DIPTERA, 319 
Dexia QuADRIMACULATA, Mas. 
Nigra ; caput album; thorax cervinus, nigro quadrivittatus ; abdomen tes- 
taceum nigro vittatum et quadrimaculatum ; antenna picee, basi 
Sulve ; pedes fulvi, femoribus posticis nigro vittatis, tarsis nigris ; ale 
fusco-cineree, 
Black: head with a silky white covering, clothed beneath and behind 
with white hairs; frontalia black; antennaria tawny; facialia without 
bristles ; epistoma prominent: eyes bare: proboscis pitchy, slender, tawny 
towards the base, longer than the chest; palpi tawny : feelers tawny ; third 
joint pitchy, linear, not reaching the epistoma, rounded at the tip, tawny 
beneath towards the base, more than twice the length of the second 3 sixth 
black, slender, feathered to the tip with short hairs, more than twice the 
length of the third: chest with a fawn-colour covering and with four black 
stripes, outer pair of stripes interrupted, shorter and broader than the inner 
pair; breast paler: abdomen testaeeous, obconical, much longer than the 
chest, with two black spots on each side, and with a black stripe which widens 
from the base and occupies the whole breadth towards the tip where there are 
pale reflections : legs tawny; hind-thighs striped with black towards the tips ; 
feet black; wings brownish gray; prebrachial vein forming a very obtuse 
angle at its flexure, straight from thence till near the tip where it is slightly 
bent inward; lower cross-vein with two curves which are very slight: 
alule grayish with pale yellow borders: halteres yellow. Length of the 
body 44 lines; of the wings 5 lines. ; 
Brazil. 
Genus SARCOPHAGA, Meigen. 
The species here described may be grouped thus : — 
a. Third feeler-joint four times the length of the second....... Cynomyia. 
hirtipes. 
aa. Third feeler-joint thrice the length of the second. 
b. Sixth feeler-joint feathered. 
c. Legs thickly clothed with long hairs. 
hirtipes, 
ec, Legs thinly clothed with short hairs. 
