70 Mr. H. E. Tiivner on Fossor'ial Hymenoptera. 



G. Second dorsal segment entirely black . . A. bellicosiis, Siu. 

 Second dorsal segment banded with 

 orange or yellow 7. 



7. Three basal' dorsal segments with broad 



orange fascire ; mesonotum coarsely 



punctured-rugose A. tarsctlus, Sm. 



Basal dorsal segment ferruginons, se- 

 cond with an interrupted yellow fascia ; 

 mesonotum sparsely punctured A. 2»'etiostis, Turn. 



8. Abdominal segments, except the third, 



with narrow yellow apical fasciae .... 9. 

 Abdominal segments with broad orange 



fascioe or almost entirely orange .... 10. 



9. Flagellum black A.frenchii, Turn. 



Flagellum ferruginous A. comuetipes, Turn. 



10. Postscutellum longitudinally striated : 

 ventral segments 4-G without cilia} of 



long hairs ' -4. cijgnorum, Turn. 



Postscutellum punctured; ventral seg- 

 ments 4-6 with cUite of long hairs .... A. aurantiacus, Turn. 



Mr. Durrant has pointed out to me that the name Arpactus, 

 Jur.. has priority for the genus over Gorytes, Latr., which 

 must sink as a synonym. 



Arpadus bellicosiis, Sm. 



Oon/tes bellicosus, Sm. Trans. Ent. Soc. London, (3) i. 2, p. 5-3 



(1862). $. 

 Gon/tes dizomis, Ilandl. Sitzber. Akad. T\'iss. Wien, civ. p. 873 



(i89.5). d. 



I have no doubt that these are identical, as Handhrsch 

 suggests. 



In addition to this species and ciliatus, Ilandl., the four 

 following species may be included in the group : — 



1. Arpactus frenchii, Turn. 

 Gorytes frenchii, Turn. Proc. Zool. Soc. Lond. p. 501 (1908). J. 



This differs from Handlirsch's characters in not having 

 the apical joint of the flagellum curved. The fourth and 

 fifth ventral segments have ciliaj of long hairs near the 

 apex. The fore tarsi have a few short but distinct spines ; 

 intermediate tibiae with two strong apical spines. This 

 species is nearer to bellicosus than to ciliatus. The type is 

 from Victoria, but I have seen a specimen taken near 

 Sydney. 



In bellicosus the yellow apical bands are on the first and 

 third segment?, not on the second ; in frenchii on the first 

 and second, not on the third. 



