46 PROCEEDINGS OF THE NATIONAL MUSEUM vol. G9 



a normal manner from R^. The discal (r— m) cross vein is then 

 forked beyond its middle, one branch ending free in the first pos- 

 terior cell and the other joining the discal cell. The general appear- 

 ance given is that of a normal R5 which ends shortly after its origin 

 and which has a short cross vein extending between it and the dis- 

 cal cell. This may be a modification of the spurious vein. But it 

 would seem that we have here a relic of R5 ; and perhaps the " ad- 

 ventious " branch on the third vein in most Microdontinae and 

 Ceriodinae is also a relic of E.^. 



One male and one female, Valparaiso, Chile (A. Faz) ; one fe- 

 male, Santiago, Chile (A. Faz). Determined by J. M. Aldrich. 

 Two other species have been described in this genus — cyaneum 

 Philippi; nigrinerve Philippi. 



ry/?^.— Santiago, Chile (?). 



Genus STERPHUS Philippi 



Genotype. — {Sterphus antennalis Philippi) (by original inclu- 

 sion) ^A'^/Zo^a coerulea Rondani. 



STERPHUS COERULEA (Rondani) 



Xylota coerulea Rondani, Archivio per la Zoolog., vol. 3 (sep.), p. 8, 1863. 

 Sterphus antennalis Philippi, Verb. Zool.-bot. Ges. Wien., vol. 15, 1865, p. 737. 



/Sterphus coerulea possesses all of the essential features of Xylota 

 (sensu stricto) : Metasternum faintly pubescent; head broadly ellip- 

 tical; arista as long as width of face; metathoracic spiracle larger 

 than third antennal joint; hind trochanter of male spurred; venation 

 of the same type. It differs in having the face and frontal triangle 

 golden yellow, the face raised to a broad median ridge, appearing 

 inflated; width of lower face — that is, between oral margin and 

 lower margin of eye — nearly three times as broad as width of third 

 antennal joint (about equal in width in Xylota segnis) ; the protho- 

 racic spiracle enlarged and yellowish; the body broader with dis- 

 tinctly longer pile ; abdomen shining, very dark blue. 



One male, Chile (E. C. Reed) ; two males, Valparaiso, Chile (A. 

 Faz). Determined by J. M. Aldrich. 



Type. — ^Location unknown. 



STERPHUS AURIFRONS, new species 



Mesonotum largely obscured by brownish poUinosity, pile brown- 

 ish; all the tibiae are more or less reddish brown; abdomen largely 

 shining very dark metallic green, opaque on posterior margins of 

 second and third tergite, black pilose, rather long and dense on apex 

 of abdomen, rather long and yellowish on anterior corners of second, 



