Insects, 5055 



this germs sufficiently proves the variableness of the insects. I be- 

 lieve that any ordinary series of examples in our cabinets will con- 

 tain individuals connecting together his species, and that the genus 

 will stand as above. 



Genus Philhydrus. 



1. P. lividus, For st. 



2. P. melanocephalus, Oliv. 



3. P. marginellus, Fab. All of these insects are tolerably abun- 

 dant. 



Genus Ch^etarthria. 



1. C. seminulum, Payk. Certainly rare. Stephens gives as loca- 

 lities Norfolk, Suffolk, Wimbleton Common. 



Genus Cyclonotum. 



1. C. orbiculare, Fab. Common, at roots of herbage, in damp 

 localities ; under planks, &c. 



Genus Speleridium. 



1. S. Scarabaeoides, Linn. 



2. S. bipustulatum. Fab. 



Although the habits of this and the following genera, comprising 

 the Geophilidae of Mulsant, are totally different from those of the 

 insects which we have been considering, I introduce them here, as 

 completing the group Palpicornes. I intentionally omit, with regard 

 to this group of insects, notices of localities : the species have up to 

 the present time been so little examined that any such notices 

 would probably rather mislead than direct. I rejoice to remember 

 that now entomologists think the group not unworthy of attention ; 

 so that we may hope to obtain some accurate knowledge of the 

 respective range of each species throughout our islands. The specific 

 distinctions of these insects have been very carefully studied by Mr. 

 Murray and Mr. Waterhouse. The former has published in the 

 'Annals of Natural History' a valuable paper, pointing out their 

 relative differences of structure (Vol. xii. No. 68, Aug. 1853) ; and 

 Mr. Waterhouse has kindly furnished me with a complete and care- 

 fully drawn up MS. list of their synonymy, as adopted by the princi- 

 pal authors of the Continent and Great Britain. 



