DIPTHRA. 401 
chest: legs tawny; fore-legs pitchy: wings with a tawny tinge; veins 
tawny ; lower cross-vein upright, almost straight: halteres tawny. Length 
of the body 1} line; of the wings 34 lines. 
United States. 
ScIoMZa PARALLELA, Mas. 
Fulva; caput flavum, albo trivittatum ; antenne ferruginee basi fulve ; 
thorax cinereus ; pedes testacei, tibiis anticis apice tarsisque anticis 
ferrugineis ; ale sublimpide. 
Tawny: head yellow, with a shining white covering; crown luteous, 
with three white stripes; epistoma not prominent: mouth ferruginous ; 
palpi tawny: feelers tawny ; third joint ferruginous, somewhat obconical, 
slightly bent upward, tawny towards the base, full twice the length of the 
second ; sixth bare, very slender, black towards the tip, more than twice the 
length of the third: chest cinereous: breast with a hoary covering: abdo- 
men a little longer and narrower than the chest: legs testaceous; fore-feet 
and tips of fore-shanks ferruginous: wings almost colourless; veins tawny, 
black towards the tips ; lower cross-vein almost straight and upright: hal- 
teres yellow. Length of the body 13 line; of the wings 4 lines. 
United States. 
Genus TETANOCERA, Duméril. 
TETANOCERA CoRNUTA, Fom. 
Fulva ; antenne picee, arista alba; thorax fusco irivittatus, lateribus 
albido vittatis ; pectus canum ; abdomen ferrugineum ; pedes fulvi, 
tarsis piceis; ale subcineree, ad costam fulve. 
Tawny: mouth pitchy: feelers pitchy ; first joint tawny towards the 
base; third very long, hairy, clavate ; fourth seated on the tip of the second ; 
sixth white, slender: chest with three brown stripes; a whitish stripe on 
each side: breast hoary: abdomen ferruginous, tapering towards the tip, 
longer than the chest; legs tawny; feet pitchy; thighs armed beneath 
with minute spines: wings slightly gray, tawny along the fore border; 
veins ferruginous; fifth vein approaching very near the tip of the fourth ; 
