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199 
surface with double row of closely set, strong, short setae, pulvillus 
occupying apical 10th of ventral surface: small pulvilli on tarsomeres 
1-4; claws simple, equal; arolium of moderate size. 
Abdomen smooth (Figs. 15, 16) ; lateroposterior angles of terga 
simple; tergum 7 of male with a wide median depression in which 
a tuft of hairlike setae arises (Figs. 15, 20) ; cercus with about 9 
segments. Male genitalia: Supra-anal plate broadly triangular, un- 
specialized; subgenital plate (Fig. 9) with specialized posterior 
margin, with styli; paraprocts without conspicuous specialization; 
phallomeres (Fig. 10) of plectopterine type, 1st sclerite of left phallo- 
mere (Li) a conspicuous framework, median sclerite (L2VM) 
slender and elongate; 2nd sclerite of right phallomere (R2) a con- 
spicuous hook. Female supra-anal plate triangular, simple; subgenital 
plate broad, posterior margin weakly cleft medially and bent dorsad 
(Fig. 19). 
Fype-species : Loboptera thaxteri Hebard. 
I he name Agmoblatta is derived in part from the Greek word 
“Agmos,” meaning a break or fracture and has reference to the cleft 
of the female subgenital plate. 
Hebard (1932) described only the female of A. thaxteri and erred 
in suggesting that it is parthenogenetic ; he based this suggestion on 
the fact that all his specimens were females. The male markings 
strongly resemble those of the female (Figs. 15, 16). The female 
genitalia of A. thaxteri and Loboptera decipiens are shown in Figs. 
22 and 24. I he female genitalia of Lobopterella are illustrated by 
McKittrick (1964, p. 161). Agmoblatta thaxteri has one pair of 
spermathecae, but each spermatheca has a double terminal bulb (Fig. 
25). Loboptera decipiens also has only one pair of spermathecae 
(Fig. 23), but each has many amber-colored tubules or branches. 
Sixteen of these branches terminate in rounded colorless bulbs in 
which the sperm are stored. Among the species studied by Mc- 
Kittrick (1964), only members of the Blattidae and Cryptocercidae 
have “forked” (i.e., branched) spermathecae; none of the Blaberoi- 
7. Loboptera decipiens (Germar), male from Madeira. Spines on antero- 
ventral margin of front femur. 
8-9. Agmoblatta thaxteri (Hebard). 8. Female paratype, spines on 
anteroventral margin of front femur. 9. Male from Natick culture originat- 
ing in Buenos Aires, Argentina. Ventral view of subgenital plate. 
Abbreviations: L2VM=median sclerite (second or ventromedial sclerite 
of left phallomere); L3 = 3rd sclerite of left phallomere; LPA t= left 
paraproct; PS = piliform spines; R2 = 2nd sclerite of right phallomere; 
R3 = 3rd sclerite of right phallomere; RPA — right paraproct; RS = 
right stylus; WPA = weakly pigmented area of subgenital plate. 
