PTIOLINA. 71 



thorace bivittato, alls limpidis basi et ad costam fulvis, pedibus nigris, 

 genubus fulvis. Long. 3 ; alar. 7 lin. 



Cinereous. Head hoary in front and beneath, clothed with pale 

 yellow hairs. Epistoma flat, broad. Proboscis black, clothed with a 

 few tawny hairs. Palpi cinereous, thickly clothed with tawny hairs. 

 Antenna? ferruginous, black towards the tips. Thorax with 2 darker 

 stripes; underside hoary. Wings colourless, tawny at the base and 

 along the fore border ; stigma pale brown ; veins black, tawny towards 

 the base. Halteres tawny, with darker knobs. Legs black ; knees 

 tawny. 



Rare. (S.) 



Genus IV. PTIOLINA. 



PTIOLINA, Stager; Ztt. d. s. i. 226 (1842). Leptis p., Mn. ; Ztt. 



Atherix p., Mg. 

 Corpus minoris magnitudinis, subpubescens, oblongum, postice parum 



attenuatum. Color niger, cinerascens. Oculi fusci, parum seneo- 



micantes. Antennae articulo quarto brevi. Alas abdomine paullo 



longiores. 



Mas. Oculi conjuncti. 

 Fcem. Oculi remoti. 



Body of small size, slightly pubescent, oblong, cinereous or black ; 

 hinder part not much attenuated. Eyes slightly metallic; facets of 

 moderate size. Ocelli seated on a tubercle. Fourth joint of the an- 

 tennae short. Wings a little longer than the abdomen. 



Male. Eyes contiguous. 



Fern. Eyes remote. 



These flies inhabit fields and woods during the summer, and 

 often rest on leaves and trunks of trees; their movements are 

 slow. 



1. melsena, Hms. ; Mg. ii. 109. 6 (1820). Alis fuscis. Mas. 

 Atra, thorace subvittato subtus cinereo, abdomine subtus fusco. Fcem. 

 Cinerea, capite ferrugineo, thorace nigro-bivittato, pedibus fuscis. 

 Long. 1^- ; alar. 4 lin. 



Wings brown. Male. Deep black, thinly clothed with short black 

 hairs. Thorax grey beneath. Stigma dark brown ; veins black. Hal- 

 teres large, dark brown. Abdomen beneath brown. Fern. Dark ci- 

 nereous. Head ferruginous. T/torax with 2 indistinct black stripes. 

 Halteres dark tawny, with brown knobs. Legs brown. 



Eare. (E. S.) 



2. immaculata, Fb. s. a. 74. 10 (1805); Mg. Oinerea, capite 

 cano, alls subcinereis, pedibus nigris, tibiis basi fulvis, tibiis anticis pal- 

 lidioribus ; Mas. tfiorace subvittato ; Foem. subtus cana, thorace fusco- 

 trivittato. Long. l-J-2 ; alar. 3-4 lin. 



