304 ARACIINIDE3. 



sides of the thorax brown; the abdomen ovoid, with a black or 

 brown lozenge-shaped spot above, bordered with white. 



Pktiodromus ohlonyn*, Walck., Ib., tab. ead., fig. 9, This 

 species, as respects the relative proportion of the legs, and the 

 disposition of the eyes, belongs to the same division ; but the 

 abdomen is longer and almost cylindrical or forming an elon- 

 gated cone, with three brown longitudinal streaks and points on 

 a yellowish ground, which is also the colour of the thorax, 

 In the middle of the latter are two brown streaks forming an 

 elongated V. 



These two species inhabit the environs of Paris. For the 

 other, see the Faune Fra^aise, from which we have extracted 

 the preceding descriptions. 



THOMISUS, Walck. 



The Thomisi differ from the Philodromi in their chelicerse, which 

 are smaller in proportion and cuneiform, and in their four posterior 

 legs, which are evidently and even suddenly shorter than the pre- 

 ceding ones. The lateral eyes are frequently situated on eminences, 

 while those of the Philodromi are always sessile. Here also the two 

 posterior lateral ones are further behind than the two that arc inter- 

 mediate on the same line, while in the Thomisi these four eyes are 

 nearly on a level. 



The species of this genus are those more particularly designated 

 by the name of Crab-Spiders. The males frequently differ greatly 

 from the females in colour and are much smaller. 



Some of them, all exotic *, have their eyes arranged four by four 

 on two transverse and almost parallel lines, the posterior of which is 

 the longest. 



In the others, and the greater number, the ensemble of these eyes 

 represents a crescent, the convex side of which is forwards and out- 

 wards. 



Thomisus glolosus ; Araneaylobosa, Fab. ; Aranea irregularis, 

 Panz., Faun. Insect. Germ, fascic. LXXIV, tab. xx, female ; 

 Walck., Faun. Franc., Aran., VI, 4. Three lines long; black; 

 abdomen globular ; red or yellowish all round the back. 



Thomicus cristatus ; Clerck, Aran, Suec., pi. 6, tab. vi, size 

 of the preceding ; body grey-reddish, sometimes brown, with 

 scattered hairs; feet with small spines; lateral eyes largest 

 and placed on a tubercle ; a transverse yellowish stripe on the 

 front of the thorax ; two others of the same colour on the back 

 forming a V ; abdomen rounded, and a yellowish band on the 

 middle of the back with three indentations on each side. A 

 common species frequently observed on the ground. 



Thomisus citreus ; Aranea citrea, De Geer; Schseff. Icon. In- 

 sec., tab, xix, 13. A lemon yellow, with a large abdomen wider 



* Thomisus Lamarck. Lat., a species allied to the Aranea nolilis,- Fab. ; T. 

 canceruhis, Walck., ejusd. ; T. leucosia ; Aranea regia? Fab.; T. plagusius ; T. 

 pinnotheres. 



