PTIOLINA. 71 



thorace bivittato, alls Umpidis basi et ad costam fidvis, pedibus nigris, 

 geuubus Mvis. Long. 3 ; alar. 7 lin. 



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

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

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

 Antennae ferruginous, black towards the tips. Thorax with 2 darker 

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

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

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

 tawny. 



Eare. (S.) 



Genus IV. PTIOLINA. 



Ptiolina, Staeger; Ztt. d. s. i. 326 (18-i2). Leptis p.. Fin.; Ztt. 



Atherix p., Mg. 

 Corpus minoris magnitudinis, subpubescens, oblongum, posticc parum 



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



micantes. Antenna articulo quarto brevi. Alae abdomine paullo 



longiores. 

 Mas. Oculi conjimcti. 

 Foeni. 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- 

 tennce 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). Alls fuscis. Mas. 

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

 Cinerea, capita feniigineo, thorace Higro-bivittato, pechbus fuscis. 

 Long. 1-i ; alar. 4 lin. 



Wings broivn. Male. Beep black, thinly clothed ^vith short black 

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

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

 nereous. Head ferruginous. Thorax with 2 indistinct black stripes. 

 Halteres dark ta^\^ly, with brown knobs. Legs brown. 



Rare. (E. S.) 



2. immaculata, Fb. s. a. 7^-. 10 (1805); Mg. Cinerea, capite 

 cano, alis subcinereis, pedibus nigris, tibiis basi iulvis, tibiis anticis pal- 

 lidioribus ; Mas. thorace subvittato ; Fcem. ^w\Avi^ csndt., thorace fusco- 

 trivittato. Long. 14-2 ; alar. 3-4 lin. 



