12 



ting the antennae ; f irst antennal jomt long and slender ; the second 

 iiearly as long but of larger girth; the third is a little more than one- 

 half the length of the first and bearing a three jointed styie, the apex 

 of whieh is whitish; face broad, parallel sided and with a narrow 

 yellowish stripe on eaeh side extending from the oral margin to the 

 eye, 



Thorax: — Black, with a trace of yellow on the pos^ a'ar ealli 

 and the hind margin of the scntelhim. 



Legs: — Black; mid tibia with a tnft of hairs extending from its 

 middle nearly to the apex, these hairs blackish basally bnt becomina' 

 palé outwardly; basitarsal joint of midd'e leg with long loóse whitish 

 hairs on lower sur face. 



Ahdomen : — Black, base of second tergite yellow ; second segment 

 strongly constricted at its base, its length a little greater than its 

 posterior width ; hypopygium pointed apically. 



Wing: — Strongly infuscated basally and anterior to the third 

 vein beyond the posterior crossvein and posterior to the third vein the 

 v/ing is hyaline; stigmatical crossvein very indistinet ; anterior cross 

 vein joining the discal eell well beyond the middle. 

 Halteres yellow, the head with a black spot. 



Femare : — Like the male, bnt with the front moderately broad 

 and a velvetj' black spot on each side, contigiious to the eye ; also 

 A\ithout the long hairs on the middle tibia and basitarsus. 



Five males, eight females, on flowers. 



Tyjpe locaJity: — Alta Gracia, Córdoba (20 January, 1927, R. C. 

 Shannon). Also from Deán Funes, Córdoba (25, 1, 27, Shannon) and 

 San Pedro de Jnjuy, Jnjuy (3 May, 1926, Shannon & Shannon). 

 These last specimens were taken at the sap of trees. 



Polyhiomyia lyncharrihahagai, new species. 



Female: — A modérate sized (12.0 mm. ; wing 9.5 mm.) black 

 species with the anterior border black infuscated. Very similar in 

 general appearance to the preceding species. 



Head : — Triangular from frontal aspect, the face moderately 

 produced downwards ; front black ; a large velvety black spot bord- 

 ering the eye margin below this and opposite the antenna a yellow 

 spot borders the eye margin ; antenna black ; tip of style whitish ; face 

 black, broad, with parallel sides; a faint pair of yellowish submedian 

 facial stripes which are well separated from both the oral and the eye 

 raargins. 



Thorax: — Black; a distinct yellowish pruinose stripe follow- 

 ing the depressions of the transverso sviture but not extending clear 

 across; anterior and posterior margins of seutellum faintly yellow. 



Legs : — Black ; without tufts of hair. 



Al)domen : — Black, base of second segment strongly constricted 

 and yelloM'. 



Wing: ■ — Only the anterior margin (anterior to the rhird vein) 

 biack; discal crossvein joining the fourth vein immediately beyond the 

 laiddle of the discal eell. 



