THE MALE GENITALIA OF BLATTARIA. IV. 
BLABERIDAE: BLABERINAE* 
By Louis M. Roth 
Pioneering Research Laboratory 
U. S. Army Natick Laboratories 
Natick, Massachusetts 01760 
In this paper I shall illustrate and use male genitalic structures 
to show the probable relationships of the following 21 genera of 
Bionoblatta Rehn, Blaberus Serville, Blaptica Stal, Brachycola Ser- 
ville, Byrsotria Stal, Eublaberus Hebard, H emiblabera Saussure, 
Hiereoblatta Rehn, Hormetica Burmeister, Hyporhicnoda Hebard, 
Minablatta Rehn, Monachoda Burmeister, Monastria Saussure, 
Oxycercus Bolivar, Parahormetica Brunner, Petasodes Saussure, 
Phoetalia Shelford, Sibylloblatta Rehn, and Styphon Rehn. 
Princis (i960) placed most of the above genera in 2 subfamilies 
(Blaberinae and Brachycolinae) of Blaberidae. He also included 
Cacoblatta Saussure and Mesoblaberus Princis in the Blaberinae 
but I have not seen any males of species belonging to these genera. 
Anchoblatta Shelford, which Princis (i960) included in the Brachy- 
colinae with a (?) and listed under this subfamily in his 1963 
Catalogus, has male genitalia characteristic of the Panchlorinae and 
I have assigned it to this subfamily (Roth, 1971). 
McKittrick (1964, p. 34) stated “The Blaberinae are the largest 
subfamily in this complex [Blaberoid Complex], and it forms a 
peculiarly diverse group made up entirely of tropical and subtropical 
New World forms. It includes here both the Blaberinae and 
Brachycolinae of Rehn (1951) and Princis (i960). Because of 
overlapping characteristics, any subdivision at this level would neces- 
sarily be arbitrary. As may be seen in tables VI ['$ genitalia] and 
VII [proventriculus], there are no clear divisions within the group, 
only distinct trends.” Previous studies (Roth, 1969, 1970a, 1970b) 
have indicated that the male genitalia of species of Blaberidae pos- 
sess excellent characters for showing subfamily, tribal, generic, and 
species group characteristics, and in the present study this was 
found to be true for the Blaberinae. 
I shall follow McKittrick in assigning all of the genera she studied 
* Manuscript received by the editor April 8, 1970. 
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