108 Mr. R. E. Turner on FossorialHymenoptera. 



the costal margin shorter than the stigma, the transverse 

 cubital nervure received a little beyond one-quarter from the 

 base of the cell. 



Hah. S. Queensland, Caloundra (^Hacker) ; January. 



Nearly rehited to R. tenuiventris, Turn., but the abdomen 

 is more slender in that species, the third segment being much 

 longer than broad ; in tenuiventn's ^ the scape has a small 

 spine at the apex, the second joint of the flagellum is rather 

 more strongly emarginate beneath, and the third joint is al.-o 

 strongly emarginate beneath and snbtub&icuhite at the apex. 

 'J'he epicnemial area is detined in both species. In most 

 Australian species of Rhopalum the nuile anteniije are not 

 strongly differentiated, but in R. alicia\ Turn., and R. leptu- 

 spermi, Turn., the third joint ot the riagellum is strongly 

 emarginate beneath and subtuberculate at the apex. 



• Rhopahnn ttstaceum, sp. n. 



$ . Testacea ; capite mesonotoque uigris ; mandibulis, apice ex- 

 cepto, clypeoque flavis ; antonuis testaceis ; alls hyalinis, irides- 

 centibus, venis fuscis. 



Long. 4 mm. 



? . Mandibles acute at the apex, not bidentate ; clypeus 

 broadly rounded at the apex, with four miimte teeth on the 

 apical margin, without a carina. Head sniootli and shining ; 

 the eyes separated at the base of the clyj)eus by a distance 

 equal to rather more than two-thirds of the length of the 

 scape ; posterior ocelli as far from the ejes as from each 

 other and about the same distance from the hind margin of 

 the head ; a curved groove from the inner margin of the 

 eye, extending towards, but not reaching, the posterior ocelli. 

 Pronotum depressed below the niesonotum, almost vertical. 

 Thorax closely and minutely j)unctured, a transverse groove 

 at the base of the sCutellum. Median segment smooth and 

 shining, with a distinct median sulcus. First abdominal 

 segment a little shorter than the second, moderately swollen 

 at the apex, not very slender ; second segment longer than 

 the apical breadth ; third segment much broader than lung. 

 Hind tibiae very feebly serrate near the a{)ex. Rtcurrent 

 nervure received a little betore two-thirds from the base of 

 the cubital cell ; radial cell oblique at the apex, the costal 

 margin as long as the stigma, the transverse cubital nervure 

 received just beyond one-quarter from the btise of the cell. 



Bah. N. Queensland, Kuranda {F. P. Dodd). 



Easily distinguished by the rtmaikable colouring. The 

 first abdominal seoment is shorter than in other Australian 



