12 DIPTERA 



Genus-PLATYUEA. 

 Meigen. 



Prol30scis a little protruding ; fourth joint of the palpi rather 

 longer, and more slender than the others. Anteunse compressed ; the 

 two first joints distinct, the others finely haired. Eyes oval. Ab- 

 domen slender, narrowed at the base, depressed at the extremity. 

 Subcostal cell sometimes open, sometimes closed by the radial vein. 



P. TRIDENS, Sp. nOV. 



Female. Thorax yellow, with three broad longitudinal dark-brown 

 bands which blend together anteriorly, the central one much shorter, 

 not extending more than half-way down the thorax ; anterior margin 

 dark brown. Scutellum yellow in the centre, brown on each side. 

 Thorax and scutellum with a few long black bristles. Abdomen 

 dark brown, the posterior half of each segment yellow. Head brown. 

 Ocelli three, placed in line convex to the front. Proboscis and palpi 

 yellow. Antennae rather longer than the head and thorax ; the first 

 and second joints yellow ; the third to the eighth ringed yellow and 

 brown ; remainder brown. Legs yellow ; the tarsi dark brown. 

 Wings with a slight dusky tinge ; veins dark brown ; the three branches 

 of the discoidal vein faint, disconnected. A dark patch on the 

 radial vein, another in the centre of the cubital cell ; cross vein with 

 a broad dusky margin. Subcostal cell closed. 



Length, 3 lines. 



Wellington. 



This species differs from Platyura in the construction of the palpi, 

 which are only three-jointed. The first is thick and with bristles j 

 the second and third are slender, the last pointed. The antennae are 

 eighteen-jointed, the last joint very small; the first two joints are 

 thick and cyathiform, the remainder compressed ; they are tomentose, 

 and nearly as long as the head and thorax. The epistome has a short 

 blunt snout, covered with short hairs. Thorax very convex, one-third 

 the length of the abdomen. Ovipositor very thick at the base. 

 Wings long, with only one basal cell ; four incomplete posterior cells. 



Genus-SCIAEA. 

 Meigen. 



Head spherical. Palpi three-jointed, distinct. Antennae filiform ; 

 the two first joints separated from the others, almost cylindrical. 

 Eyes reniform, approximating on the vertex. Abdomen cylindrical 

 in the male, pointed in the female. Thighs groove internally. Basal 

 and subcostal cells narrow. 



