141. Psilopa. 19S9 



toto, infiiscato, seta circiter O-radiata. Ei>istoina utrinqiie siil- 

 catiiin, totiim argenfeum. Infra meiliiiin ulrinqiie vibrissa so- 

 lilaria. Sela mystacina iilrinqiie iiiiica. Pal[ii relracti, nigri. 

 Ociili inagni, ovales. GenjD lirevissimce. Tliorax fiisco-niger, 

 liaiul nitens, postice una ciim sciitello concolore jiarce setosus, 

 Alnlomen late ovale, (leplanatnm, niidiim, nigriim, oi>acum, mar- 

 gine apicali nititlo, omnium sulitilissime punctulatum. Segmen- 

 tuin l:mum valtle breve, sed tamen perspicuum, 2:(1iim duplo 

 longius, 3:tiiim 2:do saltem dimidio longius, &^ 4:tum 3:tio 

 iterum sallein diinidio longius, ita ut segmenta a l:mo ad 4:tum 

 gradaliin elongenlur; 5:liim brevissimum, nitidum, e superno 

 parum manifesliim. Alse pallescenti liyalinse, iiervis ul in Ps. 

 nitidula (1), directis, nervo transv. interdum piincto fiisco notato. 

 Halteres allii. Pedes validiusculi, niidi, ut in diagnosi colorati, 



Obs. Nomen Trimcrina Dlacq., quod insectum Iribus ahdominis 

 segmenlis prwdilinn significaret, luiic speciei, quae 6 segmenlis, 

 licet 1, 5 &^ 6 lirevissimis, instruitur, non ajitari potest. 



6. Ps. marginella: oblonga, nJgricans, snhnilens; 

 ^pislomale subaigenleo; anlennis fusco-leslaceis; abdomine 

 oblongo, convexo, segmenlis 2, 3 d: 4 magnis, laeviusculis; 

 alis abdomine bievioribus, albido-hyalinis, cosla angusle, 

 punclo apicis nervoquc transverso ordinario nigiicanlibus, 

 segmenlo cosla; 2:do 3:lio nonnibil breviore; pedibus nigris, 

 larsis ftavis, arliculo tillimo obscuro. ^'^. (Long. vix ^ lin.). 



Fall. Hydromyz, 7. 3. $. Noliphila Meig. Dipl. 6, 

 14. 33, (ex doscriplionc Falleniana Iransscripla). — • Di- 

 scomyzu Slenh. Monogr, Ephydr 266- 2. 



Hab, in Suecia meridionali <fe media rarissimc, duo 

 tantum specimina, ulraque a ine invenla, baclcnus quan- 

 Inm noverim cognila; scilicel unum (femineum) in gra- 

 ininosis loco paludoso occidenlem versus ad villam Abusa 



2ij 



