AUSTRALIAN POSSORIAL WASPS. 53 



segments 2-4 white; ventral segments 3-6 with a spine on each 

 side at the apical angles ; all the segments coarsely punctured ; 

 seventh dorsal segment rather broadly truncate at the apex. 

 Hypopygium much broader than long, the sides parallel, rounded 

 at the apical angles, the apical margin strongly hut rather 

 narrowly emarginate on each side of the short apical spine. 

 Second abscissa of the radius about twice as long as the third ; 

 second recurrent nervure received at about one-tenth from the 

 base of the third cubital cell. 



9 . Head smooth and shining, as long as the greatest breadth, 

 nearly twice as broad in front as on the hind margin ; mandibles 

 falcate. Pronotum nearly half as long again as broad, the sides 

 almost parallel, a sulcus from the anterior margin reaching beyond 

 the middle, smooth and shining, with a row of large punctures 

 on the anterior margin, from each of which springs a long hair. 

 Scutellum small, strongly narrowed to the apex; dorsal surface 

 of the median segment twice as long as the scutellum, sparsely 

 punctured. Abdominal segments very minutely and closely 

 punctured; a small, narrow, raised area on each side at the base 

 of the five basal dorsal segments; fifth segment longitudinally 

 carinated in the middle; sixth segment compressed laterally, 

 the dorsal surface oblique, very narrow, slightly broadened 

 towards the apex. Fifth ventral segment sparsely punctured. 



Hab. Kalamunda, Darling Ranges, S.W. Australia, 850 ft. ; 

 February to April. J 9 in cop. 



Taken in considerable numbers on Eucalyptus blossom. 



Otmxothyxxus CARISSIMUS, sp. n. 



cJ . Niger ; mandibulis, apice excepto, clypeo linea longitudinali 

 nigra, linea obliqua utrinque inter antennas, pronoto margine 

 anteriore et posteriore, mesopleuris maculis duabus, mesonoto 

 linea longitudinali. scutello macula mediana, maculaque utrinque 

 angulis anticis, postscutello linea transversa, segmentisque 

 dorsalibus 1-6, ventralibusque 2-5 fascia interrupta apicali albido- 

 flavis ; femoribus, tibiis tarsisque ferrugineis : alis hyalinis, venis 

 nigi'is, stigmate pailide ferrugineo. 



9 . Nigra ; tibiis tarsisque bruneo-testaceis ; segmentis abdomi- 

 nalibus apice lateribusque luteo-testaceis, pygidio pailide ferru- 

 gineo ; pronoto piano ; segmento dorsal i seen n do basi transverse 

 bicarinato. 



Long., c? 9-11 mm. ; 2 4— 6 mm. 



<$ . Clypeus produced and rather narrowly truncate at the 

 apex ; interantennal prominence broad : antenna? scarcely as long 

 as the thorax and median segment combined, tapering slightly 

 towards the apex. Pronotum short, the anterior margin almosl 

 straight ; head and thorax finely and closely punctured, opaque : 

 scutellum shining and very strongly convex : median segment 

 rounded, finely and closely punctured. Abdominal segn 

 moderately constricted at the base, shining and very sparsely 



