316 
AcantMa lectularia 
It should be stated, however, that the bug treated by them is 
rotundatus and not lectularius, but as they say that there are “ few 
divergences, except in the thorax, between this species and lectularius ” 
(p. 499) he notes the discrepancies between his work and theirs, con¬ 
sidering it unlikely that a mere difference in species would mean any 
great anatomical dissimilarity. 
Messrs Patton and Cragg repeat Landois’ errors when they describe 
the labrum as having two joints, and the labium four (p. 500), also when 
they say that the maxillae are unequal in length (p. 502). 
According to them there is no epipharynx (p. 500). 
The labium, is not, as they describe it, a hollow organ containing 
a continuation of the body cavity. It is quite solid apart from the 
tracheae in it. 
The figure (Plate lxii, fig. 4) showing the cross-section of the 
stylet tube of A. rotundata is not as in A. lectularia , where the maxillae 
are corner pieces, as may be seen in the writer’s sketch, and they do 
not anywhere in their length completely enclose the mandibles, as 
shown in the “ Textbook ” figure. 
The statement that the legs “ are not specially adapted to enable 
the bug to cling to its host ” (p. 503) is obviously wrong when the spines, 
bristles, claws, ridged empodium, and coxal “ notch ” are considered 
(see Figs. 19-20). 
There are three tarsal joints, and not four as the “ Textbook ” says. 
It would appear that the authors have mistaken the empodium for a 
tarsus joint, since they figure it (Plate lxii, fig. 6) but say that the bug 
possesses no such appendage. 
When treating of the meta-thorax there is no reference to the two 
openings of the scent glands, which openings are easily seen, and are 
mentioned moreover by Messrs Douglas and Scott. 
The first four abdominal segments have the previously mentioned 
ventral groove and the chitin thinner to allow of expansion after feeding. 
The “ Textbook ” says that only the first two are thus supplied. 
The authors say that there are five pairs of plates making up the 
anal end of the ventral surface of the female, but this is certainly not 
so with lectularia, the number, counting the two portions of the seventh 
abdominal segment, being only three pairs and an odd one. 
When discussing the sucking apparatus the “ Textbook ” omits 
any reference to the special shape of the crop, and merely says that it 
consists of “ two plates superimposed upon one another in the trans¬ 
verse plane ” (p. 514). 
