BY W. M. MASKELL. 281 



gestation active, naked, or covered with thin white meal which 

 sometimes appears like short cotton at the posterior end. Antennae 

 tapering, with eleven joints : the joints are all nearly equal, and 

 somewhat hairy. Feet rather thick : tibia and tarsus fringed on 

 the inner side with strong spiny hairs : upper digitules very short, 

 lower pair represented by a short, stiff, seta : claw slender : femur 

 rather thick. Anogenital ring apparently absent, but a simple 

 transverse orifice, with a smaller one on each side of it, may be 

 detected at the anal extremity. Rostrum and mentum entirely 

 absent, but there seems to be an orifice between the first pair of 

 feet, situated in a deep corrugation of the ventral skin. After 

 treatment with caustic potash the skin is seen to be marked with 

 a sreat number of oval, semi-translucent cells, in the middle of 

 each of which is a small brown cone bearing a minute orifice at the 

 top. Anal tubercles absent. 



Adult male dark red, the wings bluish-purple with red nervures. 

 Length of body about I inch ; expanse of wings neax-ly | inch. 

 Eyes large, facetted. Antennae of ten joints, the first two short, 

 the next four rather long and slender, the rest somewhat shorter : 

 there are no nodosities on the joints, but numerous very short 

 hairs on each. Haltere very large, ovate, bearing a single curved 

 seta at the end. Abdomen distinctly segmented : no lateral 

 tassels. From the last three segments but one there spring, 

 dorsally, a number of white, glassy, delicate, straight filaments, 

 coalescing to form a brush-like tail which in some specimens is 

 nearly three times as long as the body. The last segment ter- 

 minates in a short, conical sjiike from which protrudes the penis. 

 Feet long, slender : digitules very short and fine. 



Ilab. — On Ango^yhora sp., Sydney, N. S. Wales. I am indebted 

 to Mr. A. Sidney OllifF for specimens of adult males and females, 

 obtained by him in January, as also for the opportunity of 

 describing the species. 



This very large and handsome insect is clearly distinct, not only 

 in the colour and skin-markings of the female, but also in the 

 peculiar " brush " of the male. I have not seen either the larva 



