MORGAN HEBARD 197 



REVISIONARY STUDIES IN THE GENUS ARENIVAGA 



(ORTHOPTERA, BLATTIDAE, POLYPHAGINAE) 



BY MORGAN HEBARD 



Since our treatment of this genus in "The Blattidae of North 

 America, North of the Mexican Boundary' V material of a new 

 Flori(han species received by Mr. A. N. Caudell for the National 

 Museum caused him to examine the material of the genus belong- 

 ing to that institution, which had been studied and reported on 

 by us. That author, recognizing constant male genitalic features 

 of difference in the material we had identified as apacha, sepa- 

 rated his series of the undescribed type, and described the two 

 new species, which he therefore had before him, as florklensis and 

 genitalis.^ 



In order to separate our series of the superficially similar species, 

 genitalis and n pacha, we have re-examined closely the material 

 in the Philadelphia Collections and, carrying this analytical 

 examination further than was done in the preparation of our 

 monograph, we find that superficially similar, though distinct, 

 species were also included by us l)oth under erratica and undei- 

 rehni. 



Such radical changes as the above, from assignments as recent 

 as those given in our monograph, are much regretted by us, but 

 seeing that we were seriously in error, we are most anxious to 

 admit this and present what w^e believe to be a correct analysis 

 of the species of Arenivaga.^ We feel that in the other genera 

 of the Polyphaginae, as well as elsewhere throughout the North 

 American species monographed by us, the nomenclature is on a 

 stable footing. 



> Mem. Am. Ent. Soc, 2, pp. 223-239, (1917). 



2 Proo. Ent. Soc. Washington, xx, pp. 154-157, (1918). 



^ The Polyphaginae was the first subfamily studied in our monographic 

 treatment, and for the first time the concealed genitalia of the male had been 

 used for specific diagnostic purposes. After much more intimate know- 

 ledge of these features, gleaned from the study of the Blattidae of both 

 temperate and tropical North America, we can readily see that originally 

 fear of going too far and of too great heterodoxy caused us to make the 

 mistakes in question. 



TRAN.S. AM. ENT. .SOC, XLVI. 



