206 Mr. F. Walker's Characters of undescribed Diptera 



abbreviatis subauratis, abdomine ferrugineo compresso lon- 



gissimo basipetiolato, fasciis duabus testaceis,pedibus testaceis 



longis, femoribus nigro-fasciatis, coxis posticis et tarsis anticis 



nigris, alls cinereis longis angustis, costa venisquelurido-mar- 



ginatis, alulis albidis minimis. 



Female. — Black, very slender, with pale shining cinereous 



tomentum ; head whitish in front and beneath ; frontalia deep 



black, widening in front ; face with a slight middle keel ; facialia 



without bristles ; epistoraa not prominent; eyes bare ; palpi and 



antennae tawny; disk of the thorax and that of scutellum black 



and shining, the former with three short pale gilded stripes in 



front, abdomen ferruginous, compressed, petiolated towards the 



base, more than thrice the length of the thorax ; third and fourth 



segments testaceous at the base ; legs testaceous, long, slender ; 



femora with black bands ; hind coxae and fore tarsi black; wings 



grey, long and narrow, lurid along the costa and along the veins, 



which are ferruginous; discal transverse vein emitting a very short 



branch and forming a right angle at its flexure, straight from 



thence to its tip, which ends at somewhat in front of the tip of the 



wing ; discal transverse vein very slightly undulating, parted by 



much less than half its length from the border, and by about its 



length from the flexure of the praebrachial ; alu lae whitish, very 



small ; halteres testaceous. 



Length of the body 7| lines; of the wings 11 lines. 

 South America. 



Sub-fam. 4. Sarcophagides, 



SYNOPSIS. 



* Vena praebrachialis extus flexuram arcuata. 

 -j- Corpus latum; tibiae posticae arcuatae. P/irmoporfa, Macq. 

 •j-'f Corpus vix latum; tibiae posticae rectae aut subarcuatae. 

 J Corpus non metallicum. 

 § Antennarum articulus 3"*, 2° triplo longior. 

 ■ X Abdominis segmentum 2""* margine setoso. Sarcophaga, 

 Meig. 

 X X Abdominis segmentum 2"™ margine non setoso. 

 -+• Antennae non breves, /igria, Desv. 

 — i — J- Antennae breves. Mlcrocerella, Macq. 



§ § Antennarum articulus 3"*, 2" quadruple longior. Diaugia, 



Perty. 

 J J Corpus metallicum, micans. 

 § Caput non depressum. 



