54 



BR. J. ENT. NAT. HIST., 7: 1994 



Table 1 . Mean linear dimensions of adult grasshoppers collected on Langness Peninsula in July 

 1990 (all measurements in mm, with standard deviation in parentheses). 



Species 



Sex 



n 



Head 



Pronotum 



Fore-wing 



Hind-femur 



Body 



M. maculatus 



M 



5 



1.96 (0.16) 



2.16 (0.15) 



8.33 (0.66) 



7.20 (0.54) 



12.45 (0.94) 





F 



14 



2.28 (0.11) 



2.50 (0.12) 



10.14 (0.48) 



8.37 (0.42) 



14.92 (0.57) 



S. stigmaticus 



M 



12 



1.91 (0.21) 



2.20 (0.12) 



6.76 (0.28) 



7.37 (0.48) 



10.88 (0.41) 





F 



14 



2.39 (0.11) 



2.88 (0.14) 



8.24 (0.62) 



9.11 (0.60) 



13.51 (0.71) 



C. brunneus 



M 



12 



2.22 (0.19) 



2.17 (0.21) 



12.54 (0.41) 



9.29 (9.55) 



17.46 (0.64) 





F 



11 



3.07 (0.24) 



3.62 (0.17) 



15.77 (0.78) 



12.20 (0.65) 



22.46 (0.90) 



former agricultural land (now reverting to rough grassland) and extensive areas of 

 unimproved vegetation (Garrad, 1972; Allen, 1984). The latter include maritime 

 grassland and heath. In addition to supporting a diversity of invertebrates (Luff, 

 1990), these plant communities are of some conservation value in their own right. 



500 m 



Fig. 1. Map of Langness Peninsula, showing the distribution of S. stigmaticus in July 1990 

 (hatched areas), the golf course (stippled areas) and other features mentioned in the text: 

 1 Ronaldsway airport; 2 Derby Haven; 3 Sandwick; 4 Kiln and Smelt House (ruins); 5 Hotel; 

 6 Langness Farm O^uins); 7 car park (open symbol), earthwork (broken line) and Powder House 

 (filled circle); 8 Herring Tower; 9 Lighthouse; 10 The Arches; 11 Dreswick Point. 



