278 MEMOIRS OF THE QUEENSLAND MUSEUM. 



1. MACRODONTOMERUS TRIANGULARIS GiraiUt. Female. Genotype. 



Lengtli, 2.40 mm., exclusive of ovipositor which is somewhat shorter than the body. 



Brilliant metallic wneous green, the knees, tibis and tarsi straw-yellow, the rest of the 

 legs concolorous. Wings hyaline, the stignial vein very short, only half the length of the 

 short postmarginal. Cephalic femora short, swollen, the posterior femora slightly enlarged 

 and with a small tooth beneath before apex (also a slight indication of a second one farther 

 pniximad) and veiw minutely subserrulate. Antenna? with two ring-joints, the first funicle 

 joint longest, slightly longer than wide, shorter than the pedicel; antenna; black. Thorax 

 finely transversely lined and scaly. 



Habitat : Mittagong, New South Wales. 



Type: No. I.1SS5. Soutli Australian Museum, Adelaide. 



2. MACRODONTOMERUS JUSTITIA new species. Female. 



Length, 3 nmi., excluding the exserted valves of the ovipositor which arc somewliat 

 longer than the globular abdomen. 



Bright metallic green, the wings hyaline, tlie legs and antemnp pale straw yellow; hind 

 loxa; concolorous. Abdomen pale straw, crossed above by two or three widely separated dusky 

 stripes. Mandibles tridentate, the antenna" 1.3-jointed with two ring-joints, tlie first two funicle 

 .joints e(inal, longest, a little wider than long, the following joints shortening gradually, the 

 pedicel somewliat longer than the first fnni(de joint. Hind tibial spurs double. Scutelluni 

 simple; propodeum with iiu obscure pair of short median carina*. Head and all of the 

 tliorax finely scaly and transversely lineolated, the propodeum slightly smoother. 



Habitat: Gordonvale (Cairns), Queeuslaiul. From galls on forest trees, December VJ, 

 11112 (A. P. Dodd). 



Type: No. Hy3Si)3, Queensland Museum, Brisbane, the female on a tag, the appendages 

 nil a slide. 



3. MACRODONTOMERUS UNIMACULATUS (iirault. Female. 



Length, 2.43 mm., excluding ovijiositor which is a little longer than the abdomen. 



Dark metallic coppery green, the abdomen brown, lilack above, the ovipositor valves 

 black, the scape and pedicel brown, rest of antenna black. Second segment of abdomen 

 incised at meson of caudal margin. Legs yellowish including the coxa. Fore wings with a 

 large, conspicuous, ovate, brownish spot in the middle, its long axis obliqued, its blunter end 

 just eaudad of the stignial \ein. Head and thorax densely punctate, the propodeum smooth 

 ^xcept along cephalic margin, brilliant coppery and with a median carina. 



All funicle joints longer than wide, the first longest, subequal to the pedicel, the sixth 

 a third shorter, only slightly longer than wide. Mandibles tridentate. 



Hahilal : Ingham, Queensland. February 16, 1911-!. 



Type: No. HyS^'B-i. Queensland Museum, Brisbane, the female on a tag and a slide 

 hearing the ajipendages. 



4. MACRODONTOMERUS ATRICORNIS new species. 



Female: — Length, 2. .50 mm., excluding ovipositor. 



Agrees with triaiii/alaria but the exserted portion of the ovipositor is only slightly 

 longer than the abdomen, about half the length of the body and the first funicle joint though 

 only somewhat longer than wide is as long as or somewhat longer than the short pedicel. The 

 yellow portions of the legs are lemon yellow. Mandibles tridentate. Hind margin of second 

 segment of abdomen with an acute notch at meson. Propodeum with a thin median carina, 

 s-ulptured like the rest of the thorax or nearly but the scntnm, scutellum, axilla' and parajisides 

 hear many scattered thimble jinnctures. 



Male: — The same but the ring-joints somewhat shorter, the abdomen depressed. 



