8 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 78 



between them and suture); acrostichal 0, 0; humeral 2 (or 3); 

 posthumeral 2; notopleural 2; presutural 1; supraalar 3; intraalar 

 2; postalar 2; sternopleural 3; scutellum with 2 lateral, 1 small 

 subdiscal, no apical. Propleura bare. Pleurae white pollinose on 

 upper half and on sternopleura. 



Abdomen with rather thin gray pollen, the dark ground showing 

 through; an indistinct median dark stripe and on each side a dark 

 spot on the anterior two-thirds of segments 2-4. No median mar- 

 ginals on segments 1 and 2, 3 with a pair, well separated from the 

 lateral marginals; 4 with row of 8, large. Genital segments re- 

 tracted, dark red. 



Legs black; middle tibia with 3 bristles on outer front side, the 

 uppermost small. 



"Wings subhyaline; first vein setulose from humeral halfway to 

 its tip ; third setulose about halfway to small crossvein ; fourth with 

 rectangular bend, thence straight to costa considerably before apex, 

 the first posterior cell open. Hind crossvein joining fourth vein 

 at last fourth of distance from anterior crossvein to bend. Epaulet 

 and basicosta yellow. 



Length 8.5 mm. 



Sarcophaga albicans, p. 363. 



Two males from the Vienna Museum. " Brasilien, Coll. Winthem." 

 Undoubted types. Brauer and Bergenstamm included the species 

 with two others in their new genus Tripanurga described in Zweif- 

 liigler des Kaiserlichen Museums zu Wien (pt. 5, 1891, p. 3C3), and 

 placed it alone in the genus 2 years later (pt. 6, p. 165) ; Townsend 

 designated albicans as type of Tripanurga in Insecutor Inscitiae 

 Menstruus (vol. 4, 1916, p. 9). 



Tripanurga appears to be a valid genus, the type species resembling 

 Sarcophaga pachyprocta Parker (type of M etoposavcophaga Town- 

 send) in the blunt abdomen with large genital segments, the hairy 

 second vein, the presence of outer verticals in the male, the absence 

 of apical scutellars in the male, and the absence of pale hair on the 

 back of the head except a little below ; it differs in the possession of 

 a single pair of proclinate orbitals in the male, and in the absence 

 of anterior acrostichals. It also resembles Sarcophaga sulculata 

 Aldrich {Zygastropyga Townsend) in the shape of the abdomen 

 and absence of acrostichals, but differs in lacking villosity on hind 

 tibiae, the occurrence of orbitals in the male, etc. 



Male. — Front at narrowest (below middle) 0.40 of head width; 

 lower front prominent, forming an angle with face. Parafrontals, 

 parafacials, cheeks, and posterior orbits with silvery pollen; the 

 parafacials with only a few slender hairs; inner verticals large, 

 outer two-thirds as long; ocellars normal, upper frontal reclinate 



