DIPTERA. 407 
tinge along the borders of the veins; veins pitchy, tawny towards the 
base ; lower cross-vein almost straight, slightly oblique, indistinctly clouded 
with brown: halteres yellow. Length of the body 14—1% line; of the 
wings 34—4 lines. 
United States. 
NovripHILaA ARGENTAYA. 
Fusca, tomentosa ; caput argenteum; antenne nigre, thorax fusco quad- 
rivittatus ; pectus et abdomen subtus alba ; pedes fulvi, tarsis piceis ; 
ale subcineree. 
Brown, downy: head silvery white in front and beneath; epistoma 
prominent: feelers black; third joint oblong, much longer than the second ; 
sixth black, feathered with long hairs: chest with four dark brown stripes, 
the inner pair almost contiguous: breast white: abdomen obconical, a little 
longer than the chest, white beneath: legs tawny; shanks darker than the 
thighs ; feet pitchy: wings slightly gray; veins black; lower eross-vein 
straight, upright, parted by twice its length from the middle cross-vein : 
halteres tawny. Length of the body 1} line; of the wings 3 lines. 
United States. 
NoripHita TRANSVERSA, Fem. 
Nigra, fusco-tomentosa ; antenne picee ; thorax cinereo bivittatus ; abdo- 
men cinereo-tomentosum, apice attenuatum; tarsi fulvi; ale fusco- 
cinerea. 
Black, with a brown covering, beset with long bristles : feelers pitchy ; 
third joint rounded at the tip, much longer than the second ; sixth black, 
feathered with long hairs: chest with two gray stripes: abdomen obconical, 
with a gray covering, a little shorter than the chest; tip attenuated and 
furnished with two slender appendages: legs black; knees ferruginous ; 
feet tawny: wings gray, slightly tinged with brown ; veins black, tawny at 
the base ; middle cross-vein very near the base; lower cross-vein slightly 
oblique, a little bent inward, hardly clouded with brown: halteres luteous. 
Male? Feelers tawny: chest not striped? knees tawny: cross wing- 
veins clouded with brown ; lower cross-vein much curved inward. 
Length of the body 1}—1} line; of the wings 3—3} lines. 
United States. 
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