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



$ . Head smooth aud shining, broader anteriorly than 

 long, very strongly narrowed posteriorly, only slightly con- 

 vex ; pronotum with a low carina on the posterior half, as 

 long as broad, a little narrowed posteriorly ; scutellnra and 

 median segment combined shorter than the pronotum ; 

 thorax and abdomen subopaque, almost smooth, the median 

 segment shining. First dorsal segment rather broadly 

 depressed at the apex; second dorsal segment with three 

 strong transverse carina, including the raised apical margin ; 

 pygidium very narrow, the sides parallel, narrowly truncate 

 at the apex. Legs slender. 



^ . Head and thorax very finely and closely punctured ; 

 clypeus rather narrowly truncate at the apex ; antennse 

 rather slender, a little longer than the thorax and median 

 segment combined, of about even thickness throughout. 

 Scutellum strongly convex, median segment shining and 

 almost smooth. Abdominal segments rather strongly con- 

 stricted at the base, subopaque and almost smooth. Hypo- 

 pygium produced into a slender acute and somewhat recurved 

 spine, with a small spine on each side at the base. Second 

 abscissa of the radius a little longer than the third ; second 

 recurrent nervure received at one-sixth from the base of the 

 third cubital cell. 



Hub. Aru {Eigne?'). 



I think that this is distinct from Icevissimus, Sm., which is 

 probably the female of abductor and is a much larger species. 

 From abductor the male differs in the shape of the hypo- 

 pygium, the colour of the legs, and the smaller size. 



Hemithyrinus tillyurdi, sp, n. 



$. Nigra, sparsissime punctata; froute supra antennas, macula 

 poue oculos, angulis posterioribus capitis, vertice lineis duabus 

 postice convergeutibus, macula parva frontali, pronoto margini- 

 bus lateralibus, margine postico late iuterrupto, et macula parva 

 mediali margiuis antici, scutello postice, segmentis dorsalibus 

 primo secuudoque fascia transversa iutcrrupta, tertio quartoque 

 fascia late interrupta, quinto macula utrinque segmentisque 

 ventralibus 2-4 macula laterali utrinque flavis ; segmento dorsali 

 secuudo carinis transversis 8. 



(S . Niger, albo-pilosus ; mandibulis, clypeo apice lateribusque, 

 vertice macula parva utrinque, pronoto linea arcuata interrupta, 

 raesopleuris macula parva, segmentis dorsalibus 1-6 ventrali- 

 busque 2-5 macula laterali utrinque flavis ; alls pallide flavo- 

 hyalinis, venis fuscis. 



Long., $ 18, d 23 mm. 



$ . Clypeus with a carina not reaching the apex, which is 



