A HISTORY OF DURHAM 



Pachyrrhina cornicina, L. Tipula truncorum, Mg. Tipula vittat.i, Mg. 



guestfalica, Westh. hortensis, Mg. gigantea, Schrk. 



analis, Schm. varipennis, Mg. lutescens, F. 



quadrifaria, Mg. scripta, Mg. oleracea, L. 



lunulicornis, Schm. plumbea, F. paludosa, Mg. 



annulicornis, Mg. lunata, L. fascipennis, Mg. 

 Tipula pagana, Mg. lateralis, Mg. peliostigma, Schum. 



- confusa, V. de Wulp vernalis, Mg. ochracea, Mg. 



longicornis, Schm. 



RHYPHIDjE 



Rhyphus fenestralis, Scop. Rhyphus punctatus, F. 



STRATIOMYID^E 



The Soldier-flies are not largely represented in this county. None of the three first sub- 

 families have as yet been observed, and of the rest only S. cuprarius and irridatus and 



B. chalybeata are common. 



Chrysonotus bipunctatus, Scop. Sargus iridatus, Scop. Beris vallata, Forst. 



Sargus flavipes, Mg. Microchrysa polita, L. chalybeata, Forst. 



cnprarius, L. flavicornis, Mg. geniculata, Curt. 



Of the next five families only the Cleg is common among the Tabamdtt, although 



C. c&cutiens is sometimes fairly plentiful. All the Leptidts are common, except L. lineola and 

 5. crassicornit. D. rufipes, among the Asilidte, is generally distributed and very common along 

 the banks of the Gaunless. Philonicus is only found on the sand hills near Hart. Our only 

 Bee-fly is common in April where primroses abound, and the two Therevidte are fairly 

 abundant among the Bent grass on the coast. 



Hsematopota pluvialis, L. Therioplectes solstialis, Mg. Chrysopscoecutiens, L. 

 Therioplectes montanus, Mg. Tabanus autumnalis, L. 



LEPTID^E 



Leptis scolopacea, L. Leptis conspicua, Mg. Chrysopilus auratus, F. 



tringaria, L. lineola, F. Symphoromyia crassicornis 



ASILID./E 



Dioctria rufipes, Deg. Philonicus albiceps, Mg. Dismachus trigonus, Mg. 



BOMBYLID^ 



Bombylius major, L, 



THEREVID^: 



Thereva nobilitata, F. Thereva annulata, F. 



EMPID.E 



Several species of these two-winged robbers are among our commonest flies. They may 



often be seen with their long snipe-like beaks buried deeply in the body of some unfortunate 

 victim. Most of them are generally distributed, but Chersodromia is confined to the shore 

 rocks, while Clinocera and Ardoptera have only as yet been found in the upper dales. 



Hybos grossipes, L. Empis borealis, L. Hilara chorica, Fin. 



femoratus, Mull. stercorea, L. thoracica, Mcq. 

 Cyrtoma spuria, Fin. trigramma, Mg. CEdalia holmgreni, Ztt. 

 Rhamphomyia nigripes, F. punctata, Mg. Oxydromia glabricula, Fin. 



sulcata, Fin. pennipes, L. Clinocera fontinalis, Hal. 



dentipes, Ztt. vernalis, Mg. - bistigma, Curt. 



- variabilis, Fin. vitripennis, Mg. Ardoptera irrorata, Fin. 



- umbripennis, Mg. - chioptera, Fin. Chersodromia arenaria, Hal. 



- flava, Fin. Hilara maura, F. Tachydromia flavipes, F. 

 Empis tessellata, F. manicata, Mg. - cursitans, F. 



-- livida, L. - quadrivittata, Mg. - bicolor, F. 



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