264 Transactions. — Zoology. 



Antennae 2 + 15 jointed ; first joint of scapus yellow, 

 slightly longer than broad, cyathiforni ; second joint orange, 

 short, cylindrical, length about equal to its diameter; both 

 joints of scapus almost naked ; all joints of flagellum black, 

 but the first has a ring of light-yellow at its lowest end ; 

 length and diameter of joints decreasing slightly from below 

 upwards ; all the joints are covered with a black pubescence, 

 and have a few stiff black hairs near the middle. Proboscis 

 moderately long, grey above but black below. Palpi four- 

 jointed ; first joint grey, narrow, and short ; second joint 

 orange, long, and greatly swollen, clothed with yellow and 

 black hairs; third moderately short and narrow, dark-brown, 

 with a black pubescence ; fourth about twice the length of 

 the third, covered with black pubescence. Eyes eniarginate, 

 separated by a very narrow line just above the antennae. 

 Ocelli three, two lateral large, central one moderate ; situated 

 almost in a line. Vertex narrow. Thorax dark-brown, with 

 a narrow yellow line down the centre, and two broad lateral 

 lines meeting in a semicircle in front, and tapering towards 

 one another posteriorly ; another longitudinal lateral stripe 

 just above the wing; the yellow is bordered with dark-brown, 

 which becomes lighter away from the yellow stripes ; surface 

 covered with small black hairs, and a row of strong hairs is 

 situated on each lateral margin. Scuteilum and metathorax 

 dark-brown. Epimera mottled dark-brown and light-yellow. 

 Halteres with a slender pedicel, terminating m an orange- 

 coloured club, dark at the base, and covered with a short 

 pubescence. Abdomen of seven segments, dark-brown on the 

 median line, but light-yellow on each side. Forceps of the 

 male orange in colour. Legs long and slender ; coxae stout, 

 light-yellow in colour, but shaded with dark-brown ; femora 

 dai'k-yellow, the two posterior pairs being dark in the centre ; 

 tibiae brown, long and slender, clothed with short black hairs ; 

 the anterior tibiae have a single spine, the posterior have two 

 short spines each ; short stiff hairs at intervals ; tarsi dark- 

 brown, clothed with black hairs of two sizes. Wings very 

 broad at apex, but cuneiformly narrowed at the base, clothed 

 with scattered scales, especially near the inner margin, and 

 with hairs near the apex. Auxiliary vein rudimentary ; first 

 longitudinal ending in costa at about five-sixths the length of 

 the wing ; second and third longitudinals with a common 

 petiole ; anterior branch of second longitudinal very long, 

 bending slightly downwards at the tip ; posterior branch 

 strongly bent, ending just before the end of the costa, near 

 the apex of the wing; fork of the third longitudinal nearer 

 the apex of the wing than that of the second ; both branches 

 feebly developed, and ending close behind the apex of the 

 wing ; both branches of fourth longitudinal well developed ; 



