Dysdera.— Harpactes. 401 
mounted by a row of teeth (4 in number), a cavity towards the apex to 
receive the claw which is very long and strong. 
Mazille anteriorly triangular, contracted in the middle and very much 
dilated posteriorly where the palpi are attached; labial edge nearly 
straight. 
Lip elongate, gradually narrowing to the apex, which is truncated 
and grooved, the sides posteriorly slightly curved out to receive the 
maxille. 
Palpus with the 2nd joint much curved, the last short in the male, 
and with the fecundating appendage oval, 
Eyes, the anterior distant, so as to give the appearance of a horseshoe, 
and not much larger than the other pairs. 
Legs, the 4th pair longest. 
Dysdera erythrina, Auct. 
Dysdera? parvula, Dufour. 
Div. 2. HarpactrsEs. 
Mandibles somewhat vertical, small, elongate, abruptly truncated at 
the apical extremity, with 2 or 3 minute teeth; the claw very short. 
Mazille elongate; the sides parallel, rounded at the extremity, trun- 
cated obliquely internally, a little dilated externally to receive the palpi. 
Lip elongate, rectangular, slightly contracted at the apex and dilated 
at the base. 
Palpus with the 2nd joint not much curved, the last moderately long, 
and the fecundating organ somewhat cylindric. 
from want of sufficient light and the foreshortening. If the drawing of the 
jaws of the last species described in this paper which was taken with the parts 
in situ, were placed side by side with the correct representation in the accom- 
panying drawing, no one could conceive that they belonged to the same 
species. Iam inclined to think that Walckenaer’s division Triangularilabre of 
the genus Theridium, has been formed by a mistake of this kind, the triangular 
anterior lip being plainly seen and the minute fine Jine which marks the edge 
of the posterior being not at all discernible, unless after dissection, in a great 
many species, 
Vou. V. DD 
