668 A REVISION OF AUSTRALIAN SPECIES OF GENUS CERCERIS, 



Cerceris varipes Sm. 



Cerceris varipes Sm., Ann. Mag. Nat. Hist.(4), xii., p.413, 1873,9- 



$. Nigra; clypeo, margine interiore oculorum latissime, tegulis 

 macula, tarsisque intermediis flavis; segmentis dorsalibus secundo 

 quintoque fascia latissima, femoribus apice, tibiis, tarsisque anticis 

 et posticis aurantiacis; clypeo lamina apice libera, porrecta, apice 

 leviter incisa; mesopleiiris spina curvata armatis ; segmento 

 mediano area basali longitudinaliter striata; segmentis ventralibus 

 2-5 linea longitudinali mediana impressa; area pygidiali triangu- 

 lari, elongata; alis hyalinis, costa obscura. Long. 1 6 mm. 



§. Mandibles with two very blunt teeth at about one- third from 

 the apex; clypeus broader than long, the lamina free at the apex 

 and porrect, shallowly incised in the middle. Antennae inserted 

 twice as far from the base of the clypeus as from the anterior 

 ocellus, second joint of flagellum half as long again as the third. 

 Mesopleurfe armed with a curved spine; first abdominal segment 

 nearly twice as broad as long; ventral segments 2-5 with an im- 

 pressed longitudinal line in the middle; pygidial area elongate- 

 triangular, more than twice as long as the breadth at the base, 

 the surface granulate. Vertex closely and shallowly punctured, 

 mesopleurpe more coarsely punctured, enclosed area at the base of 

 the median segment closely longitudinally striated; the rest of the 

 insect more or less shining, minutely punctured. 



Hab. — Adelaide, S.A. 



I have seen only the type of this fine species, which may easily 

 be distinguished by the spine on the mesopleurse, and the con- 

 spicuous colouring. 



Cerceris froggatti, sp.n. 



2- Nigra; clypeo macula basali, scapo apice, margine interiore 

 oculorum latissime, macula parva pone oculos, tegulis macula, 

 segmento dorsali secundo macula laterali, tertio lateribus, quarto 

 linea basali excepta, quinto sextoque fulvo-ferrugineis; segmentis 

 venti'alibus 3-6 basi latissime ochraceis; alis subhyalinis, margine 

 cosiali fuscis; clypeo apice depresso, in medio porrecto et late 

 emarginato, angulis denticulatis; mesopleuris bituberculatis, seg- 



