632 



DIPTERA OF AUSTRALIA, 



Fam. SIMULID^. 



Genus Simulium, Latreille. 

 Simulium, Latr., I.e., p. 1364, pi. xxxix., figs. 1-lb. 



485. Simulium ornatipes, sp.n. 



$■ — Length of antennae 0-017 inch ... 0-42 millimMre. 



Expanse of wings 0-105 x 0-050 ... 2-67x1-27 



Size of body 0-090 x O'OSO ... 2-27x0-76 



9' — Length of antennse 0-017 inch .. 0-42 millimetre. 



Expanse of wings 0-120 x 0055 . . 3-04x1-39 



Size of body 0-100x0-035 ... 2-54x0-88 



$. — Antennae short, black or dark brown, lighter towards the 

 tip, covered with a microscopic hoary pubescence ; the joints of 

 the scapus usually fulvous, sometimes brown or black ; 2 + 9- 

 jointed ; first flagellar joint larger than the second joint of the 

 scapus ; the next seven joints short ; terminal joints narrower, 

 ovate. Eyes, proboscis and palpi black ; face hoaiy, with a 

 sUvery-white pubescence. Thorax velvety-black, with two indis- 

 tinct lines, the lateral margins, a large patch at the humeri, and 

 the posterior portion, covered with shining silvery and golden 

 pubescence ; pleurae and metanotum black ; squama behind the 

 halteres densely fringed with long golden-yellow hairs ; scutellum 

 covered with silvery and golden pubescence, Halteres pale fulvous 

 or ochreous, the stem brown. Abdomen black, anterior segments 

 sparingly covered, and the last two or three margined posteriorly, 

 with golden pubescence. Fore coxae yellow, the intermediate and 

 hind pairs yellow, black at the apex, with golden-yellow or silvery 

 pubescence ; tibiae yellow in the middle, black at the base and 

 apex, with golden pubescence ; tarsi black, the basal half of the 

 metatarsal and second joint in the hind-legs usually yellow. In 

 the hind-legs the metatarsus robust, longer than the remaining 

 joints of the tarsi. Wings longer than the entire body, hyaline. 



