14 



pleura; the mesopleura, sternopleura and pteropleura pilóse; metas- 

 ternimi completely girdled with cliitin. 



Legs: — Fore coxae,'all femora and fore tibiae yellow; remainder 

 of legs darkened, but the mid and hind tibiae have broad yellowish 

 bands beyond the middle; hind tibia with a sub-basal curvature; base 

 of hind basitarsus with a scale-like expansión fringed with strong 

 setae. 



Abdomen: — Shining blaek, hypopygiiim silvery pruinose; basal 

 lergite with yellow hairs; remainder of abdomen with black hairs. 



Wing : — Faintly infnscated ; distance between tips of third and 

 íourth veins less than length of anterior crossvein. 



Haltere : — Brownish basally, whitish beyond, a row of short setae 

 along anterior margin. 



Eight males. 



Type Locality. — Qviebrada de Lules, Tucnmán (2 February, 

 1927, R. C. Shannon). Also Tafi Viejo, Tuciimán (14.8.27, Del Ponte 

 and Shannon). 



This species is named in honor of Doctor E. D. Dallas organizer 

 and president of the Sociedad Entomológica Argentina. 



RESUMEN 



Las siguientes familias de Dípteros, son citadas por la primera 

 vez para ]a Argentina : Leptidae, Scenopinidae, Platypezidae, Pipuncu- 

 lidae, Tanypezidae, Rhopalomeridae, Psilidae, Heteroneuridae, Geomy- 

 zidae. P.yrgotidae y Apioceridae. 



Además se describen nuevas especies : 



Chrysopila argentina y delpontei (Leptidae) ; 



Platypcza thomseni y tucumana y Agathomi/ia austrnHs (Platy- 

 pezidae) ; 



Fipnncidus lynchi, doelloi, schreiteri y tncumanus (Pipuncu- 

 lidae) ; 



Tanypeza dáílasi (Tanypezidae). 



Microdon l)ruchi y Polyhiomyia lyncharribahagni son también es- 

 pecies nuevas y Cerioides harhipes Loew (Syrphidae), han sido encon- 

 trados en Córdoba. 



(E.D.P.) 



