318 Mr. F, Walker's Characters of undescribed Diptera 



sides and pectus also white ; abdomen slightly tessellated ; wings 

 slightly greyish ; veins black ; praebrachial vein curved ; ending 

 at the tip of the wing ; discal transverse vein straight, parted by 

 half its length from the border and by more than its length from 

 the flexure of the praebrachial; alulae whitish. 



Length of the body 3| lines; of the wings 7 lines. 



Natal. 



Genus Hylemyia, Desv. 

 Hijleinyia probata. 

 Mas. — Atra, gracilis, arista subplumosa, abdomine pedibusque 

 nigris, alis nigricantibus apud costam nigris, vena praebra- 

 chiali arcuata, vena discali transversa recta, alulis nigrican- 

 tibus. 

 Male. — Deep black, slender : arista slightly plumose ; abdomen 

 and legs black ; wings blackish, black along the costa ; veins 

 black ; praebrachial vein curved, ending at just in front of the 

 tip of the wing ; discal transverse vein straight, parted by a little 

 more than half its length from the border, and. by very much 

 more than its length from the flexure of the praebrachial ; alulae 

 blackish. 



Length of the body 2 lines ; of the wings 4 lines. 

 Mexico. 



Genus Ccenosia, Meigen. 

 Coenos'ta intacta. 

 Cana, subsetosa, antennis pallide rufis longiusculis apice nigri- 

 cantibus, abdominis segmentis nigro-bimaculatis albo-mar- 

 ginatis, pedibus testaceis, femoribus cinereis, alis albis, venis 

 albidis, halteribus testaceis. 

 Hoary, slightly setose : antennte pale red, blackish towards the 

 tips, extending to the epistoma j third joint rather long ; arista 

 black ; abdominal segments with a black spot on each side, their 

 hind borders white ; legs testaceous ; femora cinereous, with tes- 

 taceous tips ; wings white ; veins whitish ; costal vein black ; discal 

 transverse vein straight, upright, parted by nearly twice its length 

 from the border and by much more than its length from the prse- 

 brachial transverse vein ; halteres testaceous. 



Length of the body I| lines ; of the wings 2^ lines. 

 United States. 



