278 MEMOIRS OF THE QUEENSLAND MUSEUM. 
1. MACRODONTOMERUS TRIANGULARIS Girault. Female. Genotype. 
Length, 2.40 mm., exclusive of ovipositor which is somewhat shorter than the body. 
Brilliant metallic wneous green, the knees, tibize and tarsi straw-yellow, the rest of the 
legs concolorous. Wings hyaline, the stigmal vein very short, only half the length of the 
short postmarginal. Cephalic femora short, swollen, the posterior femora slightly enlarged 
aud with a small tooth beneath before apex (also a slight indication of a second one farther 
proximad) and very minutely subserrulate. Antenne with two ring-joints, the first funicle 
joint jlongest, slightly longer than wide, shorter than the pedicel; antenne black. Thorax 
finely transversely lined and scaly. 
Habitat: Mittagong, New South Wales. 
Type: No. I.1335, South Australian Museum, Adelaide. 
2. MACRODONTOMERUS JUSTITIA new species. Female. 
Length, 2 mm., excluding the exserted valves of the ovipositor which are somewhat 
louger than the globular abdomen. 
Bright metallic green, the wings hyaline, the legs and antennz pale straw yellow; hind 
coxe concolorous. Abdomen pale straw, crossed above by two or three widely separated dusky 
stripes. Mandibles tridentate, the antennz 13-jointed with two ring-joints, the first two funicle 
joints equal, longest, a little wider than long, the following joints shortening gradually, the 
pedicel somewhat longer than the first funicle joint. Hind tibial spurs double. Secutellum 
simple; propodeum with an obscure pair of short median carinew. Head and all of the 
thorax finely scaly and transversely lineolated, the propodeum slightly smoother. 
Habitat: Gordonvale (Cairns), Queensland. From galls on forest trees, December 12, 
1912 (A. P. Dodd). 
Type: No. Hy 3293, Queensland Museum, Brisbane, the female on a tag, the appendages 
on a slide. 
3. MACRODONTOMERUS UNIMACULATUS Girault. Female. 
Length, 2.43 mm., excluding ovipositor which is a little longer than the abdomen. 
Dark metallic coppery green, the abdomen brown, black 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 caudad of the stigmal vein. Head and thorax densely punctate, the propodeum smooth 
except 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 
« third shorter, only slightly longer than wide. Mandibles tridentate. 
Habitat: Ingham, Queensland. February 16, 1913. 
Type: No. Hy 3294, Queensland Museum, Brisbane, the female on a tag and a slide 
bearing the appendages. 
4. MACRODONTOMERUS ATRICORNIS new species. 
Female :—Length, 2.50 mm., excluding ovipositor. 
Agrees with triangularis 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, 
sculptured like the rest of the thorax or nearly but the scutum, scutellum, axilla and parapsides 
bear many scattered thimble punctures. 
Male:—The same but the ring-joints somewhat shorter, the abdomen depressed. 
