74 MEMOIES OF THE QUEENSLAND MUSEVM. 



latter. Either parallel evolution has been at work or there is do basic reason for separation 

 or else the characteristics of the two };ronps 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 Asliniead's table and also because some group characters 

 used in that table seem to me very trivial. (..(/.. sculpture. Some of the old genera are very 

 indefinite and hardly valid. 



Gesvs ECHTHROBACCHA Perkins. 



With the habitus of the ectromine Eclilliiriilri/iiiua Perkins but the head is rather more 

 meniseiform, the front between the eyes is mucli wider, the system of large punctures on the 

 head is much more distinct, the punctures larger, not dense, sparser toward the facial impression. 

 Tlie 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. 

 Antennaj usual. Oblique hairless line wedgeshaped, not reaching the marginal vein. Post- 

 marginal vein short. 



1. ECHTHROBACCHA INJURIOSA Perkins. Female. Genotj^ie. 



Length. 1.2-5 mm. 



Head black, faintly metallic, witli evident large, shallow punctures scattered over the 

 front, most numerous about the ocelli; fnnicle 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. Antenna; 

 sordid yellow, the club generally entirely dark. Tibia; and tarsi yellow, the front and hind 

 femora usually blackish for the most jiart. 



Saiitat: Cairns. Queensland. Parasitic ujiou Bacclia. 



Type: Query. 



Gexus ECTOPIOGNATHA Perkins. 



Head mmlerate, lower face much inflexed, frontal S|iace 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 pali>i very short, -l-jointed. 

 Antenna; lljointed, the club ovate. 3-joiuted. the scape much dilated ventrad, the iiedicel 

 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 scnl|iture and scattered feeble punctures which 

 are setigerous. Axill89 separated at mescui. "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, witli a foNea on each side toward the base and which bears very 

 long seta>, often so closely apiu-essed as to lie visible only on careful examination. Ovipositor 

 barely extruded. 



1. ECTOPIOGNATHA MINOR Perkins. Female. Genotype. 

 Length, 0.75 mm. 



Head metallic green, the seajie l.lark. rest of antenna pale yellow exoejit the dark distal 

 half of club; mesoscntum brilliant nietallic a'neus. pilose, shining, the scutellum usually darker. 



