AUSTRALIAN HYMENOPTEBA CHALCIDOIDEA, IV.— GIRAULT. 257 



PAKAPKOSTOCETUS new genus. 

 Like Trichaporoidella Girault but the scutum bears a median sulcus. 



1. PARAPROSTOCETUS PURPUREITHORAX new species. Genotype. 



Female: — Length, 1 mm. 



Dark metallic purple, the wings hyaline, the antenna?, legs and abdomen rich golden 

 yellow, the abdomen with two purple cross-stripes just before tip, the second a little broader 

 and more distinct, the extreme tip purple and the lateral margin along the short distance 

 between tip and the second or distal cross-stripe. Tip of valves of ovipositor purple. Abdomen 

 conic-ovate, somewhat longer than the thorax. Funicle joints subequal, each a little longer 

 than wide, the pedicel about equal to either of them; second two ring-joints very short. Club 

 with a minute nipple at apex. Scape rather short. Mandibles tridentate but the third tooth 

 minute. Stigmal vein short. Sculpture normal. Propodeum very finely scaly, very short at 

 the meson, without lateral carinas, the spiracle cephalad and in a short longitudinal depression 

 or half channel, the median carina present, very short. Thorax with scattered, inconspicuous 

 setae which are not numerous. 



From one female captured by sweeping bushes on October 10. 1913 (G. P. Hill). 



Habitat: Port Darwin, Northern Territory. 



Type: No. Hy 2641, Queensland Museum, Brisbane, the specimen on a tag. 



2. PARAPROSTOCETUS SANNIO (Girault). 

 From Quadras! ich us. Propodeum with a median carina, no others; funicle joints as in 

 Ootetrastichus beatus Perkins. Femora purple along dorsal edge. Marginal stripe of abdomen 

 broad. Second two ring-joints very short, usually concealed. Base of abdomen nearly free 

 from purple. Type re-examined. A second female, type habitat, February 19, 191 4. 14 



DUOTKASTICHUS new genus of A. P. Dodd. 



Female: — Similar to Tetrastiehus Haliday but the antennae 9-jointed, with four ring- 

 joints, two funicle and a solid club. 



1. DUOTRASTICHUS MONTICOLA new species of A. P. Dodd. Genotype. 



Female: — Length, 1.75 mm. 



Head, legs (except dusky hind coxa 1 ) and basal third of abdomen golden yellow. Thorax 

 very dark asneous green, the scutellum chocolate brown, the postscutellum lemon yellow; apical 

 two thirds of abdomen dark brown, more or less obscurely, transversely striped with black; 

 ocelli in a dark area. Antennae yellow-brown. With the usual fine tetrastichine sculpture. 

 Median groove of scutum complete. Scutum with a row of shallow punctate depressions just 

 within the parapsidal furrows. Abdomen conic-ovate, no longer than rest of body, almost 

 straight above, gently convex beneath. Propodeum rather short, scaly, with a median carina. 

 Wings hyaline, marginal vein as long as submarginal, stigmal moderately long. Pedicel rather 

 long but slightly shorter than either of the funicle joints, of which 2 is somewhat the largest; 

 club wider but no longer than preceding joint, with a short terminal nipple. Eyes garnet. 

 Mandibles tridentate. 



From one female captured by sweeping in forest, summit of Mount Pyramid, 3.000 feet f 

 August 17, 1912 (A.A.G.). 



Habitat: Mount Pyramid (Cairns), Queensland. 



Type: No. Hy 3642, Queensland Museum, Brisbane, the specimen on a tag; head on a 

 slide. 



14 A third, July 10. In this specimen the mesal two of the usual four grooves on the scutellum were practically 

 absent, indicated at apex only. The coxae are purple. 

 R 



