118 Mr. K. E. Turner on Fossorial Hymenoptera. 



The typical form is from Kuranda, North Queensland. 

 A pair sent from the Queensland ^luseum differ in colour 

 from the typical form, the male having the four apical dorsal 

 segments of the abdomen wholly ferruginous red, whereas 

 the Kuranda specimens have the same segments brownish 

 yellow more or less maiked with black, the fourth segment 

 being often wholly black. The female has the abdomen 

 more strongly marked with yellow than in the type, but 

 Kuranda specimens vary much in this respect and in one 

 specimen the yellow markings are almost as large as in the 

 Brisbane form. The only structural differences are the 

 slightly shorter hypopygium of the male, and the slightly 

 narrower head of the female in the Brisbane form. These 

 differences may prove to be of subspecitic value. 



Tmesothynnus ingredlens, sp. n. 



S . !N'iger ; clypeo linea marginali utrinque, niandibulis basi, 

 macula obliqua utrinque inter aotennas, pro^ioto lioea transversa 

 utrinque antice, postscutelloque albido-ilavis ; alls hyalinis, venis 

 nigris. 



2 . Bruneo-ferruginea ; segmento mediano uigro ; segmentis 

 abdominalibus tertio, quarto quintoque plus minus infuscatis; 

 segmento dorsali secundo transverse quadricariuato. 



Long., J 9 mm., $ 6 mm. 



(J . Head and thorax closely and rather finely punctured, 

 abdomen more sparsely punctured, median segment shining, 

 very minutely punctured. Clypeus truncate at the apex; 

 antennse about as long as the thorax and median segment 

 combined, of even thickness throughout, the prominence 

 between the antennae almost obsolete. Head very thin and 

 flat. Anterior margin of the pronotum straight and slightly 

 raised, median segment rounded. Abdominal segments 

 strongly constricted at the base, the seventh dorsal segment 

 very broadly rounded at the apex. Hypopygium with 

 parallel sides, broadly and shallowly emargiuate at the apex, 

 with a long apical spine. Second abscissa of the radius 

 longer than the third, second recurrent nervure received at 

 about one-tenth from the base of the third cubital cell. 



$ . Head broader than long by about one-third, the sides 

 slightly sinuate in the middle ; eyes small, oblique, narrowly 

 ovate, nearly touching the base of the mandibles ; front 

 sparsely punctured, without a sulcus, vertex almost smooth ; 

 mandibles long and falcate, not toothed. Pronotum finely 

 punctured, much broader than long, distinctly narrowed 

 posteriorly, the anterior angles prominent j scutellum broader 



