147 



Optstiiacantha austealica, sp. nov. 



9 ■ Head and thorax black ; abdomen dark-brown ; legs 

 pale-yellow, suffused with black ; antennae dusky-black. Head 

 transverse, a little wider than the thorax. Antennae 12- 

 jointed ; scape long and slender ; pedicel one-half longer than 

 wide ; first funicle-ioint slender, as long as pedicel, and 

 slightly narrower ; second almost as long as first ; third shorter, 

 but distinctly longer than wide ; last funicle-joint very small : 

 club 6- jointed, joints 1-5 much wider than long, third 

 the widest. Thorax longer than wide ; mesonotum with two 

 furrows. Forewings moderately short ; rather narrow ; much in- 

 fuscated ; marginal cilia equal to one-sixth greatest wing width : 

 discal cilia fine, arranged in about twenty rows ; submarginal 

 vein attaining the costa about the middle of the wing ; mar- 

 ginal vein two-thirds length of stigmal, which is oblique, rather 

 short, with a distinct knob ; postmarginal three times length 

 of stigmal; basal and median veins present. Abdomen no 

 longer than head and thorax united ; wider than the thorax ; 

 petiolate ; first segment as long as wide ; second longer ; third 

 the longest, equal to one-half abdominal length ; first and 

 second segments striate. Length, 1'45 mm. 



Described from a single specimen caught while sweeping 

 jungle in a bog June 31, 1912. 



Hah. — North Queensland: Innisfail (A. A. Girault). 



Type. — I. 1385, South Australian Museum. A female, 

 tagmounted, plus a slide bearing antennae and forewings. 



Opisthacantha nigriceps, sp. nov. 



9 • Head black ; thorax and abdomen reddish-brown ; 

 legs and antennal scape golden-yellow ; rest of antennae dusky- 

 black. Structure of head, thorax, and abdomen as in 

 ausfralica. Antennae 12-jointed ; scape long and slender ; 

 pedicel rather short; first funicle-joint longer than pedicel, 

 twice as long as wide ; second a little longer than wide ; third 

 as wide as long; fourth very small, a little widened; club 

 6- jointed, third and fourth joints the widest. Forewings 

 when closed not reaching apex of abdomen ; moderately nar- 

 row ; inf uscated ; submarginal vein atttaining the costa 

 beyond the middle of the wing ; marginal vein two-thirds 

 length of stigmal, which is very oblique ; postmarginal three 

 times length of stigmal ; basal vein distant from the marginal 

 by nearly its own length. Length, 140 mm. 



Described from a single specimen labelled "Sweeping 

 grass, etc., jungle, October 28, 1911." 



Hah. — North Queensland : Babinda, 36 miles south of 

 Cairns (A. A. Girault). 



