INSECTS 



DOLICHOPODIDiE 



Several of the genus Dolichopuf are very common. The first five are numerous in marshy 

 places in the dales ; trivia/is, tfneus, and G. teroius are common everywhere ; of the others, 

 only a few have been met with here and there. 



Psilopus platypterus, F. 

 Ncurigona quadrifasciata, F. 

 Dolichopus a tripes, Mg. 



- vitripennis, Mg. 



atratus, Mg. 



- picipes, Mg. 



plumipcs, Scop. 



pennatus, Mg. 



popular!*, W. 



Dolichopus urbanus, Mg. 



griseipennis, Stan. 



trivialis, Hal. 



brevipennis, Mg. 



xneus, Deg. 

 Hercostomus nigripennis, Fin. 

 Gymnopternus cupreus, Fin. 



zrosus, Fin. 

 Chiysotiu gramincus, Fin. 



LONCHOPTERIDJE 



Argyra diaphana, F. 



argentina, Mg. 

 Syntormon pallipes, F. 

 Xiphandrium caliginosum, Mg. 



monotrichum, Lw, 

 Sccllus notatus, F. 

 Hydrophorus prjecox, Lehm. 

 Liancalus virens, Scop. 

 Campsicnemus curvipes, Fin. 



Flies of this family are very common everywhere, and they seem to be of four varieties, 

 but whether these are really different species is open to question. 



Lonchoptcra punctum, Mg. 

 trilineata, Ztt. 



Lonchoptcra lacustris, Mg. 

 tristis, Mg. 



The individuals of the next two families are by no means common ; one or two specimens 

 of a few species are all that have as yet been observed. 



PLATYPEZID^E 



Callimyia speciosa, Mg. Callimyia amoena, Mg. 



Verrallia pilau, Ztt. 



PIPUNCULIDjE 



Pipunculus furcatus, Egg. 

 terminalis, Thorns. 



SYRPHID^E 



Pipunculus campestris, Ltr. 

 pratorum, Fin. 



The Hoverer or Hawk-flies are fairly well represented in this county, about 4.0 per cent, 

 of the British species having been taken within its borders. Ischymyrphus glaucius was very 

 abundant at Gibside in 1896, but usually it is rather uncommon, though generally distributed. 

 Arctopkila mussitans is a strangely local fly. It has appeared year after year in fair numbers 

 within a day or two of the 28th August, at the corner of a certain field near Hesleden, but 

 has only once been observed at any other time or place. Merodon has been getting commoner 

 of late, doubtless owing to the importation of foreign bulbs. 



Pipizella virens, F. 

 Pipiza noctiluca, L. 

 Liogaster metallina, F. 

 Chrysogaster hirtella, L. 

 Chilosia maculata, Fin. 



sparsa, Lw. 



pulchripes, Lw. 



variabilis, Panz. 



- intonsa, Lw. 



- illustrata, Har. 



- imprcssa, Lw. 



- albitarsis, Mg. 



- fraterna, Mg. 



I vernal is, Fin. 

 proxima, Ztt. 

 Platychirus manicatus, Mg. 



- peltatus, Mg. 



- scutatus, Mg. 



- albimanus, F. 



Platychirus clypeatus, Mg. 



angustatus, Ztt. 

 Pyrophxna granditarsa, Forst. 



rosarum, F. 

 Melanastomum mellinum, L. 



- scalare, F. 

 Leucozona lucorum, L. 

 Ischyrosyrphus glaucius, L. 

 Catabomba pyrastri, L. 



selenitica, Mg. 

 Syrphus albostriatus, Fin. 



albostriatus var. confusus 



tricinctus, Fin. 



venustus, Mg. 



lunulatus, Mg. 



torvus, Ost. Sack. 



vittiger, Ztt. 



grossularix, Mg. 



ribesii, L. 



'35 



Syrphus vitripennis, Mg. 



latifasciatus, Mcq. 



corolla;, F. 



luniger, Mg. 



hifasciatus, F. 



balteatus, Deg. 



cinctellus, Ztt. 



cinctus, Fin. 



auricollis, Mg. 



auricollis var. maculicornis, 



Ztt. 



umbellatarum, F. 



- compositarum, Verr. 



- labiatarum, Verr. 

 Sphacrophoria scripta, L. 



- scripta var. nigricoza, Ztt. 



menthastri, L. 



menthastri var. picta, Mg. 



menthastri var. taeniata, Mg. 



