1970] 
Roth — Male Genitalia of Blattaria 
1 1 1 
The male genitalia of species of Epilampra (lacking tergal glands) 
consist of 3 principal phallomeres (Roth and Gurney, 1969) which 
may vary sufficiently in shape to distinguish species and species groups 
(Roth, 1970). All 3 phallomeres of Epilampra differ basically from 
Poeciloderrhis (cf. Figs. 1-3 and 4-6). The two genera may be sep- 
arated in the following key: 
1. Males without tergal modifications on segments 1 and 2. L2d 
and L2vm separated from each other, and the prepuce usually 
distinctly outlined and setose (Fig. 1). Hooked portion of 
R2 usually relatively slender and tapering (sometimes broad- 
ened in the middle by a flange), with a subapical incision, and 
subapical lobe (Fig. 2). Li with or without a setal brush 
(Fig. 3), and cleft not fused together. Epilampra spp. 
2. Males with tergal glands on abdominal segments 1 and 2 only. 
L2d pointed and fused solidly to L2vm ; prepuce membranous, 
not clearly defined by dense setae (Figs. 4, 7, 10, 13, 16, 19, 
22, 23, 25, 28, 31, 34, 37). R2 short and stout, without apical 
incision (Figs. 5, 8, 11, 14, 17, 20, 24, 26, 29, 32, 35, 38). 
Li without a setal brush and the sclerotized cleft fused to- 
gether (Figs. 6, 9, 12, 15, 18, 21, 27, 30, 33, 36, 39) 
Poeciloderrhis spp. 
The tergal glands on segments one and two of Poeciloderrhis show 
greater differences between species than do their genitalia and the 
following key characters may be used to distinguish the forms dis- 
cussed in this paper: 
1. Glands without sclerotized horns or deep depressions on either 
segments one and two. Segment 1 with a low median ridge 
flanked on each side by raised mounds bearing setae. Segment 
2 with a transverse elevation bearing setae; medially, a small 
vertical ridge anterior to the elevation (Fig. 40). sp. A. 
Modifications include medial knobs on segments 1 and 2, or 
a sclerotized horn on segment 2 only 2. 
2. Sroad, anteriorly rounded, relatively flat medial knobs on seg- 
ments 1 and 2. catharina (Shelford) (Figs. 41, 42). 
atriventris (Saussure) (Figs. 43-44). 
Segment 2 with a black sclerotized horn arising from a deep de- 
pression 3. 
3. Deep sclerotized pit behind the black horn on segment 2; horn 
relatively short and stout. Segment 1 with a well defined 
medial mound, bearing fine short setae (Figs. 45-46). 
ferruginea (Brunner). 
