Mr. R. E. Turner on Fossorial Hymenoptera. 535 



^ . Clypeus convex, rathernatrowly truncate at the apex. 

 Antennae shorter than the thorax and median segment com- 

 bined, of almost even thickness throughout, the joints not 

 arcuate beneath ; interantennal prominence bilobed, not 

 strongly developed. Apical joints of the maxillary palpi not 

 elongate. Head, thorax, and abdomen finely and closely 

 punctured ; a ferruginous spot on each side of the vertex 

 close to the summit of the eyes, Scutellum strongly con- 

 vex. Abdomen slender, subpetiolate, the first segment 

 fully twice as long as its apical breadth ; seventh dorsal 

 segment rugose ; hypopygium small, about twice as long 

 as the greatest breadth, the sides parallel, rounded at the 

 apex, with a slender apical spine. Intermediate femora with 

 a spine beneath at the base. Third abscissa of the radius 

 half as long again as the second ; second recurrent nervure 

 received by the third cubital cell at one-fifth from the 

 base. 



? . Clypeus convex, with a carina, truncate at the apex. 

 Head nearly half as broad again anteriorly as the greatest 

 length, strongly rounded posteriorly, smooth and shining, 

 with a short frontal sulcus. Thorax much narrower than 

 the head; pronotum subquadrate, punctured. First dorsal 

 segment broadly depressed at the apex, with a rounded 

 raised mark on each side before the apex ; secoi:^d segment 

 with four transverse carina?, including the raised apical 

 margin ; dorsal plate of the pygidium lanceolate, very 

 narrow, ventral plate recurved at the sides and forming a 

 groove for the dorsal plate, a tuft of pale hairs on each side 

 near the apex of the dorsal plate. Fifth ventral segment 

 sparsely but strongly punctured. 



Hab. Stradbroke Island, Moreton Bay [Hacker) ; October. 



Allied to L. mackuyensis, Turn., from which the male may 

 be easily distinguished by the spine at the base of the 

 intermediate femora ; and the female by the absence of a 

 sulcus on the pronotum, and the shape of the head, which is 

 more strongly narrowed posteriorly. 



Epactiothynnus nitidiceps, sp. u. 



2 . Bruneo-testacea ; capite nitido, autice dilatato ; pronoto postice 

 lougitudiualiter carinato ; segmento dorsali secuiido transverse 

 tricarinato. 



J . Niger ; mandibulis basi, macula utrinque supra basin anteu- 

 narum, pronoto antice et postice, mesonoto macula longitudiiiali, 

 scutello macula parva mediana, postscutello, tegiilis segmentisque 

 dorsalibus 2-6 macula transversa utrinque pallide flavis ; pedi- 

 bus testaceis ; alls hyalinis, venis fuscii*, stigmate testacco. 



Long., $ 4, J 7 mm. 



