INSECTS 



DOLICHOPODID.E 



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

 places in the dales ; triviii/is, tennis, and G. eerosus are common everywhere ; of the others, 

 only a few have been met with here and there. 



Psilopus platyptcrus, F. 

 Ncurigona quaJrilhsciat.i, F. 

 Dolichopus .itripcs, Mg. 



— vitripcnnis, Mg. 



— atratus, Mg. 



— picipes, Mg. 



— plumipcs, Scop. 



— pennatus, Mg. 



— popularis, W. 



Dolichopus urKinus, Mg. 



— griscipcnnis, Stan. 



— trivi.ilis, Hal. 



— brevipennis, Mg. 



— neneus, Dcg. 

 Hcrcostomus nigripcnnis, Fin. 

 Gymnopternus cupreus, Fin. 



— aerosus, Fin. 

 Chrysotus gramineus. Fin. 



Argyra di.iph.ina, F. 



— argentina, Mg. 

 Syntormon pallipcs, F. 

 Xiphandrium caliginosum, Mg. 



— monotrichum, Lw, 

 Scelius notatus, F. 

 Hydrophorus prxiox, Lehm. 

 Liancalus virens, Scop. 

 Campsicnemus curvipes. Fin. 



LONCHOPTERIDiE 



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. 



Lonchoptera punctum, Mg. 

 — trilineata, Ztt. 



Lonchoptera lacustris, Mg. 

 — tristis, Mg. 



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

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



PLATYPEZIDiE 



Callimyia speciosa, Mg. Callimyia amoena, Mg. 



Verrallia pilosa, Ztt. 



PIPUNCULIDiE 



Pipunculus fiircatus. Egg. 

 — terminalis, Thorns. 



SYRPHID^ 



Pipunculus campestris, Ltr. 

 — pratorum, Fin. 



The Hoverer or Hawk-flies are fairly well represented in this county, about 40 per cent, 

 of the British species having been taken within its borders, hchyrosyrphui glaucius was very 

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

 Arctophila 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 hirtclia, L. 

 Chilosia maculata. Fin. 



— sparsa, Lw. 



— pulchripes, Lw. 



— variabilis, Panz. 



— intonsa, Lw. 



— illuscrata, Har. 



— tmpressa, Lw. 



— albitarsis, Mg. 



— fratema, Mg. 



— vernalis. Fin. 



— proxima, Ztt. 

 Platychirus manicatus, Mg. 



— peltatns, Mg. 



— scutatiu, Mg. 



— albimanui, F. 



Platychirus clypcatus, Mg. 



— angustatus, Ztt. 

 Pyropha:na granditarsa, Forst. 



— rosarum, F. 

 Mclanastomum mellinum, L. 



— scalare, F. 

 Lcucozona 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. 



— vittigcr, Ztt. 



— grossularii, Mg. 



— ribesii, L. 



Syrphus vitripcnnis, Mg. 



— latifasciatus, Mcq. 



— corollae, F. 



— luniger, Mg. 



— bifasciatus, F. 



— balteatus, Deg. 



— cinctellus, Ztt. 



— cinctus, Fin. 



— auricollis, Mg. 



— auricollis var. maculicornis, 



Ztt. 



— umbellatarum, F. 



— compositarum, Vcrr. 



— labiatarum, Vcrr. 

 Sphaerophoria scripta, L. 



— scripta var. nigricoxa, Ztt. 



— menthastri, L. 



— menthastri var. picta, Mg. 



— menthastri var. taeniata, Mg. 



