= eee he 
314 INSECTA SAUNDERSIANA, 
third: chest with a cinereous covering and with four black stripes, the outer 
pair interrupted, broader than the inner pair: abdomen obconical, a little 
longer than the chest, black towards the tip: legs tawny, stout; feet black : 
wings almost colourless ; prebrachial vein forming a very obtuse angle at 
its flexure, almost straight from thence to its tip ; lower cross-vein with the 
two curves which are slight: alule white with pale yellow borders: hal- 
teres tawny. Length of the body 4 lines; of the wings 9 lines. 
United States. 
DEXIA ANGUSTA. 
Testacea ; caput et pectus alba; scutellum apice flavum ; abdomen flavum, 
maculis tribus trigonis piceis semivittatum, apice fuluum ; antenne 
nigre, basi fulve ; pedes fulvi, tarsis nigris; ale anguste, sub- 
limpide. 
Testaceous, slender, almost linear: head white, clothed behind and be- 
neath with white hairs; frontalia ferruginous, very slender, widening 
slightly towards the feelers: mouth tawny ; palpi yellow; feelers black ; 
first and second joints tawny ; third tawny towards the base; sixth feathered 
with very short hairs: breast white: scutcheon yellow towards the tip : ab- 
domen yellow, tawny at the tip, with a pitchy triangular spot on the hind 
border of each segment from the first to the third, that of the first segment 
very small: legs long, tawny ; feet black : wings narrow, almost colourless ; 
veins black, tawny towards the base ; prebrachial yein forming a very ob- 
tuse angle at its flexure, nearly straight from thence to its tip ; lower cross- 
vein with two curves, the lower inward, deeper than the other which is 
outward: alule very pale yellow: halteres tawny. Length of the body 
34 lines; of the wings 8 lines. 
Brazil. 
DEXIA AUSTRALIS. 
Nigra; caput argentewm ; thorax cano trivittatus, scutello apice ferru- 
gineo ; abdomen albo-micans, fulvo bivittatum ; tibie picee ; ale 
cinerea. 
Black: head silvery white, clothed behind and beneath with white 
hairs ; frontalia black, widening from the eyelets to the feelers; a ferrugi- 
