98 HOMOLOGIES OF CERTAIN 



Tormentil {Potentilla Tormentilla). 



Devil's-bit Scabious {Scabiosa Succisa). 



Dandelion {Taraxacum officinale). 



Rough and Autumnal Hawkbit {Leontodon hispidus and L. 



autumnalis). 

 Umbellate Hawkweed {Hieraciuni umbellatum). 

 Golden Rod {Solidago Virgaurea). 

 Long-rooted Cat's-ear {Hypochccris radicata). 

 Milfoil or Yarrow {Achillea Millefolium). 

 Black Knapweed (Centaurea nigra). 

 Common Ragwort {Senecio Jacohcea). 

 Harebell {Campanula rotundifolia). 

 Common Ling {Calluna vulgaris). 

 Fine-leaved and Cross-leaved Heath (Erica cinerea and E. 



Tetralix). 

 Common Hemp-Nettle {Galeopsis Tetrahit). 

 Wood Germander {Teucrium Scorodojiia). 

 Wood Betony {Stachys Betonica). 



®n tbe Ibomologiee of (Tcrtaln parts of 



3n6ect0» 



By a. Hammond. 



I REGARD the microscope but as a means to an end, and if its 

 use (as has been the case) has led me to form opinions on sub- 

 jects extending beyond its range, I hope that the same extension 

 of grasp may be found amongst those whose first love has com- 

 menced in a manner so similar to my own, and that they, too, 

 commencing with the infinitely litde, may find an interest in a 

 subject which I cannot but feel, if my speculations are worth any- 

 thing at all, embraces the structural relations of every member of 

 the insect world. 



The discussion of theoretical questions by one whose opportu- 

 nities of acquiring general information have been so limited, or 

 perhaps so little used, as my own may savour somewhat of pre- 

 sumption, and I know not certainly how far the same ideas may 

 have occurred to others before me, and may consequently have 



