70 Mr. R, E. Turner on Fossorial Hymenoptera. 



6. Second dorsal segment entirely black . . A. hellicosus, Sm. 

 Second dorsal segment banded with 



orange or yellow 7. 



7. Three basal dorsal segments with broad 



orange fasciae ; mesonotum coarsely 



punctured-rugose A. tarsatus, Sm. 



Basal dorsal segment ferruginous, se- 

 cond with an interrupted yellow fascia ; 

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



8. Abdominal segments, except the third, 



with narrow yellow apical fascise .... 9. 

 Abdominal segments with broad orange 



fascife or almost entirely orange .... 10. 



9. Flagellum black A.fre^ichii, Turn. 



riagellum ferruginous A. coiisuetipes, Turn. 



10. Postscutellum longitudinally striated : 

 ventral segments 4-6 without cilias of 



long hairs A. cygnorum, Turn. 



Postscutellum punctured; ventral seg- 

 ments 4-6 with ciliae of long hairs .... A. aiirmitiacus, Turn. 



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

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

 must sink as a synonym. 



Arpadus bellicosus, Sm. 



Gon/tes bellicosus, Sm. Trans. Ent. Soc. London, (.3) i. 2, p. 5.5 



(1862). $. 

 Gon/tes dizonus, Handl. Sitzber. Akad. Wiss. Wien, civ. p. 873 



(1895). S. 



I have no doubt that these are identical, as Haudlirsch 

 suggests. 



In addition to this species and ciliatus, HandL, the four 

 following species may be included in the group : — 



1. Arpactus frenchii. Turn. 

 Gorytesfrenchii, Turn. Proc. Zool. Soc. Lond. p. 501 (1908). cS . 



This differs from Handlirsch's characters in not having 

 the apical joint of the flagellum curved. The fourth and 

 fifth ventral segments have cilise 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 segments, not on the second ; in frenchii on the first 

 and second, not on the third. 



