Mr. J, C. Dale on some British Diptera. 431 



cnbitalis furcatus, ramo anterioie brevi (4 posterioris), areola externa 2da 

 (limidio tertia; paulo longior : hracliialis 2da parum brevior Ima."— Hal. MS. 

 This species I find in plenty in a damp part of a small coppice 

 here during the end of June and beginning and middle of July. 



Curtis's Guide, genus 1157, Limnobia. (Subgenus Idiocera ?) 

 L. sex-guttata. — Fusca, antennis medio flavicantibus, thorace schista- 

 ceo vittii duplicata fusca, pedibus ferrugineis, alis obscure hyalinis 

 albo fuscoque variegatis, guttis 3 marginalibus albis ante apicem. 



^ Long. 2| ; alar. 5| lin. 



? 3. 7i- „ 



" Fusca. Antennae thoracis longitudine articulis intermediis flavicantibus 

 basi fuscis extremis valde aiteniiatis. Thorax sclustaceus vittis 2 fusco-fer- 

 rugineis in scuterium contiuuatis. Venter fusco-testaceus. Terebra rufes- 

 cens graciUs recurva. Pedes cum coxis ferriiginei. Femora et tibiffi apice, 

 tarsi praeter basin fusci. Ala; obscure hyalinje, indistincte albo-raaculatae. 

 Costa fusco-punctata. Nervi transversi et axillaris apex fusco-maculati. 

 Costa fusco-limbata a furca nervi cubitalis usque in apicem, guttis 3 albis, 

 unica in areola singula. Nervus subcostalis exit adversus fiircam nervi 

 cubitalis. Nervus niedicistinus adversus apicem areolae brachialis 2dce exit, 

 et cum subcostale connectitur contra ortum radii. Cubitus furcatus ramis 

 liberis, posteriore apice incurvo. Areolee externa 2da (quae petiolata) di- 

 midia longitudine anterioris, nervo posteriore ejusdem basi rectangulatim 

 fracto et appendiculato (scilicet areolae disci incompletie) ; areolae brachialis 

 posterior multo brevior anteriore." 



I discovered this exceedingly pretty Limnobia on a boggy spot on 

 Cosmore common near this place, and afterwards lost another out of 

 my net in the New Forest, and lastly, on the sea-coast at Charmouth 

 I took two or three more specimens. 



The dates are June 22, 1840. 



July 1, 1839 (Cosmore common). 

 July 8, 1840 (Charmouth). 



It appears to be very rare. Mr. Haliday says it is very distinct, 

 and one of the prettiest species he ever saw ; it was quite new to him. 

 I have also given a pair to Mr. Curtis. 



I have a ^ Limnobia fasciata from the lakes of Cumberland, taken 

 by G. Wailes, Esq. Mr. Haliday says it is also found in Lapland. 

 The L. (or Idioptera ?) var. } of marmorata ? or pulchella ? I took in 

 tolerable plenty, in one particular spot only (where the common 

 marmorata, though it varies much, did not occur), and they agree in 

 size and markings as well as may be. The date is end of Alay 18^0 

 and 1841, and at no other time 7 this seems in favour of its being a 

 distinct species. 



Curtis's Guide, genus 1217, Oxycera. 

 O. longicornis. — '" Nigra, macula laterali verticis, orbita interna supra 

 antennas repanda, thoracis vitta laterali, scutello et abdominis limbo 

 flavis ; antennis capitis longitudine apice pariim attenuatis. ? " 



Mr. Haliday has this unique species, and I cannot give the exact 

 measure, but it is about the size of 0. muscariu. 



" Nigra subglabra. Antenna; solito longioi-es et graciliores, articulis ex- 

 tremis pariun attenuatis, undo stylus indiscrctus : os flavum : orbita postica 

 et interna flavie, haec supra antemias in marginc froiitis inflexa. Vertex 



