This latter species is described by Mr. Pickard-Cambridge,[64] in the following terms:—
Gen. Nemesia (Savigny).
Nemesia cæmentaria. [Plate IX.]
Syn. Mygale cæmentaria (Latr.), H. N. des Crust. t. vii. p. 164.
M. cæmentaria (Walck), Ins. Apt. i. p. 135.
Female adult, length 9 to 11 lines.
Cephalothorax rather elongate, oval, and somewhat truncated at each extremity; the caput is elevated and rounded on the sides and upper part, but less elevated than in Cteniza; the normal grooves and indentations are well marked, and the junction of the cephalic and thoracic segments is indicated by a strong deep impression or cleft, of a transverse, curved, or somewhat bent angular form, the curve or angle directed forwards. The colour of the cephalothorax is yellow-brown tinged with olive, the margins are paler, but have no distinctly defined marginal band. On the hinder part of the caput are three clear brown-yellow longitudinal stripes; the central one reaches from behind the two hind central eyes to the thoracic junction, the lateral ones converge a little to the same point, but do not reach nearly, in fact not much more than half way, to the eyes. The clypeus is of a clear brown-yellow colour also, and on either side of it (extending from each fore lateral eye), is an irregular patch of the same. The ocular region and clypeus are furnished with a few strongish black bristles, and the three yellow stripes above mentioned have a few more, those on the central stripe being the longest and strongest, and disposed in a single longitudinal row.
The Eyes, eight in number, are seated on a transverse oval eminence, and form a rectangular figure, whose transverse diameter is double the length of its longitudinal diameter: their relative position is similar to that of Cteniza, but in the present species they are smaller than in C. fodiens: those of the hind central pair are the smallest of the eight, and each is very nearly contiguous to the hind lateral on its side; the interval between those of each lateral pair is small; the space between the two central eyes of the eight is equal to an eye's diameter, and each of these is separated from the hind central and fore lateral nearest to it by a similar interval. The Legs are strong, moderately long, their relative length 4, 1, 3, 2?, but little difference is observable between 1, 3, and 2; they are furnished with hairs, bristles, and a few, not very strong, spines; each tarsus terminates with three curved claws, the two superior ones much the longest and strongest, and have a few small teeth near their base inside.
The Palpi are strong and similar in colour and armature to the legs; each is terminated with a curved black claw.