AUSTRALIAN' FOSSORIAL WASPS. 63 



is much larger and broader ; the female, however, differs in the 

 shape of the head and most notably in the shape of the pygidium, 

 which, unlike typical Phymatothynnus, is narrowed at the base 

 and margined. 



Tachyxomyia maculiventris, sp. n. 



<S . Niger, albopilosus ; mandibulis, apice excepto, clypeo 

 margine apicali et in medio, macula parva utrinque inter 

 antennas, pronoto fascia arcuata, scutello postscutelloque macula 

 parva mediana, segmentis dorsalibus 2-6 macula magna laterali 

 utrinque, ventralibusque 2-6 fascia lata vix interrupta flavis ; 

 femoribus, tibiis, tarsis, segmentoque ventrali septimo ferru- 

 gineis ; alis hyalinis, venis nigris ; segmento ventrali primo 

 acute tuberculato. 



S • Head finely rugose ; thorax and median segment very 

 closely punctured ; abdomen shining, shallowly punctured. 

 Clypeus without a carina ; interantennal prominence bilobed ; 

 anterior margin of the pronotum broadly arched. First ventral 

 segment with an acute tubercle at the apex, deeply separated 

 from the second segment. Sides of the hypopygium parallel 

 on the basal half, then strongly convergent to the base of the 

 apical spine. The three apical joints of the maxillary palpi are 

 longer than the others, but not very elongate. Second recurrent 

 nervure received at about one-seventh from the base of the third 

 cubital cell. 



Hab. Cunderdin, W. Australia ; September to October 

 (Mrs. Lundy). 



This species is easily distinguished from all others of the 

 genus by the yellow markings of the abdomen, and the tubercle 

 on the first ventral segment. The form of the hypopygium is 

 very similar to that of T. abdominalis Guer. 



ElRONE ALBOCLYPEATA, sp. 11. 



S . Niger; clypeo macula apicali triangulari lineaque mar- 

 ginali utrinque, pronotoque margine anteriore linea transversa 

 utrinque albis ; alis hyalinis, iridescentibus, venis nigris. 



$ . Rufo-ferruginea, nitida ; abdomine nigro, segmento sexto 

 ferrugineo ; scutello latitudine duplo latiore. 

 Long., <S 8 - 5mm.; 5 5 - 5 mm. 



$ . Clypeus with a depressed, oblique, triangular truncation 

 at the apex. Head rather broad, not convex, closely and rather 

 strongly punctured ; the four apical joints of the flagellum 

 arcuate beneath. Thorax more finely punctured than the head ; 

 median segment rounded. Abdomen shining, closely and finely 

 punctured ; seventh dorsal segment with larger punctures, 

 broadly rounded at the apex. Hypopygium rounded, ciliated. 



5 . Head subrectangular, as broad as long, smooth and 



