176 The Insects of Cambridgeshire 



taken; Oxycera morrisii, Curt, and 0. trilineata, F., Nemotelus 

 tiiyrinns, Fin., and the commoner species N. pantherinus, L., 

 and N. uliginosus, L. all occur. Microchrysa flavicornis, Mg., 

 Beris vallata, Forst., and Xylomyia nnx.'ginata, Mg. have been 

 taken at Upware close to Wicken. 



All the commoner species of Tabanidae occur in the 

 district, but there is nothing else of note to mention until we 

 come to the Empidae, among which we find Cyrtoma melaena, 

 Hal., Rhamphomyia spissirostris, Fin., R. dissimilis, Ztt., R. 

 atrata, Mg., and R. umbripennis, Mg., Empis livida, L., E. tri- 

 gramma, Mg., E. punctata, Mg., E. cattdatula, Lw., and E. 

 aestiva, Lw., Trichina elongata, Hal., Hemerodromia precatoria, 

 Fin., Ardoptera irrorata, Fin., and A. guttata, Hal., Lcj>/'- 

 domyia melanocephala, F., Drapetis nervosa, Lw., and D. 

 pusilla, Lw., Tachypeza fuscipennis, Fin., and Chersodromia 

 speculifera, Walk., a little known species which however is 

 not uncommon in Chippenham Fen in heaps of cut sedge 

 in the winter and spring. 



In the next family Dolickopodidae we find a whole host of 

 species occurring in the Fen District, many of which had not 

 been recorded as British, or had been considered rare, until 

 collected there; among them may be mentioned: Psilopus 

 longulus, Fin., and P. contristans, W., Eutarsus aulicus, Mg., 

 Dolichopus nubilus, Mg., D. pennatus, Mg., D. urbanus, Mg., 

 D. longicornis, Stann., D. puncticornis, Ztt., D. linearis, Mg., 

 D. griseipennis, Stann., D. simplex, Mg., D. festivus, Hal., D. 

 trivialis, Hal., and D. brevipennis, Mg., Poecilobothrus nolnli- 

 tatus, L., Hercostomus chrysozygos, W., H. gracilis, Stann., H. 

 nigriplantis, Stann., H. plagiatus, Lw., and H. nanus, Mcq., 

 Hypophyllus discipes, Ahr., and H. obscurellus, Fin., Gynni"- 

 pternus metallicus, Stann., and G. assimilis, Staeg., Chrysotus 

 pulchellus, Kow., and C. microcerus, Kow., Argyra dinplnum, 

 F., A. confinis y Ztt., A. argentine/,, Mg., and A. httcocepkafa, 

 Mg., Leucostola vestita, W., Syntormon pumilm, Mg., and 8. 

 pallipes, F., Machaerium maritimae, Hal., Xii>lntn<lrnmi /> 

 pendiculatum, Ztt., and A". <'<iH<i/n<>xiun, Mg., AMrfi'rus <li<i 

 dema, L., M.flavipes, Mg., M. jaculd.*. .M-\, ,-m<l J/. trnm-i,rnni. 



