518 Mr. R. Shelford’s Studies of the Blattidx. 
Sphecophila polybvarum. (Plate XXX, figs. 10-12.) 
6. Fulvo-testaceous, with a fine fulvous pubescence. Vertex not 
covered by the pronotum; front of head swollen and projecting as is 
common amongst the Corydiine; eyes very much reduced, scarcely 
visible from the front and almost entirely hidden under the deflexed 
sides of the pronotum; one pair of true ocelli situated low down on 
the frons and closer together than the antennal sockets ; maxillary 
and labial palpi small. Antenne short, of twenty joints, the first 
joint longer than broad, the second as broad as long, the third longer 
than broad, the remaining joints at first broader than long, but 
gradually becoming longer, the last four or five joints almost monili- 
form. Pronotum with anterior and posterior margins truncate, 
narrower in front than behind, longer than broad, sides deflexed ; 
meso- and metanotum broader than long, their posterior angles only 
slightly produced backwards. Nine abdominal tergites, including 
the supra-anal lamina, are visible, posterior margins of the first three 
and of the eighth straight, of the fourth to the seventh concave; 
the supra-anal lamina is semi-orbicular. Cerci one-jointed, acute, 
equal to the supra-anal lamina in length. Eight abdominal sternites, 
including the sub-genital lamina, are visible; sub-genital lamina 
slightly produced, not extending as far as the supra-anal lamina, 
with one pair of styles equalling in length the cerci and clothed 
with a few erect hairs. Femora without spines, on the anterior 
margin beneath of the front femur is a row of stiff sete, a genicular 
spine on each femur, no apical spines. Spines on tibize above in 
three rows, five apical spines on the posterior tibiae. Metatarsus 
longer than the remaining joints, no arolium between claws. 
° unknown. 
Total length 3 mm. —3'2 mm. 
StrE. MARIE, OYAPOCK, FRENCH GUIANA (F. Geay, 1900). 
Ten examples (Paris Museum); from the nest of Polybia 
pygmed, Fab. 
The absence of female examples is striking, but it is 
possible that the entire colony was not secured by the 
collector, some individuals may have escaped from the 
nest. J cannot be certain that the specimens here de- 
scribed are fully adult, but I am inclined to think that 
they are, or if not, that the adults are apterous, for 
nymphs of winged cockroaches have the posterior angles 
of the mesonotum and metanotum much more strongly 
produced backwards than is the case in the specimens 
before me. 
