THE MALE GENITALIA OF BLATTARIA. 
X. BLABERIDAE. PYCNOSCELUS , STILPNOBLATTA , 
PROSCRATEA (PYCNOSCELINAE), AND 
DIPLOPTERA (DIPLOPTERINAE) * 
By Louis M. Roth 
Pioneering Research Laboratory 
U.S. Army Natick Laboratories 
Natick, Massachusetts 01760 
McKittrick (1964) grouped the Pycnoscelinae, Diplopterinae, 
Panchlorinae, and Oxyhaloinae, in the Panchloroid Complex of 
Blaberidae. The male genitalia of the latter two subfamilies have 
been described (Roth, 1971a, 1971b). In this paper I shall illustrate 
the male genitalia of several species of Pycnoscelinae and two species 
of Diplopterinae. 
Materials and Methods 
The genitalia were treated with 10% KOH and mounted in 
Permount. The source of each of the specimens illustrated is given 
using the following abbreviations: (ANSP) — Academy of Natural 
Sciences, Philadelphia; (BMNH) = British Museum (Natural 
History); (L) = Zoological Institute, Lund, Sweden; (MCZ) = 
Museum of 'Comparative Zoology, Harvard University; (VM) — 
Vienna Museum Natural History, Vienna, Austria. Geographical 
collection data and the names of specialists who identified the speci- 
mens, if known, follow these abbreviations. The number preceding 
the abbreviation refers to the number assigned to the specimen and 
its corresponding genitalia (on a slide) which are deposited in their 
respective museums. 
Results and Discussion 
Pycnoscelinae 
Pycnoscelus surinamensis (Linn.) is the type species but it is 
parthenogenetic and normally only exists as females. P. indicus 
(Fab.) is bisexual and apparently the parent stock from which 
surinamensis arose. Occasionally parthenogenetic males occur in 
cultures of surinamensis but they are non-functional when mated to 
parthenogenetic females (Roth, 1967). 
* Manuscript received by the editor August 27, 1973 
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