74 
THOMISIDiE. 
Thomisus atomarius. PL IV, fig. 42. 
Thomisus atomarius, Walck., Hist. Nat. des Insect. Apt., tom. i, p. 523. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. vii, 
p. 449. 
— lynceus, Latr., Gen. Crust, et Insect., tom. i, p. 112. 
— similis, Wider, Museum Senckenberg., Band i, p. 275, taf. 18, fig. 8. 
Length of the female, tth of an inch. 
The eyes are disposed on the anterior part of the cephalo-thorax in the form of a crescent; 
the lateral eyes are larger than the intermediate ones, and those of the anterior row are the 
largest of the eight. The cephalo-thorax is compressed before, rounded on the sides, broadly 
truncated in front, and depressed in the anterior region ; it is of a brownish-yellow colour, 
with two longitudinal, dark-brown lines on each side, the exterior ones, which are the longer, 
being parallel to the lateral margins. The falces, maxillae, lip, and sternum are of a yellowish- 
brown hue. The colour of the legs and palpi is pale, brownish-yellow, the former having 
numerous minute, dark-brown spots distributed over their surface, particularly on the upper 
part. The first and second pairs of legs are much longer and more robust than the third and 
fourth pairs, and have the tibiae and metatarsi provided with strong, sessile spines on the 
under side. The abdomen is depressed, much broader at the posterior than at the anterior 
extremity, and projects over the base of the cephalo-thorax; it is of a pale, reddish-brown 
colour, freckled with dark-brown spots, which are much the most numerous on the upper 
part; these spots are liable to vary in number, size, and arrangement, in different indi¬ 
viduals. 
As the Thomisus lynceus of Latreille, which M. Walckenaer regards as identical with 
Thotnisus atomarius, is stated by Dr. Leach to inhabit Scotland (Supplement to the fourth, fifth, 
and sixth editions of the ‘ Encyclopedia Britannica,’ article “ Annulosa”), it is entitled to a 
place among British Spiders. 
Thomisus cinereus. PI. IV, fig. 43. 
Xysticus cinereus, Koch, Uebers. des Araclm. Syst., erstes Heft, p. 26. 
-—- •— Koch, Die Arachn., Band iv, p. 63, tab. 126, fig. 290. 
Length of the female, ith of an inch; length of the cephalo-thorax, T ' s th, breadth, ^th; 
breadth of the abdomen, ^th; length of an anterior leg, fths; length of a leg of the third 
pair, (th. 
The cephalo-thorax is large, convex, slightly compressed before, rounded on the sides, 
truncated in front, and abruptly sloped at the base ; it is sparingly clothed with strong hairs, 
