i86 



CHAPTER II 



It should also be mentioned that, according to specimens preserved at the Bristol 

 Museum, the ground-beetles Clivma collaris Hbst. and fossor L. have been taken 

 on the Avon banks. Both of them are European introductions into North America 

 but they were not found by rne on the investigated ballast-places. 



In the fauna of the investigated, stated or supposed, ballast-places, the importance 

 of species which have been carried over to North America, is quite obvious. Within 

 the specially considered groups {Carahid and Curculionid beetles, Dermaptera, Op- 

 ilionida, " Iso-Myriapoda" , and Mollusca), the said element amounts to between 

 43 and 75 per cent of the species on waste ground. On pure sand and on saline 

 localities it is less pronounced or even absent. 



Lists of animals collected on the ballast-places in SW England 



Genera and species in alphabetical order. — Locality numbers as given above 

 (p. 173 a.f.). — Abundance recorded for common species, (c), only, 

 f = occurring in North America, ff = in Newfoundland, and regarded as introduced. 

 *= ,, ,, ,, ,, ** = ,, ,, , and regarded as indigenous. 



These symbols are placed in brackets in case only old records from North America 

 (not later than Leng, 1920) are available. 



Coleoptera 



Carabidae 

 83 species vide table 5 (p. 193). 



Hydrophilidae 

 Helophorus brevipalpis Bed. Vc. 

 t Megasterniim boletophagum Mrsh. 

 Vb. 



Ochthebius impressicollis Cast. (det. 

 V. Hansen) Vc. 



O. marimis Payk. (det. V. Hansen) 

 Vc 

 ft Sphaeridium scarabaeoides L. Va. 



Silphidae 

 Ablattaria laevigata F. Via, VII. 

 Silpha tristis 111. Va, b. Via. 



Staphylinidae 

 t Aleochara bipustidata L. la. 



tt Amischa analis Gr. Vb, Via. 



A. decipiens Sharp lb, V b, VII. 



Astenus longelytratus Palm {angus- 



tatus auctt., nee Payk.) lb. 



Astilbus canalicidatus F. Vc, Via, 



VII, VIII. 



Atheta (Dinaraea) angustida Gyll. 



(contr. L. Brundin) Vb. 



A. {Dimetrota) atramentaria Gyll. la. 



A. (Acrotona, "Oxypoda") exigiia 



Er. la. 

 (*) A. {Acrotona) fungi Gr. la, Vb, VII. 



A. {s. str.) oblita Er. (det. L. Brun- 

 din) lb. 

 (t) A. {Acrotona) orbata Er. (contr. L. 



Brundin) Va. 



A. {s. str.) triangultim Kr. (contr. L. 



Brundin) Va. 



A. {Thinobaena) vestita Gr. Ic (c), 



VIII (c). 



