408 



base to near the tip where it again widens ; sixth white, leathered, yellow 

 at the base, much longer than the third : chest with three yellow stripes ; 

 a slightly oblique yellow baud on each side of the chest which is tinged 

 with white : abdomen obconical, not longer than the chest, yellow beneath 

 and along each side : legs tawny ; thighs armed with little black spines 

 towards the lips beneath ; fore-thiglis, fore-shanks and hind-shanks with a 

 black spot towards the tips; feet darker than the shanks; fore-shanks 

 black, yellow towards the base : wings gray, brown along the fore border ; 

 veins pitchy ; lower cross-vein straight, slightly oblique ; cross-veins be- 

 tween the filth and sixth and between the sixth and seventh veins in one 

 line, straight, upright, rather long : halteres yellow. Length of the body 

 3 — 3^ lines; of the wings 6 — 7 lines. 



Amazon River. 



Genus E^ETEROMYZA, Fallen. 



Hetero.myza uodusta, Mas. 



Fulva, cinereo-tomentosa ; caput nigra maculalum ; antenna: tesfacece, 

 articulo 3o nigra mnculato ; thorax ca.no trivittatus, scutelli apice 

 pectorisqiie maculis duabus albis ; pedes flavi, femnribus tibiisque 

 piceo bifasciatis ; ahe subcinerecc, e guttis fiiscis sex-viltatce. 



Tawny, with a cinereous covering : crown with a lanceolate tawny 

 stripe ; a black spot round the eyelets and one on each side ; face short ; 

 epistoma prominent ; peristoma broad, slightly prominent: mouth pitchy ; 

 palpi tawny : feelers testaceous ; third joint with a black spot above, longer 

 and much deeper than the second ; sixth extremely slender, black towards 

 the tip, full four times the length of the third : chest with three hoary 

 stripes ; tip of the scutcheon white: breast with a yellowish white spot on 

 each side : abdomen obconical, a little shorter than the chest : legs yellow ; 

 thighs and shanks with two pitchy bands ; fore-thighs and hind-thighs 

 stout : wings slightly gray, with six rows of brown spots and dols ; veins 

 black, tawny at the base ; lower cross-vein very oblique, very slightly bent 

 outward near its tip : halteres yellow. Length of the body 2:^ lines ; of 

 the wings 5 lines. 



Van Dieman's Land. 



