

 tures of those creatures amongst the higher ranks of the 

 creation, which establish a passage between the inhabitants of 

 different elements, be deemed highly interesting, no one will 

 deny that the same interest ought to attach, in a philosophical 

 point of view, to those animals in the inferior ranks of nature 

 which can be proved to possess a similar claim to our notice. 

 It appears to me that such is the case with the following insects, 

 which seem most satisfactorily to form the transition from the 

 land to the water Cimicidae, or bug tribes. In fine weather, 

 a small lively cimicideous insect may often be observed run- 

 ning about the margins of ponds, streams, &c, of a black 

 colour, with paler spots on the wing cases, and of a nearly 

 rounded flattened form. This insect is the Acanthia saltatoria ; 



