DIPTERA. 381 
Tryreta pivisa, Fom. 
Testacea ; scutelli discus niger; abdomen vitta dorsali apice maculisque 
nonnullis laterulibus nigris ; pedes flavi, femoribus basi piceis apice 
subtus spinosis; ale hyaline, fasciis duabus maculaque apicali 
Sfuscis. 
Testaceous, shining: head pitchy about the eyelets: epistoma promi- 
nent: mouth pale ferruginous: third joint of the feelers long-conical, more 
than thrice the length of the second joint ; sixth black, long very slender, 
thinly pubescent: chest clothed with short black hairs ; a black spot on the 
scutcheon: abdomen with a short black stripe and on each side some black 
spots, not longer than broad, excepting the tube-like tip which is flattened, 
lanceolate, and black ; hind borders of the segments pale testaceous: legs yel- 
low ; thighs at the base and hips pitchy ; thighs armed beneath at the tips 
with black spines ; feet pitchy towards the tips: wings colourless, apparently 
very minutely squamose; a dark brown spot extending from the base to the 
basal cross-veins which are inclosed in a dark brown band ; a dark brown 
band extending from the fore border to the middle cross-vein, and a spot on the 
tip of the wing ; veins black, lower cross-vein straight, very slightly oblique : 
alule tawny, thickly fringed: halteres yellowish white. Length of the 
body 3—8} lines; of the wings 7—74 lines. 
Var. 8. Abdomen with a row of dorsal spots instead of the stripe ; 
apical tube testaceous, with a broad black band. 
Brazil. 
TRYPETA PARALLELA. 
Testacea ; caput et pectus flava ; thorax fusiformis, ferrugineo trivittatus ; 
abdomen cylindricum ; pedes flavi; ale subfulve, stigmate luteo 
maculaque apicali fusca. 
Testaceous, slender, shining : head yellow in front and beneath: mouth 
ferruginous; palpi yellow: feelers yellow; third joint conical, much longer 
than the second; sixth black, bare, slender, yellow at the base: chest 
spindle-shaped, with three ferruginous stripes: breast yellow: abdomen 
cylindrical, almost linear, narrower and a little longer than the chest: 
legs yellow: wings pale tawny, with a luteous brand on the middle of the 
fore border, and with a tittle brown spot at the tip; veins pitchy, tawny 
3 D 
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