AUSTRALIAN FOSSORIAL WASPS. 00 



first recurrent nervure received just beyond two-thirds from the 

 base of the second cubital cell, second at about one-tenth from the 

 base of the third cubital cell. 



$ . Head shining, very sparsely punctured, a little longer than 

 the greatest breadth, narrowed posteriorly, not convex, without 

 a frontal sulcus. Thorax much narrower than the head ; the 

 pronotum longer than broad, slightly narrowed posteriorly, with 

 a median sulcus on the anterior half, slightly raised posteriorly 

 and subtuberculate ; scutellnm very small, subtriangular ; dorsal 

 surface of the median segment shorter than the scutellum. 

 Dorsal segments of the abdomen very broadly depressed at the 

 apex, the raised basal portion bilobed, second segment without 

 transverse carina?. Pygidium arched, narrow, lanceolate, the 

 sides densely clothed with long pale fulvous hairs, which also 

 cover the fifth ventral segment. 



Hah. Cunderdin, AV. "Australia: February to March (Mrs. 

 Lundy). 6 $ in cop. 



This little species is not very near typical Gymnothynnus, and 

 can only be placed provisionally in the genus. The form of the 

 male hypopygium is singular ; aud though the sculpture of the 

 abdomen and form of the pygidium of the female are very near 

 G. trianguliceps Turn., the form of the head and pronotum differ 

 very greatly. That species and leso^vfi Turn, are most nearly 

 related to the present species, and none of them is very near 

 typical Gymnothynnus. G. carissimus, described above, seems to 

 form a link connecting them with the typical species. 



AsPIDOTHYNNUS FOSSULATUS, Sp. U. 



c? . Niger ; mahdibulis, apice excepto, clypeo linea marginal i 

 utrinque, macula minuta utrinque inter basin antennarum, pronoto 

 margine anteriore in medio interrupto, tegulis, scutello linea 

 abbreviata longitudinali, postscutello linea transversa, meso- 

 pleuris macula parva sub alis, segmentisque dorsalibus 2-4 macula 

 transversa utrinque flavidulis ; pronoto margine posteriore late 

 luteo ; femoribus anticis dimidio apicali, tibiis anticis tarsisque 

 ferrugineis ; alis hyalinis, venis fuscis. 



2 . Fusco-ferruginea ; thorace, segmentisque dorsalibus tertio 

 quartoque dimidio apicali nigris ; capite utrinque concave 

 depresso ; segmento dorsali secundo transverse quadricarinato, 

 pronoto angulis anticis tuberculatis. 



Long., <3 10 mm.; § 6 mm. 



c? . Clypeus convex, longer than broad, with a longitudinal 

 carina, rather broadly truncate at the apex, the anterior angles 

 rounded ; interantennal prominence very feebly developed ; 

 antennas about as long as the thorax and median segment com- 

 bined, of almost even thickness throughout. Head long and 

 narrow, closely and finely punctured, thorax more finely and 

 sparsely punctured ; anterior margin of the pronotum straight ; 

 scutellum strongly convex. Abdomen elongate fusiform, the 



