812 INSECTA SAUNDERSIANA. 
from the eyelets to the feelers: mouth pitchy, with a ferruginous tip; palpi 
ferruginous : feelers black; third joint slightly deepening from near the 
base to near the tip, ferruginous at the base, more than thrice the length of 
the second joint, not reaching the epistoma; sixth downy for half the length 
from the base: chest and breast with a cinereous covering, excepting four 
black stripes on the chest, the inner pair slender: abdomen spindle-shaped, 
more than twice the length of the chest, pitchy on each side, where it is 
adorned with four large subquadrate cinereous spots: legs black: wings 
gray, brown along the fore border and about the borders of the veins ; veins 
black, tawny at the base ; prebrachial vein forming an obtuse angle at its 
flexure, hardly curved inward by this, almost straight from thence to the 
tip; lower cross-vein with two slight curves, the lower inward, the upper 
outward: alule whitish with pale yellow borders: halteres tawny with yel- 
low knobs. Length of the body 8 lines; of the wings 13 lines. 
South America, 
DEXIA convexA, Fem. 
Nigra; caput argenteum ; thorax cervinus, nigro sexviltatus ; abdomen 
Suloum, nigro vittatum; antenne basi fulve ; pedes fulvi, tarsis 
nigris ; ale cineree, ad venas fusce. 
Black: head with a silvery white covering, clothed beneath and behind 
with pale yellow hairs; crown fawn-colour ; frontalia brown, widening 
from the eyelets to the feelers; facialia without bristles; epistoma promi- 
nent: eyes bare: palpi tawny ; feelers black; first and second joints 
tawny; third black, linear, rounded at the tip, tawny at the base, not 
reaching the epistoma, more than twice the length of the second; sixth 
slender, feathered with short hairs, stout at the base, more than twice the 
length of the third : chest with a fawn-colour covering which is interrupted 
by six black stripes: abdomen oval, tawny, broader and a little longer than 
the chest, with a black stripe wideniny at the base and more so towards 
the tip which is wholly black : legs tawny ; feet black : wings gray, brown 
along the veins which are black, and at the base tawny ; prebrachial vein 
forming an obtuse angle at its flexure, straight from thence till near the 
tip where it is slightly bent inward ; lower cross-vein with the two curves 
which are slight: alule gray, with pale yellow borders. Length of the 
body 5 lines; of the wings 11 lines. 
Brazil. 
