200 NORTH AMERICAN MUTILLIDAE 



This is suggested by the fact that the only red specimens I have 

 from the north came from along the coast, Ocean County, New 

 Jersey, and Yaphank, Long Island, while Melander records 

 them from Woods Holl, Mass. A series of twenty, representing 

 three species, collected by Mr. Nathan Banks at Falls Church 

 in the Piedmont region of Virginia are all black, and so is the only 

 specimen that I have from Upper Austral Georgia, namely, 

 from Austell, while all of my numerous specimens from Lower 

 Austral localities, namely. Southern Pines, North Carolina; St. 

 Simon Island, Okefenokee Swamp and Decatur County, Georgia, 

 and various Florida localities are all red. The present evidence 

 therefore suggests that black specimens of hexagona, rufa and 

 briaxus are to be looked for in the LTpper Austral region, except 

 along the very coast, and red ones in the Lower Austral and 

 strictly coastal regions of the Carolinian. 



The following characters of the males, varying within the 

 genus but showing no variation within the species, are of impor- 

 tance for specific diagnosis: shape and size of tooth on the infe- 

 rior margins of the mandibles, or its absence; shape and sculp- 

 ture of the face, size of the ocelli (varying within certain limits, 

 see remarks under hexagona), presence and shape of a swelling 

 on each side of the mesosternum; presence of a carina or other 

 process on the middle coxa in front, and of a subapical blunt 

 tooth behind; nature of lateral carinae or tubercles on the fifth 

 to eighth ventral segments, and armature of the pygidial segment. 



The females of the genus have heretofore been all associated 

 under the name dubitata Smith, excepting euterpe which occurs 

 only in Florida. Rohwer has identified certain Coloradan 

 females with briaxus Blake, known otherwise in the male sex. 

 The statement has been general that dubitata is the female of 

 hexagona. 



When I received the type of ornati'pennis from Mr. Manee, it 

 still held, clasped in its mandibles around the neck, a female, 

 with which it had presumably been mating. The extreme sim- 

 ilarity of this female, evidently belonging to the very rare ornati- 

 'pennis, with the very common eastern dubitata, led to the sus- 

 picion that this was in reality a composite species. A careful 

 study of over one hundred specimens of "dubitata" from various 

 regions, substantiates this inference. There are four species 



