ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



VOL. XXXI. 



MARCH. 1920. 



No 3. 



CONTENTS 



McAtee Specific, Subspecific and Vari- 

 etal Categories of Insects and the 

 Naming of Them (concl.) 61 



Cresson Descriptions of New North 

 American Acalyptrate Diptera II. 

 (Trypetidae, Sapromyzidae) 65 



Weiss Mordella marginata Melsh., 



Bred from Fungus (Coleop.) 67 



Crawford Notes on Psyllidae (Homop- 

 tera) 69 



Alexander Undescribed Tipulidae Col- 

 lected by Mr. H. S. Parish in Brazil 

 (Dipt.).. ... 70 



Braun New Species of Lyonetiidae 



(Microlepidoptera) 76 



Smith The Bembicine Wasps of North 



Carolina (Hym.) 80 



Editorial A Fifty Years' Editorship 



and Arthropods 83; 



Williams Pseudagenia capella nom. 



nov. (Hym., Psammocharidae) . . . . 84 



Entomological Literature 84 



Obituary George Macloskie 8f> 



Jordan Seitz: Palaearctic Geometri- 



dae 90 



Specific, Subspecific and Varietal Categories of 

 Insects and the Naming of them. 



By W. L. McAxEE, U. S. Biological Survey, Washington, D. C. 



(Continued from page 55). 



In naming taxonomic conceptions subordinate to the spec- 

 ies it is important to bear in mind that they may not perma- 

 nently be regarded of the same rank as that in which originally 

 described. Thus a form first designated as a species may 

 later be shown to be a subspecies ; a variety may be found to 

 be a subspecies, or a form assigned to either of these cate- 

 gories may later be given specific rank*. Precautions should 



*The frequency of this occurrence should help students to realize to 

 what an extent taxonomy deals with concepts rather than entities, that 

 while the things may not change in measurable time, concepts of them 

 certainly do, and that the present phase of the concepts is no more to be 

 seriously accepted as fixed than were the half-century or century oltl vicu s 

 now discarded. Certainly a present change in an admittedly ever-chang- 

 ing concept should not inspire deep umbrage, especially as in the last 



61 



