1882.] REV. O. p. CAMBRIDGE ON NEW ARANEIDEA. 433 



short, 4, 1, 2, 3, furnished with hairs only ; and each tarsus (so far 

 as I could ascertain) ending with three small curved claws. 



Falces small and rather weak. 



Maxillce short, strong, broadest at their extremities, nearly 

 straight. 



Labium very short, broad, about half the length of the maxillae, 

 and slightly rounded at its apex. 



Sternum somewhat quadrate in form, as though truncated behind, 

 ■where it is a little narrower than in front. 



Abdomen very large, globular (or, more properly, somewhat hemi- 

 spherical) and projecting over the cephalothorax so as almost to 

 conceal it when looked at from above and behind. Cuticle not 

 coriaceous, but marked above with four small dark impressed spots 

 in the form of a quadrangle whose anterior side is shortest. 



Ogulnius obtectus, sp. n. (Plate XXX. fig. 9.) 



Adult female, length -Jj of an inch. 



The whole of the fore part of this minute and curious little Spider 

 is of a dull yellow-brown colour. The cephalothorax is marked on 

 each side by several short, wedge-shaped, converging dark-brown 

 patches, with another stronger one on each side below the occiput. 

 The interval between the eyes of the hind central pair is much 

 greater than that between each and the hind lateral eye on its side, 

 while the relative positions of the eyes of the anterior are exactly 

 the reverse of those of the posterior row. 



The abdomen is thinly clothed with short hairs, and is of a uniform 

 somewhat vinous brownish hue. The genital aperture is of simple 

 form, and is almost concealed by the posterior side of the sternum, 

 which presses hard up against it. This part of the sternum has 

 the appearance of being crushed by the operation of the large abdo- 

 men continually pressing against it, and so giving it its quadrate 

 form. The pedicle connecting the abdomen and cephalothorax is 

 also placed abnormally high up. The spinners are short and com- 

 pact, the anterior pair being the strongest. 



This genus is allied to Stegosoma, Cambr. ; but the form of the 

 maxiilse, labium, and sternum distinguishes it at a glance ; the shape 

 of this last is very unusual, and gives rise to a quite abnormal lateri- 

 grade position of the legs. 



Two examples were contained in Mr. Traill's Amazon collection, 

 and are the smallest adult exotic Spiders I have ever yet seen, being 

 scarcely larger than a good-sized pin's head. 



Tecmessa, g. n. (nom. propr.) 



Allied to Phoroncidia, Westw. ; but^the caput is less drawn out, and 

 is rather gibbous at the top of the posterior slope. Thoracic inden- 

 tation large and deep. 



Eyes unequal in size ; the four largest form a large central quad- 

 rangle longer than broad, with the lateral pairs near on either side, 

 their eyes respectively placed very slightly if at ail obliqueiy ; and 



