Mr. U. I'i. I'liriier o>i Fo'isoridl //i/mennptera. ').');■) 



Genus TACHYsnrKX. 

 Kei/ to the Tasmanian Species. 



n n 



4 + 



1. Modiim 3C:jiuont suiootli 1*. 



Median se^riueiit ruf^tist'-reticnliite 7'. riiffidursatu.n, Turn. 



2. Second joint of the tlnjellum lon^jer than tho 



tliird T. pacificus, Turn. 



Second joint of the tlagellum equal to or 

 shorter than the third , 3. 



3. Second j>iint of tho flaijenuin equal to tlio 



third ; pygidiuin stronj^'ly conipreasod 



laterally T. pugnator, Turn. 



Second joint of the Ha-jelhuu ?*horter than tho 



third ; pygiilium not conipressijd laterally. T. discrepaiis, Turn. 



Tachi/sphe.v pacijicus, Turn. 

 Tachysphex pacificus, Turn. Proc. Zool. Soc. London, p. 491 (1908). $ . 



Ilah. Mt. AVellington, 2200 ft.; January. Eagleliawk 

 Neck ; February. 



Originally described from Victoria. 



The antenna^ are ratlier slender, the second joint of the 

 flagelluni considerably longer than tlie third. 



Tachysphex discrepans, sp. n. 



? . Black ; the mandibles at the apex t'usco-ferriiginous ; 

 tegulai testaceous brown ; spines of the anterior tarsi 

 testaceous. 



Clypcus o,bliquely depressed from below the middle fo the 

 apex, sliiniiig and spaisely punctured. Head opaque, tho 

 antennse rather stout, third joint of tiie tlagellum longer than 

 the second by about one-quarter ; eyes 8ei)arated on the 

 vertex by a distance equal to about twice the length of the 

 second j'liiit of the tlagellum ; a di.stinct longitudinal frontal 

 sulcus reaching the anterior ocellus, a strong depression on 

 the vertex behind the posterior ocelli. Pronotum very much 

 depressed below the mesonotuni, almost vertical ; thorax 

 shining and only microscopically punctured. Median seg- 

 ment opaque, smooth, very broadly rounded at the apex, with 

 a deep groove on the middle of the posteiior slope. Abdomen 

 shining, microscopically punctured, a band of white pubes- 

 cence on each side of tho apical margin of segments l-.'i ; 

 apical segmeiit not comj)re.>53ed laterally, elongate-triangular. 

 hiiat and third abscissa) of the radius about equal in len"^th, 

 the second di.-tinclly longer, recurrent norvuros separated by 



