AKT. 17 



WASPS OF THE GENUS TIPHIA ALLEN AND JAYNES 



11 



RELATIONSHIPS 



As the result of the study of a long series of specimens, some of 

 which are associated with unpublished biological notes, the writers 

 are convinced that within the genus Tijyhia there are a number of 

 sub-groups of closely related species. This relationship is indicated 

 in the accompanying list of species, in which the popilUavara group 

 of five species is possibly the least specialized. Varying in different 

 directions from this central group are other groups, as w^ell as a 

 number of species which we have not yet been able to associate with 

 any group. The other groups which have been recognized are the 

 I'oreana group of eight species, the rufomandihulata group of seven 

 species, the hicoHnata group of four species, the 7iialay<Dn<i group of 

 three species, the agilh and the capillata groups of two species each, 

 the vernMlis complex, the s]3ecies totopunctata, which is quite distinct, 

 and nine species, headed by matwra^ which have some points of rela- 

 tionship but are not considered as forming a group of closely related 

 species. 



LIST OF SPECIES 



All of the species in which the male is knoAvn, except certain mem- 

 bers of the hicarlnata group, have a tooth or an orifice on the side 

 of the fifth sternite. Cilicincta and, usually, hicarinata^ are devoid 

 of sternal denticles which in fukiensis are only weakly developed. 

 This deficiency, together with the peculiar apical ciliate rows of 

 bristles on the abdominal segments and the wholly rugose pygidium 

 of the female, distinguishes this group from the others, although the 



