Some New Parasitic Hymenoptera from Australia. 



167 



Described from a single <J specimen caught while sweeping 

 forest, summit of mountain ränge, 1500 feet, Nelson, N. Q., 

 30th May, '13 (A. A. Girault). 



Habitat: North Queensland (Nelson, near Cairns). 



Type: In the South Australian Museum, a $ on a slide. 



2. Paridris rufinotum Dodd. 



Two females of this species were caught while sweeping the 

 forest slopes of Mount Pyramid, 1500—3000 feet, Nelson, N. Q., 

 2nd June, 13 (Alan P. Dodd). 



3. Paridris nigrithorax sp. nov. 

 Fe male: Length, 1.50 mm. 



Like tridentata Dodd but the parapsidal furrows are present 

 and terminate before reaching the posterior margin of the meso- 

 notum; marginal vein two-thirds as long as the stigmal, discal 

 cilia very fine and dense. Mandibles tridentate. Differs from 

 rufinotum Dodd in having the thorax wholly black, the parapsidal 

 furrows not complete; the forewings slightly narrower, and the 

 discal cilia finer and denser. 



(From 3 specimens, etc.) 



Male: Unknown. 



Described from 3 9 specimens caught with the above mentioned 

 specimens of rufinotum. The fourth Australian species of the genus. 



Habitat: North Queensland (Mt. Pyramid, 1500—3000 feet, 

 near Cairns). 



Type: In the South Australian Museum, a $ tagmounted 

 plus a slide bearing head, antennae, and forewings. 



Genus Opisthacantha Ashmead. 



1. Opisthacantha nigriceps Dodd. 



A female of this species was caught while sweeping foliage 

 in a jungle, Nelson, N. Q., 4th June, 13 (Alan P. Dodd). 



2. Opisthacantha flavipes sp. nov. 

 Fe male: Length, 1.50 mm. 



Black; abdomen suffused with brown; legs, including coxae, 

 golden yellow. 



Antennae 12-jointed; pedicel one-half longer than wide; 

 Ist funicle joint a little shorter than the pedicel; 2nd shorter than 

 the Ist, scarcely longer than wide; 3rd as wide as long; 4 th very 

 minute; club 6-jointed, Ist and 2nd joints very small, 4th club 

 joint the widest and longest of club. Forewings scarcely reaching 

 apex of abdomen; moderately narrow; almost hyaline; discal cilia 

 very fine and dense; submarginal vein attaining the costa about 

 the middle of the wing; marginal vein two-thirds as long as the 

 short stigmal vein; postmarginal vein three times as long as the 

 stigmal; basal vein obsolete. 



Abdomen with Ist and 2nd segments striate; ovipositor a 

 little exserted. 



6. Heft 



