74 MEMOIRS OF THE QUEENSLAND MUSEUM. 
latter. Either parallel evolution has been at work or there is ro basic reason for separation 
or else the characteristics of the two groups have been overlooked. The number of tibial spurs 
on the caudal legs seems to be without significance. I have used the tribal separations for the 
present. My own table is not a good one and is used here for descriptive reasons only. It 
was compiled before I was able to use Ashmead’s table and also because some group characters 
used in that table seem to me very trivial, e.g., sculpture. Some of the old genera are very 
indefinite and hardly valid. 
GeNus ECHTHROBACCHA Perkins. 
With the habitus of the ectromine Echthrodryinus Perkins but the head is rather more 
menisciform, the front between the eyes is much wider, the system of large punctures on the 
head is much more distinct, the punctures larger, not dense, sparser toward the facial impression. 
- The maxillary palpi are longer, the fourth joint much more elongate. The ocelli form more of an 
equilateral triangle, the caudal ones well separated (but not much) from the eye margins. 
The marginal vein is rather longer. Mandibles tridentate, the inner tooth broadly truncate. 
Antenne usual. Oblique hairless line wedgeshaped, not reaching the marginal vein. Post- 
marginal vein short. 
1. ECHTHROBACCHA INJURIOSA Perkins. Female. Genotype. 
Length, 1.25 mm. 
Head black, faintly metallic, with evident large, shallow punctures scattered over the 
front, most numerous about the ocelli; funicle joints increasing slightly and gradually in width 
from 2 to 6. Mesonotum shining, finely distinctly punctated and clothed with short dark hairs. 
and black with metallic greenish tints. Scutellum dark at base, finely punctured, clothed with 
short hairs and with a few scattered, long and erect ones. Mesopleura black with a purplish 
lustre. Wings hyaline, uniformly ciliate. Abdomen triangular, with a purplish lustre. Antenne 
sordid yellow, the club generally entirely dark. Tibie and tarsi yellow, the front and hind 
femora usually blackish for the most part. 
Habitat: Cairns, Queensland. Parasitic upon Baccha. 
Type: Query. 
Genus ECTOPIOGNATHA Perkins. 
Head moderate, lower face much inflexed, frontal space between the eyes moderately wide; 
eyes with short, pale hairs. Front with a dense microscopic sculpture and more or less evident 
traces of faint, sparse punctures. Ocelli apparently in an equilateral triangle, the caudal ones 
separated slightly from the eyes. Mandibles broad, with three distinct teeth and an inner 
angulation resembling a more minute fourth one. Maxillary palpi very short, 4-jointed. 
Antenne 11-jointed, the club ovate, 3-jointed, the scape much dilated ventrad, the pedicel 
long; funicles 2 and 3 smallest, a little wider than long; club about two thirds the length of 
the funicle. Mesonotum with very fine surface sculpture and scattered feeble punctures which 
are setigerous. Axilla separated at meson. Wings with short marginal cilia, evenly ciliate, 
the hairless line present. Marginal vein a little longer than wide, dilated, the postmarginal 
indicated, the stigmal distinct, somewhat shorter than the marginal. Abdomen short, sub- 
triangular, depressed dorsad, with a fovea on each side toward the base and which bears very 
long sete, often so closely appressed as to be visible only on careful examination. Ovipositor 
barely extruded. 
1. ECTOPIOGNATHA MINOR Perkins. Female. Genotype. 
Length, 0.75 mm. 
Head metallic green, the scape black, rest of antenna pale yellow except the dark distal 
half of club; mesoscutum brilliant metallic eneus, pilose, shining, the scutellum usually darker, 
