ART. 9 FLIES OF THE FAMILY SYRPHIDAE SHANNON 31 



discal cross vein well before middle of discal cell; wings entirely 

 smoky. Length 11 mm,; wing 9 mm. 



Two males, one female. 



Type locality. — Valparaiso. Chile (A. Faz) ; also from Santiago, 

 Chile (A. Faz), 



n/;>^.— Male. Cat. No. 28750, U.S.N.M. 



PENIUM TRISTE Philippi 



PoUum triste Philippi, Verb. Zool.-bot. Ges. Wien, vol. 15, 1865, p. 741. 



The species described by Bigot as Chilosia aurantipes, from Chile, 

 may prove to be this species. 



Mcue. — Entirely black; eyes hairy; face pilose, pale and black 

 mixed: femora black; tibiae reddish yellow basally and apically, 

 broadly black at the middle; fore and mid tarsi reddish brown; 

 hind tarsi reddish yellow, becoming brown apically. 



Originally described from Chile. One male at hand, Santiago, 

 Chile (A. Faz). 



VALDIVIA, new genus 



Three specimens, two males and one female, representing three 

 species are at hand which appear to belong to the same, evidently 

 new, genus. All three are from Chile. A species described by 

 Philippi as Ocyptamus valdivmnus from the province of Valdivia 

 may also belong to this genus. 



Description of the genus. — Fairly large, elongate flies, related 

 more or less to the tribe Sphegini of the Chilosinae. The males are 

 dichoptic, the face is tuberculate and the abdomen is constricted 

 basally. The female has the face concave and the abdomen of 

 nearly uniform width, there being a slight, progressive narrowing 

 towards the base. In both sexes the face is not pilose; the palpi are 

 unusually long and slender; the venation is quite similar to the 

 Chilosine type, except that the apical cross vein is twice angled; the 

 alula is as broad as the second basal cell; the anal furrow is con- 

 siderably reduced; the metasternum is bare and may be completely 

 girdled with chitin or membranous behind. 



Genotype. — Valdivia darwini, new species. 



Named in commemoration of Pedro de Valdivia, the early Spanish 

 explorer of Chile. 



KEY TO SPECIES OF VALDIVIA 



A\ All the femora, tibiae, and tarsi entirely reddisb yellow. 



darwini, new species. 

 A^ All tbe femora and tibiae extensively black. 



B\ Abdomen black nigra, new species. 



B^ Abdomen reddish nificauda, new species. 



