1929] 
Identity of Xenillus clypeator 
127 
tubercular projection of the tectopedium] . They receive in 
their spread an inferior, horizontal piece which springs 
from below the first segment of the thorax, bends at its an- 
terior part and houses itself in the midst of the three others. 
This single piece, larger than each of the preceding, con- 
stitutes of itself, the labium.” 
“Above this head one finds a solid organ which surpas- 
ses it at the sides, and gives it [the head] the appearance of 
being retracted beneath its lower [proximal] part; it is 
composed of three pieces, two lateral and a median. The 
median piece is convex, closely fused with the two lateral 
pieces, near the posterior half of its lateral edges, and ends 
anteriorly, as already stated between the two pieces of the 
upper lip [genae]. The two lateral pieces [lamellae] are tri- 
angular; situated on a higher plane than the median piece, 
they seem to continue by their exterior edges the curve 
form by the sides of the carapace [notogaster] [see Michael 
1883, pi. 17, figs. 1 and 12 or Nicolet pi. 7 (31), fig. 9]. 
Their small end directed forward is pointed, projecting, 
but does not extend to the extremity of the head ; their base 
articulates with the anterior and lateral part of the dorsal 
piece [i. e. notogaster] ; their inner edges recurve and 
merge, first [on the inside] with the median piece [of the 
tectum], then [on the outside] with the lateral pieces of the 
upper lip [i. e. the proximal part of the genae or acropleuron 
of Michael], forming with them an obtuse more or less 
rounded angle. These two lateral pieces [lamellae] include 
between them and the genae, a deep groove which encloses, 
at its posterior part, a small, round black eye, without facets 
[pseudostigmata], and, a little below this thing, that little 
cylindrical body which we have noted as probably being the 
first article of the antennae described by Robineau-Desvoidy 
[i. e. coxa of leg I].” 
Thus the description corresponds accurately with these 
so called Cepheus and as he describes the apex of the lamel- 
lae as pointed, it would seem to be C. vulgaris Nicolet (=N. 
teg ecr anus Hermann). The generic identity is further 
corroborated by the description of the legs which Michael 
has figured on plate 17. Lucas and Demary say: “We have 
